Banking And Finance Mathematics | Deposits, Savings, Fixed Deposits and Loan Pricing Mathematics

Deposit and loan-pricing mathematics connects the two sides of a bank’s core intermediation engine: what the bank pays to obtain funding and what it must charge to lend that funding sustainably. Savings accounts, current accounts, fixed deposits, promotional deposit tiers, compounding, early withdrawal, deposit beta, marginal funding cost, funds transfer pricing (FTP), expected credit loss, operating cost, capital charge, liquidity premium and target return all feed the rate a bank can economically offer or charge.

For readers searching for deposit interest mathematics, savings account interest, fixed deposit interest, fixed deposit maturity, compound interest on savings, bank deposit rates, deposit beta, cost of funds, funds transfer pricing, loan pricing formula, risk based loan pricing, RAROC, effective interest rate, flat rate versus monthly rest or bank loan spread, the central proposition is that the customer rate is never “just the market rate plus a margin”. It is the visible output of several hidden balance-sheet costs and risks.

Singapore’s MoneySense guidance updated in 2026 distinguishes savings, current and fixed-deposit account features, explains compound interest, and shows why a borrower’s effective interest rate can differ materially from an advertised flat rate. This page uses those consumer-facing concepts as the outer layer and then builds the bank-side economics underneath them. The existing Bukit Timah Tutor loan-amortisation owner remains the detailed borrower cash-flow page; this article concentrates on deposits as funding and loans as priced balance-sheet assets. It is educational, not product or borrowing advice.

50-Second Router

• Savings deposit: flexible balance earning interest under product rules; interest may be tiered, conditional or compounded.
• Current account: transaction-focused deposit; explicit interest may be low or zero, but operational value can be high.
• Fixed deposit: principal placed for a fixed term at a stated rate; early withdrawal can reduce or eliminate interest depending on terms.
• Deposit compounding: effective return depends on rate, compounding frequency, balance path, fees and product conditions.
• Deposit beta: share of benchmark-rate changes passed through to deposit rates.
• Marginal funding cost: cost of raising the next unit of funding now—not the historic average cost of the old book.
• FTP: internal matched-maturity funding price assigned by treasury to products/business lines.
• Loan price: customer rate must cover funding + liquidity + expected credit loss + operating cost + capital cost + target margin, subject to competition and contract structure.
• EIR: borrower-side effective cost measure that incorporates cash-flow timing and certain fees; it should not be confused with a bank’s internal required yield.
• Flat rate: interest calculated from original principal; its EIR can be materially higher than the advertised flat percentage.
• Monthly rest: interest charged on reducing outstanding balance; common in home-loan examples.
• Verification: price deposits and loans from actual cash flows, not headline percentages alone.

The Central Proposition: A Deposit Is a Liability; a Loan Is an Asset

From the customer’s perspective, a deposit is an asset and a loan is a liability. From the bank’s perspective, the signs reverse. Customer deposits are funding liabilities: the bank owes the money back and may pay interest. Loans are assets: borrowers owe principal and interest to the bank.

This perspective change explains bank pricing. A higher deposit rate raises the bank’s funding cost but may attract or retain valuable funding. A higher loan rate increases gross asset yield but may reduce demand, increase adverse selection or borrower stress, and face competition. The economically optimal rate is therefore a constrained price, not a simple mark-up.

Adrian’s first rule is to write the bank’s cash flows with signs before touching a formula: deposit received today is cash inflow plus liability creation; deposit interest and withdrawal are future outflows. Loan disbursement today is cash outflow plus asset creation; principal and interest repayments are future inflows.

1. Savings account

Savings account is a deposit account designed for flexible saving and transactions, often interest-bearing subject to product terms. It provides bank funding while preserving customer withdrawal flexibility. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest may be calculated on daily balance and credited periodically under product rules. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A headline maximum rate can depend on tiers, salary crediting, spending or balance conditions. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

2. Current account

Current account is a transaction-focused deposit account used for payments and cash management. It can provide operationally sticky funding even if explicit interest is low. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. ExplicitRate may be zero while total service economics include fees and payment relationships. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Zero explicit interest does not mean zero economic cost or zero franchise value. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into transaction banking. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

3. Fixed deposit

Fixed deposit is a deposit placed for a specified term at a stated rate. It gives the bank more predictable contractual funding than an on-demand balance. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. MaturityValue=P(1+i·t) for simple interest or P(1+i)^n under stated compounding. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Early withdrawal rules can change realised customer return and effective bank funding duration. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into term funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

4. Principal

Principal is initial amount placed on deposit or advanced as a loan. It anchors interest and repayment calculations. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest base depends on outstanding principal definition. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Original principal and outstanding principal are different after repayments. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into all deposit/loan math. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

5. Simple interest

Simple interest is interest calculated on original principal without compounding. It is common in short-term illustrative deposit/loan calculations. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. I=P r t; A=P(1+rt). Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Using simple interest over long horizons can materially differ from compound economics. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into fixed deposits. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

6. Compound interest

Compound interest is interest added to principal so later interest earns interest. It describes accumulation of savings and many effective-rate relationships. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. A=P(1+i)^n. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Nominal annual rate and periodic effective rate must be distinguished. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into savings. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

7. Effective annual rate

Effective annual rate is annual accumulation-equivalent rate including compounding. It allows comparison of different compounding frequencies. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. EAR=(1+j/m)^m−1 for nominal j convertible m times yearly. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Dividing an EAR by m does not generally produce the equivalent periodic rate. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into rate comparison. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

8. Nominal annual rate

Nominal annual rate is quoted annual rate convertible at a specified frequency. It is a quotation convention rather than the one-year accumulation rate. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Periodic rate=j/m. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A nominal 4% compounded monthly is not exactly a 4% effective annual return. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit quotes. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

9. Interest crediting frequency

Interest crediting frequency is how often accrued interest is posted to the account. It can affect compounding if credited interest itself earns interest. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. More frequent compounding raises effective return, all else equal. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Crediting frequency can differ from accrual calculation frequency. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into savings. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

10. Daily balance method

Daily balance method is interest calculation based on each day’s account balance. It reflects deposits/withdrawals through time. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest≈Σ daily balance×daily rate. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Using month-end balance alone can misstate interest when balances change during the month. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into savings accounts. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

11. Average daily balance

Average daily balance is mean account balance over a period. It is often used for interest/fee calculations in simplified settings. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. ADB=ΣDailyBalances/NumberOfDays. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A single snapshot is not the average when cash flows are volatile. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

12. Tiered interest

Tiered interest is rate schedule where different balance bands earn different rates or bonuses. It creates a piecewise return function. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest=Σ balance in tier×tier rate×time. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Applying the top advertised rate to the whole balance can overstate return. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into savings accounts. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

13. Bonus interest

Bonus interest is incremental rate earned when specified behavioural conditions are satisfied. It makes realised yield conditional. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. TotalRate=Base+EligibleBonuses subject to caps/tiers. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Maximum headline rate can be unattainable for part of the balance or some months. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into retail deposits. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

14. Minimum balance

Minimum balance is balance threshold required to avoid fees or earn specified rates. It creates nonlinear customer economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NetReturn=Interest−Fees. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Ignoring fees can make a nominally positive interest account yield negative net return. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit comparison. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

15. Fall-below fee

Fall-below fee is charge triggered when balance falls below a threshold. It can dominate interest on small accounts. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. EffectiveNetYield=(Interest−Fees)/AverageBalance. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparing gross rates without fees is incomplete. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into current/savings accounts. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

16. Fixed-deposit maturity

Fixed-deposit maturity is date when principal and contractual interest become payable under product terms. It defines the funding horizon. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. MaturityValue follows stated accrual/compounding convention. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Auto-renewal can change future rate and liquidity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into fixed deposits. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

17. Early withdrawal

Early withdrawal is withdrawal before fixed-deposit maturity. It can reduce or eliminate interest under product terms. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. RealisedReturn depends on penalty/interest forfeiture. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Contractual term is not identical to behavioural funding duration if customers can break deposits. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into funding liquidity. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

18. Auto-renewal

Auto-renewal is automatic rollover of a matured fixed deposit into a new term under stated conditions. It can extend customer relationship but at future prevailing rates. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NewPrincipal may include matured interest depending on election. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Assuming rollover at the original rate overstates certainty. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit forecasting. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

19. Deposit insurance

Deposit insurance is statutory protection of eligible deposits up to the applicable limit per depositor/member institution. It can affect depositor confidence and runoff behaviour. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Coverage depends on jurisdiction/product eligibility. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Not every deposit-like or investment product is insured; structured products require careful classification. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit stability. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

20. Singapore Deposit Insurance Scheme

Singapore Deposit Insurance Scheme is Singapore protection administered by SDIC for eligible deposits at member institutions up to the current statutory limit. It is relevant to retail funding stability and customer risk. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. MoneySense states S$100,000 per depositor per member institution as of 2026. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Coverage rules should be checked currently; structured deposits/investments may differ. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into Singapore deposits. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

21. Deposit rate

Deposit rate is interest rate paid by bank to depositor. It is a funding cost and customer return input. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. InterestExpense≈AverageDepositBalance×EffectiveDepositRate. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Advertised new-money rate can differ from average book rate. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

22. Average deposit cost

Average deposit cost is historic/period cost of the existing deposit book. It measures current P&L funding expense. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. AvgCost=DepositInterestExpense/AverageInterestBearingDeposits. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. It can lag market rates and understate the cost of funding new loan growth. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into NIM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

23. Marginal deposit cost

Marginal deposit cost is rate/cost required to attract or retain the next unit of deposits now. It is central to incremental pricing. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. MDC≈new-money rate+acquisition/service costs−cross-sell value. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Using average cost to price incremental assets can overstate margin. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

24. Deposit beta

Deposit beta is pass-through of benchmark-rate changes to deposit rates. It determines funding-cost sensitivity. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Beta=ΔDepositRate/ΔBenchmarkRate. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Beta varies by product, customer segment, direction and competitive cycle. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into NIM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

25. Cumulative deposit beta

Cumulative deposit beta is pass-through measured over a multi-period rate cycle. It captures lagged repricing. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. CumulativeBeta=(DepositRate_t−DepositRate_0)/(Benchmark_t−Benchmark_0). Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. End-point beta can hide timing and asymmetry. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

26. Deposit lag

Deposit lag is delay between benchmark-rate movement and deposit-rate repricing. It can temporarily widen or compress NIM. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Model deposit rate as lagged response to benchmarks/competition. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Long-run beta and short-run beta are different. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

27. Deposit elasticity

Deposit elasticity is sensitivity of deposit balances to offered rate differences. It connects pricing to volume. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Elasticity≈%ΔBalance/%ΔRate or semi-elastic alternatives. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Higher rate can attract rate-sensitive money that is less stable. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit strategy. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

28. Deposit migration

Deposit migration is movement among non-interest, savings and term products. It changes both funding cost and liquidity profile. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Mix weights shift with relative rates. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Stable aggregate deposits can hide costly migration into higher-rate products. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into NIM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

29. Deposit decay

Deposit decay is runoff/retention pattern of non-maturity deposits through time. It creates an effective maturity for ALM/FTP. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Survival_t can be modelled statistically. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Historical decay may change after digital competition or crises. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

30. Deposit franchise value

Deposit franchise value is economic benefit from durable customer funding and associated services. It can lower replacement funding cost. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Value relates to expected spread versus market funding after costs/options. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Franchise value is model-dependent and not identical to accounting equity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank valuation. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

31. Wholesale funding cost

Wholesale funding cost is market borrowing rate including benchmark and bank credit/liquidity spread. It often anchors marginal funding when deposits are insufficient. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Rate=Benchmark+FundingSpread. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Wholesale cost can jump quickly in stress. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

32. Reference curve

Reference curve is term structure used as the internal base funding rate. It aligns product tenor with market funding economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. FTP base rate is drawn from a matched curve. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. One overnight rate is inadequate for a five-year fixed-rate loan. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into FTP. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

33. Funds transfer pricing

Funds transfer pricing is internal mechanism charging asset businesses for funding and crediting liability businesses for funding provided. It separates customer spread from treasury interest-rate risk. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. ProductMargin=CustomerRate−FTP−other costs. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Without FTP, loan desks can appear profitable by using deposits for free. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank management. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

34. Matched-maturity FTP

Matched-maturity FTP is FTP based on cash-flow/repricing maturity of the product. It prices term funding consistently. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Fixed 5y loan receives a 5y matched transfer rate plus adjustments. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Using current deposit book cost underprices long fixed-rate assets. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

35. Liquidity premium

Liquidity premium is charge for stable funding and liquidity consumption beyond base curve. It links pricing to NSFR/LCR economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. FTP=BaseCurve+LiquidityPremium+other adjustments. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Liquidity premium can rise sharply in market stress. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

36. Basis adjustment

Basis adjustment is pricing adjustment when asset and funding reference rates differ. It covers benchmark mismatch. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. BasisCost reflects expected spread between curves. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Ignoring SORA/deposit or currency basis can create hidden margin risk. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

37. Expected credit loss cost

Expected credit loss cost is average credit loss embedded in loan economics. It compensates for expected defaults/recoveries. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. EL rate≈PD×LGD×EAD/exposure over the pricing horizon. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Charging only funding spread ignores borrower risk. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into risk-based pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

38. Unexpected-loss capital cost

Unexpected-loss capital cost is required return on capital held for tail credit risk. It prices scarce loss-absorption capacity. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. CapitalCharge=AllocatedCapital×HurdleRate. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Expected loss and capital cost are separate layers. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into RAROC. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

39. Operating cost

Operating cost is origination, servicing, collections, technology and overhead cost allocated to the product. It must be covered for sustainable pricing. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. OperatingCost can be per account or percentage of exposure. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Small loans can be unprofitable despite high percentage spreads because fixed costs dominate. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

40. Acquisition cost

Acquisition cost is marketing, broker, sales and onboarding costs to originate deposits or loans. It affects lifetime profitability. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Amortise or charge according to economic/accounting framework. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Headline rate competition can be expensive after acquisition incentives. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

41. Servicing cost

Servicing cost is ongoing cost of maintaining the customer/product. It lowers net margin. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NetMargin=GrossMargin−ServiceCost. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Zero-fee products still incur service cost internally. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank profitability. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

42. Capital hurdle rate

Capital hurdle rate is target return required on equity/economic capital supporting the exposure. It prices shareholder capital into lending. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. CapitalCost=AllocatedCapital×TargetReturn. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Hurdle rate is an internal economic target, not the customer EIR. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

43. Target profit margin

Target profit margin is residual return the bank seeks after funding, risk and costs. It determines final required rate subject to competition. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. RequiredYield=Funding+Liquidity+EL+Operating+Capital+TargetProfit in a stylised additive approximation. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Some costs interact nonlinearly and should be modelled in cash-flow/NPV form for accuracy. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

44. Loan customer rate

Loan customer rate is contractual rate charged to borrower. It generates interest income. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. CustomerRate can be fixed, floating or hybrid. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Headline rate alone does not capture fees, reset rules or EIR. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

45. Fixed loan rate

Fixed loan rate is rate fixed for a contractual period. It transfers benchmark-rate risk to the bank unless hedged/priced. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Required fixed rate should reflect matched term funding/hedging cost. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Pricing a long fixed loan off today’s overnight deposit cost creates duration risk. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

46. Floating loan rate

Floating loan rate is rate linked to a benchmark plus spread. It transfers some rate movement to borrower. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. LoanRate_t=Benchmark_t+ContractualSpread subject to terms. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Borrower credit risk can worsen when rates rise. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

47. SORA-linked loan

SORA-linked loan is SGD loan whose rate references SORA or a SORA-based benchmark according to contractual terms. It links customer pricing to SGD overnight-rate dynamics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Rate=Reference+Spread with averaging/compounding convention specified. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Today’s SORA is not a multi-year fixed funding rate. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into Singapore loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

48. Prime/board rate

Prime/board rate is bank-administered reference rate used in certain lending products. It can change according to product terms rather than one external benchmark. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. CustomerRate=BankReference+Spread. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparisons require understanding reset discretion and notice terms. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into retail loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

49. Promotional rate

Promotional rate is temporary introductory loan or deposit rate. It creates step-up/step-down cash flows. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Model each promotional period separately. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparing only first-year rate can understate lifetime cost. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into home loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

50. Lock-in period

Lock-in period is period during which early refinancing/repayment can trigger charges or conditions. It affects customer optionality and bank expected duration. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. PrepaymentPenalty modifies cash flows within lock-in. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Contractual lock-in does not eliminate all prepayment behaviour. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into mortgages. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

51. Flat-rate loan

Flat-rate loan is loan where interest is calculated on original principal for the advertised flat rate. It can produce an EIR materially above headline rate when principal amortises through repayments. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. FlatInterest=P×r_flat×T. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparing a flat rate directly with a reducing-balance mortgage rate is misleading. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into consumer loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

52. Monthly-rest loan

Monthly-rest loan is loan where interest is calculated on outstanding balance each month. It aligns interest with declining principal. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest_t=OpeningBalance_t×monthly rate. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Payment amount may remain level while interest/principal mix changes. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into home loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

53. Effective interest rate

Effective interest rate is cash-flow-equivalent borrowing cost expressed as an annualised effective rate under the defined method. It makes timing/fees comparable. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Solve PV(net proceeds)=PV(repayments/fees) for periodic IRR then annualise. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Advertised flat rate can be much lower than EIR. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into borrower comparison. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

54. Annual percentage rate

Annual percentage rate is jurisdiction/product-specific annualised borrowing-rate disclosure concept. It resembles EIR but definitions can differ by jurisdiction. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Calculate using required included costs and conventions. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Do not assume APR, EIR and nominal rate are interchangeable globally. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into consumer credit. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

55. Origination fee

Origination fee is upfront charge associated with arranging a loan. It raises borrower effective cost and bank fee income. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NetProceeds=Principal−UpfrontFees from borrower view. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Ignoring upfront fees understates EIR. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan economics. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

56. Processing fee

Processing fee is administrative loan fee. It can be fixed or percentage-based. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Include in cash-flow model when relevant to EIR/NPV. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Fixed fees disproportionately affect small loans. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

57. Early repayment charge

Early repayment charge is fee for repaying before scheduled maturity under contract. It compensates partly for lost margin/hedging cost in some products. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. PrepaymentCashFlow includes fee if applicable. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A low-rate loan with severe prepayment penalty can be costly for a borrower expecting to refinance. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan comparison. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

58. Late fee

Late fee is charge for missed/late payments. It is contingent and should not be treated as base expected yield without behavioural assumptions. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Expected fee depends on delinquency probability. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Business models should not rely on stress fees as stable margin. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into consumer lending. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

59. Amortisation

Amortisation is scheduled reduction of outstanding principal. It changes interest income and capital exposure through time. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Balance_t=Balance_{t−1}+Interest−Payment. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Average balance is lower than original principal for amortising loans. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

60. Bullet loan

Bullet loan is loan with principal largely repaid at maturity. It maintains higher EAD and interest base through term. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest paid periodically, principal at maturity under simple structure. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Refinancing/default risk concentrates at maturity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into corporate loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

61. Revolving loan

Revolving loan is facility where customer can draw and repay repeatedly. Its utilisation and EAD vary dynamically. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest based on drawn balance; fees may apply to undrawn limits. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Current balance is not lifetime exposure. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into credit cards/lines. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

62. Loan spread

Loan spread is customer loan yield minus a chosen benchmark/FTP rate. It is the gross margin before credit, cost and capital adjustments. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Spread=CustomerRate−FTP. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A positive spread can still be unprofitable after expected loss and costs. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

63. Risk-based pricing

Risk-based pricing is setting customer price according to estimated credit risk and exposure economics. It aligns expected loss/capital cost with borrower risk. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. RequiredMargin rises with PD/LGD/EAD/capital usage. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Model fairness, legal and conduct requirements remain important constraints. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into credit pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

64. RAROC pricing

RAROC pricing is pricing to meet a target risk-adjusted return on allocated capital. It links loan economics to capital scarcity. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. RAROC=(Revenue−Funding−Operating−EL)/AllocatedCapital. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Definitions and capital allocation methods vary; use consistently. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into commercial lending. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

65. NPV pricing

NPV pricing is discounting expected product cash flows at a hurdle/transfer curve to estimate value. It handles fees, prepayment, losses and timing more accurately than additive spreads. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NPV=ΣExpectedCashFlow_t×DiscountFactor_t. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. One-period spread formulas can miss optionality and timing. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank product valuation. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

66. Break-even rate

Break-even rate is customer rate making product NPV zero after all costs under the model. It defines an economic pricing floor before target profit. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Solve NPV(rate)=0. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Competitive price below break-even destroys value unless offset by cross-sell/strategy benefits. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

67. Relationship pricing

Relationship pricing is pricing one product in context of broader customer revenues/funding. It can rationally price a loan below standalone target if the total relationship is valuable. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. RelationshipNPV=ΣProductNPVs+synergies−costs. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Cross-sell assumptions should be evidence-based, not excuses for underpricing. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into commercial banking. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

68. Cross-sell value

Cross-sell value is expected profit from other products attributable to acquiring/retaining a customer. It can subsidise a headline rate. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. ExpectedValue=ProbabilityOfCrossSell×Margin×Duration. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Over-optimistic cross-sell assumptions hide weak core pricing. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into relationship banking. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

69. Prepayment model

Prepayment model is forecast of early loan repayment. It determines expected asset duration and realised yield. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Expected cash flows incorporate prepayment hazard. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Ignoring prepayment can overvalue high-rate loans when market rates fall. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into mortgage pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

70. Deposit withdrawal model

Deposit withdrawal model is forecast of customer withdrawals/retention. It determines effective funding duration. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Survival/decay model maps balances through time. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A fixed-deposit term does not guarantee full behavioural maturity if early withdrawal is allowed. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit valuation. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

71. Interest-rate risk premium

Interest-rate risk premium is compensation for uncertainty in funding/repricing over product life. It can be embedded through hedging cost or FTP. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Price off hedgeable market curve where possible. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Using expected future rates without risk adjustment can underprice fixed-rate optionality. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loan pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

72. Hedging cost

Hedging cost is cost of swaps/options used to transform rate exposure. It belongs in product economics when the bank hedges. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Fixed-loan hedge cost derived from market swap/option prices. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Assuming hedging is free overstates margin. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

73. Option cost

Option cost is value of borrower/depositor options such as prepayment, caps/floors or withdrawals. It can materially alter fair pricing. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Option-adjusted price=base price−/＋option value depending on holder. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Headline spread ignores embedded optionality. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into mortgage/deposit pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

74. Liquidity cost

Liquidity cost is cost of maintaining HQLA/stable funding against the product. It connects product pricing with LCR/NSFR constraints. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Internal liquidity transfer charge allocated by tenor/product. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Ignoring liquidity cost favours illiquid long assets unfairly. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into FTP. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

75. Deposit insurance premium

Deposit insurance premium is bank cost associated with insured deposits under applicable scheme/funding arrangements. It can be part of all-in deposit funding economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. AllInDepositCost=Interest+insurance/levy+service cost−franchise benefits. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Customer receives protection while bank bears scheme cost according to local rules. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into deposit pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

76. Reserve/liquidity requirement cost

Reserve/liquidity requirement cost is opportunity cost of holding required balances/liquidity against deposits/assets. It affects net funding value. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Effective deployable funding

Failure mode. Treating every deposit dollar as fully lendable overstates margin. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank intermediation. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

77. Loan-to-deposit economics

Loan-to-deposit economics is relationship between loan assets and deposit funding. It provides an intuitive but incomplete funding lens. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. LDR=Loans/Deposits. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A low LDR does not imply cheap marginal funding, and a high LDR does not alone prove illiquidity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into bank funding. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

78. Deposit margin

Deposit margin is internal value of deposits relative to benchmark replacement funding. It credits deposit businesses for cheap/stable funding. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. DepositMargin=FTP credit−customer deposit cost−service cost. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A zero-interest deposit can have large value only if it is stable and operationally useful. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into FTP. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

79. Loan margin

Loan margin is customer yield minus FTP and other charges. It attributes asset-business economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. LoanMargin=CustomerYield−FTP−EL−Opex−CapitalCost. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparing gross loan rate across currencies/tenors without FTP is weak. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into profitability. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

80. Net interest margin

Net interest margin is bank-wide NII over average earning assets. It aggregates deposit and loan pricing outcomes across the whole balance sheet. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NIM=NII/AverageEarningAssets. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Product spread and bank NIM are related but not identical. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into balance sheet. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

81. Rate floor

Rate floor is minimum contractual loan or deposit rate. It creates nonlinear cash flows. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Rate=max(Floor,Benchmark+Spread). Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Linear repricing assumptions fail near floors. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into product pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

82. Rate cap

Rate cap is maximum rate under contractual terms. It limits upside/downside depending on product. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Rate=min(Cap,Benchmark+Spread). Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Caps have option value that should be priced. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into loans. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

83. Step-up deposit

Step-up deposit is deposit whose rate rises according to a schedule. It creates dated funding costs. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Interest is calculated period by period. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Average advertised rate can hide timing and early-withdrawal economics. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into fixed deposits. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

84. Structured deposit

Structured deposit is deposit product with return linked to market variables. It combines deposit and embedded derivative economics. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Payoff depends on underlying market formula. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. It should not be analysed like an ordinary fixed deposit; insurance eligibility and risk differ. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into structured products. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

85. Deposit ladder

Deposit ladder is portfolio of fixed deposits with staggered maturities. It balances reinvestment and liquidity timing. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Allocate principal across maturities. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Rates at future rollover dates are uncertain. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into household saving. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

86. Loan repricing date

Loan repricing date is next date a floating or resettable loan rate changes. It determines asset beta and FTP tenor. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Cash-flow model resets rate according to contract. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Contractual maturity is not the same as repricing maturity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

87. Deposit repricing date

Deposit repricing date is next contractual/behavioural date funding cost changes. It determines funding sensitivity. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Term deposits reprice at renewal; savings can reprice administratively. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Treating all deposits as overnight repricing overstates sensitivity. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

88. New-business margin

New-business margin is profitability of newly originated loans/deposits at current rates and costs. It can diverge sharply from back-book margin. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NBMargin=NewCustomerRate−CurrentMarginalFTP−risk/cost charges. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Strong historic NIM can hide weak current new-business economics. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into strategy. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

89. Back-book margin

Back-book margin is profitability of existing products originated at earlier rates/costs. It reflects past pricing decisions. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. BackBookYield/Cost follows contractual reset schedules. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Comparing back-book yield with current funding cost reveals repricing pressure. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into NIM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

90. Repricing wave

Repricing wave is period when large amounts of loans/deposits reset or mature. It can rapidly change NIM and customer behaviour. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Maturity/repricing ladder identifies concentration. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Average duration can hide a near-term repricing cliff. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into ALM. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

91. Pricing elasticity

Pricing elasticity is change in demand/balance caused by price/rate changes. It links rate setting to business volume. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Elasticity=%ΔQuantity/%ΔPrice. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Maximising margin per customer can reduce total profit if volume collapses. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into pricing strategy. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

92. Price discrimination

Price discrimination is different rates based on product, risk, relationship or segment subject to law/policy. It can align price with cost/risk heterogeneity. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Rate_i=Base+adjustments. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Unfair or prohibited discrimination is a legal/conduct risk; models require governance. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into credit pricing. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

93. Adverse selection

Adverse selection is higher prices causing safer borrowers to leave while riskier borrowers remain. It creates nonlinear credit response to loan rates. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. PD can increase with offered rate through selection. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A simple higher-rate-equals-more-profit model ignores borrower mix. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into credit economics. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

94. Moral hazard

Moral hazard is borrower behaviour changing after loan terms/funding are provided. It can alter default/loss risk. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Model behaviour conditional on leverage/terms. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Pricing cannot fully compensate for poor underwriting incentives. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into credit risk. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

95. Affordability

Affordability is borrower capacity to service required payments. It constrains loan size/rate independently of bank profitability. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Debt service ratios and stress payments are common tools. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. A profitable loan for the bank can be unsuitable or unaffordable for the borrower. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into responsible lending. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

96. Deposit affordability/liquidity need

Deposit affordability/liquidity need is customer need to access savings before maturity. It affects appropriate account choice and realised fixed-deposit return. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Liquidity value is customer-specific. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Highest fixed-deposit rate may be inappropriate if early access is likely. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into household finance. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

97. Net deposit return

Net deposit return is interest received minus fees and penalties over average balance. It is more meaningful than headline rate for customers. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. NetYield=(Interest−Fees−Penalties)/AverageFunds. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Conditional bonuses and minimum-balance fees can dominate small balances. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into consumer finance. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

98. Net loan cost

Net loan cost is interest plus fees and charges over cash received and timing. It is captured more faithfully by EIR than advertised rate alone. The important distinction is whether the percentage is a customer return/cost, a bank funding yield, an internal FTP rate or an economic hurdle.

Mathematics. Solve IRR of borrower cash flows. Put every cash flow on a timeline. Deposit interest, fees, loan repayments, funding charges and credit losses occur at different times, so cash-flow NPV is the most general pricing framework.

Failure mode. Nominal/flat percentages can hide expensive timing. Jo’s diagnostic is to ask whether the quoted rate applies to original principal, outstanding balance, average balance, a benchmark spread or a conditional tier.

Connection. This feeds directly into consumer finance. Ryan would calculate an effective rate or NPV from the actual cash flows and compare it with the headline percentage. The purpose is to stop labels from replacing economics.

Worked Example 1: Fixed Deposit Maturity

A customer places S$50,000 for 12 months at 3.0% simple annual interest. Maturity interest is S$1,500 and maturity value S$51,500, assuming no compounding within the term and no tax/fees under the simplified example.

If interest instead compounds monthly at a nominal 3.0% convertible monthly, maturity value is 50,000×(1+0.03/12)^12≈S$51,520.79. The difference is small over one year but real.

The product’s contractual calculation method—not the word “3%”—determines the answer.

Worked Example 2: Daily Savings Balance

A savings account holds S$10,000 for 10 days, S$20,000 for 10 days and S$5,000 for 10 days. Average daily balance over the 30-day month is (10,000×10+20,000×10+5,000×10)/30=S$11,666.67.

At a simplified 2.0% annual rate using 365-day accrual, month interest is the sum of each day’s balance×0.02/365. Using only the month-end S$5,000 balance would materially understate the earned interest.

Daily-balance products are cash-flow problems, not snapshot problems.

Worked Example 3: Tiered Deposit Rate

Suppose first S$20,000 earns 1%, next S$30,000 earns 2%, and balances above S$50,000 earn 3%, with tier-by-tier application. A S$80,000 balance earns annualised interest 20,000×1%+30,000×2%+30,000×3%=S$1,700, an average rate of 2.125%.

Applying the top 3% to the whole S$80,000 would incorrectly claim S$2,400. Tier mechanics therefore matter as much as the headline maximum.

Some real products use step-up rather than marginal tiers, so the exact product terms must be read.

Worked Example 4: Deposit Beta

Benchmark rates rise 250bp. A savings portfolio rate rises 100bp. Cumulative beta=100/250=40%. A term-deposit portfolio rate rises 200bp, giving 80% beta.

If customers migrate from savings to term deposits, average funding cost can rise by more than either product’s simple beta because the funding mix itself changes.

This is why banks model both repricing and migration.

Worked Example 5: Average Versus Marginal Funding Cost

A bank’s existing S$1bn deposit book costs 1.5% on average. To raise an additional S$100m today it must offer 3.2%. Pricing a new five-year loan at 1.5%+150bp=3.0% would already sit below the cost of the marginal deposits before credit, liquidity, operating and capital costs.

The historical average deposit cost is useful for current NIM reporting. The marginal matched funding cost is more relevant to incremental pricing.

Confusing the two is one of the classic ways a fast-growing bank can originate apparently profitable but economically weak assets.

Worked Example 6: Risk-Based Loan Pricing

A S$1m corporate loan has matched FTP 3.0%, expected credit loss 0.6%, operating cost 0.3%, liquidity charge 0.2%, capital charge 0.9% and target residual margin 0.5%. A stylised additive break-even/target customer yield is 5.5%.

If competition only permits 4.8%, the bank must decide whether relationship value, lower actual costs, different structure or strategic considerations justify the gap. It should not pretend the 70bp shortfall does not exist.

For accuracy, a real pricing engine would use timed cash flows, expected utilisation/prepayment and taxes rather than simply adding percentages.

Worked Example 7: Flat Rate Versus EIR

A S$10,000 personal loan charges 5% flat interest for three years. Total flat interest is S$1,500. If repaid in equal instalments throughout the term, the borrower’s outstanding principal declines, so the effective annual borrowing cost is materially higher than 5%.

MoneySense’s 2026 guidance highlights this exact principle: flat-rate loans calculate interest on original principal, while EIR reflects the repayment cash-flow timing and gives a better comparison with reducing-balance loans.

The bank-side lesson is that advertised rate and asset IRR should not be confused.

Worked Example 8: Monthly Rest Home Loan

A S$600,000 20-year monthly-rest loan at 3.5% nominal annual rate uses a monthly rate of 0.035/12 in the standard level-payment formula. Each payment contains declining interest and increasing principal as the outstanding balance falls.

The existing Loans, Amortisation, Mortgages, Flat Rates and Effective Borrowing Cost owner develops the borrower-side schedule in detail. Here the bank-side focus is how that cash-flow stream is funded and priced.

A long fixed-rate home loan should be compared with matched term funding/hedging economics, not only average savings-account cost.

Worked Example 9: Prepayment Changes Bank Yield

A bank originates a five-year fixed-rate loan expecting five years of spread income, but the borrower refinances after two years when rates fall. If there is no sufficient prepayment charge, future above-market interest disappears and the bank must reinvest principal at lower rates.

The contractual loan rate was fixed, but realised asset yield over the expected life differs because the borrower exercised an option. The price of that option belongs in origination economics.

This is why mortgage and fixed-rate loan pricing often includes hedging and optionality costs beyond simple funding spread.

Worked Example 10: Deposit Pricing Versus Retention

A bank has S$500m of savings deposits currently paying 1.0%. It can raise the rate to 1.8%, costing an extra S$4m annually if the balance stays unchanged. If not repriced, management expects S$150m to leave and be replaced with wholesale funding at 4.5%.

Replacement-cost increase on S$150m relative to 1.0% deposit cost is roughly S$5.25m before liquidity/franchise effects. Paying the higher deposit rate to the whole book costs S$4m, so broad repricing may be cheaper in this simplified case.

Real decisions segment customers because not every depositor needs the same rate to stay. Pricing elasticity matters.

Deposits Are Both Funding and Customer Products

A deposit account is not just a funding instrument. It can anchor salary payments, cards, transfers, wealth products and business cash management. That relationship can make the funding more stable and create fee/cross-sell revenue. Conversely, a high-rate promotional deposit may be cheap to acquire but quick to leave when another bank offers 10bp more.

This is why internal transfer pricing often credits stable deposits with a funding value above their explicit interest cost. The business unit that gathers sticky deposits has created a balance-sheet resource, not merely a customer service.

But franchise value should be evidence-based. Stability can disappear after digital competition, product changes or confidence shocks.

Loan Pricing Is a Full-P&L Problem

Gross loan rate is only the top line. The bank pays for funding, liquidity, origination, servicing and capital. It expects credit losses. It may hedge interest-rate risk. Borrowers may prepay. Facilities may remain undrawn but consume capital and liquidity. Taxes and relationship revenues can matter.

The most general method is therefore expected cash-flow NPV: forecast all loan inflows and outflows under behavioural and credit scenarios, discount them using the bank’s hurdle/transfer curve, and solve for a rate that produces the target value. Additive spread formulas are useful approximations and diagnostics.

Mira’s question is: if the customer rate stayed the same but funding, PD, prepayment or capital changed, would the loan still be attractive? If the answer is unknown, the pricing model is too shallow.

Deposit Rates and Loan Rates Do Not Move One-for-One

Policy/market rates influence both sides of the balance sheet, but through different channels. Floating loans can reprice quickly. Fixed loans may reprice only at maturity or reset. Savings rates may lag because deposit beta is less than one, then catch up as competition intensifies. Fixed deposits may reprice almost immediately for new maturities. Non-interest-bearing current accounts have zero explicit beta until customers migrate away.

The bank’s NIM depends on the weighted timing of all these repricing paths. There is no universal formula saying “a 100bp policy-rate increase raises bank margin by X”.

This is why product-level cash-flow and behavioural models matter.

A Professional Deposit-and-Loan Pricing Workflow

1. Define the exact customer cash-flow contract.
2. Convert quoted rates into compatible effective/periodic rates.
3. Estimate balance/utilisation and behavioural maturity.
4. Assign matched-maturity FTP and liquidity charges.
5. Estimate expected credit loss by horizon.
6. Allocate operating and acquisition costs.
7. Allocate capital and target return consistently.
8. Model borrower prepayment and depositor withdrawal options.
9. Calculate NPV, IRR/EIR and margin under base conditions.
10. Stress funding rates, deposit beta, PD/LGD/EAD and prepayment.
11. Compare price elasticity and customer demand/retention response.
12. Reconcile product economics to bank-wide NIM, capital and liquidity.

Common Failure Modes

1. Maximum savings rate applied to all balances

Tier and behavioural conditions can make realised average rate lower. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

2. Nominal rate compared directly with effective rate

Compounding convention must be normalised. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

3. Fixed-deposit term treated as guaranteed funding duration

Early withdrawal and rollover behaviour matter. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

4. Average deposit cost used for marginal loan pricing

New funding may be much more expensive. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

5. Flat loan rate compared with monthly-rest rate

Use EIR/cash-flow IRR for a fair comparison. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

6. Loan spread treated as profit

Expected loss, operating cost, liquidity and capital charges remain. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

7. Overnight benchmark used to price long fixed loan

Matched-maturity funding/hedging matters. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

8. Customer EIR confused with internal FTP

They answer different sides of the transaction. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

9. Prepayment ignored

Borrower options can shorten asset life and reduce realised spread. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

10. Deposit beta treated as constant

It varies across product, time, direction and competition. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

11. Cross-sell value assumed without evidence

Relationship subsidies need measurable economics. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

12. Headline rate used without fees/conditions

Cash flows, not labels, determine effective return/cost. The repair is to place every deposit or loan cash flow on the timeline and solve for the actual effective return, funding cost or NPV.

Formula Map

Concept	Simplified formula	Meaning
Simple deposit interest	I=Prt	Interest without compounding.
Compound accumulation	A=P(1+i)^n	Deposit growth with periodic compounding.
EAR from nominal rate	(1+j/m)^m−1	One-year effective equivalent.
Deposit beta	ΔDepositRate/ΔBenchmarkRate	Rate pass-through.
Loan spread	CustomerYield−FTP	Gross product spread before other costs.
Stylised required yield	Funding+Liquidity+EL+Opex+CapitalCost+TargetMargin	Diagnostic additive pricing build-up.
NPV	ΣExpectedCF_t×DF_t	General product-value framework.
EIR/IRR	Rate solving PV(net proceeds)=PV(repayments/fees)	Cash-flow-equivalent borrowing cost.

Authoritative Singapore Reference Map

• MoneySense — Understanding Bank Accounts (savings, current and fixed deposits)
• MoneySense — Effects of Compounding Interest
• MoneySense — Costs of Borrowing: Flat Rate, Monthly Rest and EIR
• MoneySense — How Home Loans Work
• MoneySense — Understanding Deposit Insurance
• MoneySense — Understanding Structured Deposits

Connected Banking And Finance Mathematics Route

• Banking And Finance Mathematics | Complete Mathematical System
• Interest Rates, Simple, Compound, Nominal and Effective Rates
• Loans, Amortisation, Mortgages, Flat Rates and Effective Borrowing Cost
• Bank Balance Sheets, NIM, Leverage and Profitability
• Bank Liquidity, LCR, NSFR and Stable Funding
• How Banks Price Loans for Risk-Adjusted Return
• How Banks Choose Deposit Rates
• Finance & Banking Algorithms

Applied Case Study 1: A salary-credit savings account

Situation. The account advertises a high maximum rate contingent on salary credit, card spend and balance tiers. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Calculate base and bonus interest tier by tier, then compute realised annual effective yield after fees. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Maximum advertised rate is not necessarily the rate earned on the whole balance. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 2: A fixed-deposit ladder

Situation. A household splits S$120,000 into 3-, 6-, 9- and 12-month deposits. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Calculate maturity values and rollover uncertainty for each tranche. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. A ladder improves access timing but future renewal rates are unknown. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 3: An early fixed-deposit withdrawal

Situation. A depositor needs cash halfway through the term. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Apply the product’s interest-forfeiture or penalty rule and compare realised return with holding to maturity. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Liquidity need can dominate headline rate when choosing the product. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 4: A bank repricing savings deposits

Situation. Benchmark rates rise and customer attrition accelerates. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Estimate deposit elasticity, beta, broad versus targeted repricing and replacement wholesale funding cost. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. The cheapest posted rate is not necessarily the cheapest funding strategy. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 5: A five-year fixed mortgage

Situation. The customer rate is fixed while deposit funding reprices. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Price from a five-year matched FTP/hedge curve plus credit, liquidity, cost and capital charges. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Average current deposit cost is not a safe long-term funding assumption. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 6: A SORA-linked SME loan

Situation. Loan coupon resets to SORA plus spread. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Separate reference-rate movement from customer credit spread, FTP basis, capital and expected loss. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Floating rate reduces bank benchmark-duration risk but can increase borrower stress when rates rise. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 7: A high-PD unsecured loan

Situation. Gross customer rate is high. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Subtract expected credit loss, operating/collection cost and capital charge before declaring high profitability. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. High yield often compensates for high risk and cost. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 8: A relationship-priced corporate loan

Situation. The standalone loan earns below target margin, but the client holds large operational deposits. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Calculate combined loan NPV plus deposit franchise/fee value with conservative retention assumptions. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Cross-sell should be measured, not assumed. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 9: A promotional home-loan package

Situation. The first two years have a low rate, followed by a higher reset formula. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Model the entire expected cash-flow horizon and borrower refinancing/prepayment behaviour. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Initial promotional rate alone is an incomplete price. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 10: A car loan quoted flat

Situation. Advertised 2.5% flat rate appears below a 3.5% reducing-balance loan. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Calculate repayment cash flows and EIR before comparing. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. Flat and reducing-balance percentages are not directly comparable. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 11: A digital bank deposit campaign

Situation. The bank offers a very high temporary rate to attract new money. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Calculate acquisition cost, expected retention after promotion and marginal funding value. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. A promotional deposit can be expensive if customers leave immediately when the bonus ends. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Applied Case Study 12: A capital-constrained loan book

Situation. Funding is plentiful but CET1/RWA headroom is scarce. The mathematical task is to separate the visible customer rate from the cash-flow economics underneath it.

Method. Increase capital charge/hurdle in pricing and rank loans by risk-adjusted return on scarce capital. Adrian writes the contract cash flows, Jo normalises rate conventions, Aisha adds funding/risk/capital costs, and Ryan solves for effective yield or NPV.

Boundary. The binding constraint can shift pricing even when funding cost is unchanged. Mira then asks whether customer behaviour changes when the bank changes the rate. Pricing is not static arithmetic when demand, retention, default and prepayment respond.

Final Principle

A deposit rate is the customer’s return and the bank’s funding cost; a loan rate is the customer’s borrowing cost and the bank’s asset yield. The same percentage sits on opposite sides of two balance sheets.

The durable mathematics is therefore cash-flow based. Savings rates depend on balance paths, tiers and compounding. Fixed-deposit returns depend on term and withdrawal rules. Loan EIR depends on repayments and fees. Bank loan pricing depends on matched funding, liquidity, expected loss, operating cost, capital and optionality.

The strongest analysis never compares headline rates before making their conventions equivalent. It never prices a long loan from a short historical funding average. It never calls gross spread profit. And it never assumes customers leave their balances unchanged when rates move.

With this owner, the core bank-side foundation from `BTT-BFM-WORLD-110` through `-140` is complete and ready to feed the later FX, derivatives, no-arbitrage, options, mortgages, consumer credit and corporate-finance branches.

Deep Practice Lab 1: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 2: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 3: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 4: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 5: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 6: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 7: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 8: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 9: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 10: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 11: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 12: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 13: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 14: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 15: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 16: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 17: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 18: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 19: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 20: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 21: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 22: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 23: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 24: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 25: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 26: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 27: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 28: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 29: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 30: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 31: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 32: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 33: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 34: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 35: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 36: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 37: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 38: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 39: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 40: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 41: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 42: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 43: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 44: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 45: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 46: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 47: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 48: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 49: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 50: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 51: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 52: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 53: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 54: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 55: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 56: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 57: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 58: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 59: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 60: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 61: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 62: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 63: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 64: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 65: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 66: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 67: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 68: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 69: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 70: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 71: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 72: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 73: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 74: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 75: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 76: Compare three deposit quotes

Take one simple-interest fixed deposit, one monthly-compounded deposit and one conditional tiered savings account. Convert all to effective realised return on the same S$ balance and horizon, including fees and eligibility conditions.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 77: Build a deposit-beta model

Create three deposit segments with different betas, lags and balances. Shock benchmark rates up and down. Calculate total funding cost and show how product migration changes the result beyond simple beta.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 78: Build a loan-pricing waterfall

Start with matched FTP, then add liquidity, EL, operating cost, capital charge and target margin. Convert the additive diagnostic rate into a full NPV model with amortising balances and compare the two.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 79: Calculate flat-rate EIR

Create an instalment loan with flat advertised rate. Write borrower cash flows, solve monthly IRR and annualise. Compare the EIR with the flat rate and with a reducing-balance loan.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.

Deep Practice Lab 80: Stress prepayment and funding cost

Price a five-year fixed loan assuming expected life five years, then assume prepayment after two years and a 100bp rise in replacement funding cost. Measure the change in product NPV.

Complete the lab from both perspectives. Ben should calculate the customer’s effective return/cost; Clara should calculate the bank’s funding or asset economics; Ethan should identify which behavioural assumption—withdrawal, prepayment, utilisation or migration—has the largest effect.

Then replace one average cost with a marginal cost and recalculate. The gap between book-average and new-business economics is often the most important hidden variable in deposit and loan pricing.