Funding Strategy and Asset–Liability Management

Introduction and context

Banks perform maturity transformation: they fund relatively short-term, withdrawable or repricing-sensitive liabilities and invest in loans and securities that are often longer-term and less liquid. This function supports economic activity, but it creates liquidity, interest-rate, refinancing and solvency risks. Treasury and asset–liability management (ALM) coordinate funding decisions, asset allocation, pricing, liquidity buffers and risk limits so that the bank can meet obligations without unacceptable cost or forced asset sales.

A sound funding strategy answers four questions:

1. How much funding is required, and when?
2. Which sources are stable, diversified and cost-effective?
3. What happens if deposits run off, markets close or collateral values fall?
4. How do asset cash flows, liability cash flows and interest-rate repricing interact?

The analysis in this chapter is conducted from the perspective of a bank treasury committee, although the principles also apply to credit unions, insurers with liquidity portfolios and other financial intermediaries.

Learning objectives

By the end of this chapter, a student should be able to:

• explain maturity transformation and its benefits and risks;
• classify funding sources by stability, maturity, optionality and encumbrance;
• analyse deposit behaviour and balance-sheet structure;
• construct a maturity ladder and calculate cumulative liquidity gaps;
• distinguish contractual, behavioural and stress cash flows;
• explain interest-rate-sensitive gaps and their limitations;
• design a contingency funding plan (CFP);
• evaluate funding decisions using governance, regulatory and ethical criteria.

1. Maturity transformation and balance-sheet structure

A simplified bank balance sheet is:

The accounting identity is:

This is an identity, not a risk measure. A bank may satisfy it while still being unable to pay a deposit withdrawal today. Liquidity concerns timing and marketability; solvency concerns whether the value of assets exceeds obligations over the relevant horizon.

Maturity transformation occurs when the weighted or contractual maturity of assets exceeds that of liabilities. It can be economically productive because depositors value liquidity while borrowers require longer-term finance. It also exposes the bank to:

• rollover risk: funding matures before assets generate cash;
• withdrawal risk: depositors exercise withdrawal rights unexpectedly;
• market-liquidity risk: assets cannot be sold quickly without a material price concession;
• funding-cost risk: refinancing is available only at a much higher spread;
• interest-rate risk: asset and liability repricing dates differ;
• concentration risk: one depositor, market or instrument dominates funding;
• encumbrance risk: pledged collateral is unavailable for other borrowing.

The net liquidity position over an interval is commonly expressed as:

where t denotes a time bucket. The cumulative gap through bucket T is:

A negative gap does not automatically imply failure: a bank may hold an unencumbered liquid-asset buffer or have reliable, available contingency funding. Conversely, a positive contractual gap does not guarantee safety if inflows are uncertain or assets are difficult to monetize.

2. Funding sources and funding quality

Funding should be evaluated on more than nominal price. Treasury normally considers expected cost, maturity, behavioural stability, collateral requirements, diversification, legal availability, operational readiness and stress performance.

Core and contingent funding

Core funding is expected to remain available through ordinary conditions and moderate stress. Examples include well-diversified, behaviourally stable retail deposits; appropriately structured long-term debt; and a portion of operational corporate deposits, subject to evidence and policy limits.

Contingent funding is available only if a triggering event, collateral delivery, lender decision or market transaction occurs. Examples include central-bank facilities, committed bank credit lines, repo capacity and emergency asset sales. A committed facility is not automatically core funding: it may contain conditions, haircut requirements, material-adverse-change provisions, operational constraints or lender discretion. It should normally be recorded separately in a CFP and subjected to drawdown testing.

A funding plan should avoid excessive dependence on a single source. Diversification is meaningful only when sources are genuinely independent; several instruments that depend on the same investor class or market can fail together.

3. Deposit behaviour and behavioural maturity

Contractual maturity is not the same as expected behaviour. A demand deposit is contractually withdrawable immediately, but a stable transaction-account balance may remain for years. A fixed-term deposit may legally mature in twelve months but be withdrawn early, renewed, or rolled over.

Treasury therefore estimates behavioural characteristics using historical observations, customer segmentation and stress assumptions. Relevant variables include:

• product type and withdrawal rights;
• depositor concentration and sophistication;
• account purpose, such as payroll or operating cash;
• rate sensitivity and competitor pricing;
• deposit insurance coverage;
• seasonality and payment cycles;
• relationship depth and digital withdrawal capability.

A basic runoff estimate is:

For example, if CU200 million of non-operational deposits has a stressed runoff rate of 25%, the stressed outflow is CU50 million. The assumption must be documented, approved and validated; it is not a universal constant.

Deposit stability is also a pricing issue. Raising rates may retain balances but compress the net interest margin. Conversely, underpricing deposits may increase outflows. ALM must connect liquidity assumptions to customer behaviour, product profitability and conduct obligations. A bank should not rely on misleading communications or unfair repricing practices to preserve funding.

4. Maturity ladders and liquidity-gap analysis

A maturity ladder allocates expected cash inflows and outflows to time bands, such as overnight, 2–7 days, 8–30 days, 31–90 days, 91 days–1 year and beyond one year. It should include:

• loan principal and interest receipts, with conservative treatment of arrears;
• securities maturities and realistic sale proceeds;
• deposit withdrawals and wholesale maturities;
• committed but undrawn lending commitments where drawdown is plausible;
• margin calls, collateral substitutions and operating expenses;
• taxes, dividends and other material cash flows.

Worked maturity-ladder example

Assume the following illustrative cash flows for a bank. Amounts are CU million. The opening readily monetizable, unencumbered liquid-asset buffer is CU90 million.

The cumulative resources are calculated as opening buffer plus the sum of net flows. The lowest point is CU10 million after 30 days. This is a warning signal, not proof of adequacy: management must compare it with internal limits, stressed collateral availability and regulatory liquidity requirements.

If management counts only CU60 million of the opening buffer as operationally available because CU30 million is reserved for settlement and market-making, cumulative resources fall to CU−20 million at 30 days. The classification of liquid assets therefore matters as much as the balance-sheet total.

A stress ladder applies scenario-specific inflows and outflows. It may assume accelerated retail runoff, greater corporate runoff, reduced loan collections, wider securities haircuts, collateral calls and no unsecured wholesale refinancing. Expected and stress ladders should not be blended without clear labels.

5. Asset–liability management beyond liquidity

ALM has at least two linked dimensions: liquidity timing and repricing timing. A repricing gap for a selected horizon is:

A positive gap means more assets than liabilities reprice within the horizon. If rates rise and asset yields adjust upward promptly while liabilities reprice more slowly, net interest income may initially increase. If liabilities reprice faster, the result may reverse. The conclusion depends on whether the instruments are fixed-rate, floating-rate, administratively priced or subject to behavioural assumptions.

The simple gap is not a complete measure of economic value. It ignores cash-flow timing within the bucket, yield-curve movements, embedded options, basis risk and changes in prepayment or deposit behaviour. More advanced institutions use duration, earnings-at-risk, economic-value sensitivity and scenario analysis.

For a fixed-rate instrument, modified duration provides a first-order approximation:

where ∆P/P is the proportional price change, D_mod is modified duration in years and ∆y is the change in yield expressed as a decimal. The approximation is suitable for small yield changes and instruments without substantial non-linearity; convexity and option effects become important for larger changes or callable, prepayable and mortgage-related assets.

6. Funding strategy design

A robust strategy proceeds through the following analytical sequence.

Diagnose the balance sheet

Map assets and liabilities by product, currency, maturity, repricing date, collateral status, counterparty, concentration and legal entity. Reconcile treasury data with the general ledger and risk systems.

Define risk appetite and limits

Limits may cover cumulative liquidity gaps, survival horizons, concentration, wholesale funding dependence, secured-funding capacity, encumbrance, foreign-currency mismatch and minimum liquid-asset holdings. Limits should have owners, escalation triggers and consequences.

Select a funding mix

The mix should align asset duration with liability tenor while preserving flexibility. Staggering maturities reduces refinancing cliffs. Stable deposits may support relationship lending, while long-term debt may fund longer assets. Short-term wholesale borrowing should not silently fund illiquid long-term growth.

Price liquidity internally

Funds-transfer pricing (FTP) allocates funding and liquidity costs to business lines. A loan should bear not only its expected credit cost and capital charge but also the cost of the liquidity it consumes. FTP improves product pricing and discourages growth that appears profitable only because treasury costs are ignored.

Test adverse conditions

Scenarios should include institution-specific stress, market-wide stress and combined stress. Reverse stress testing asks which combination of deposit runoff, market closure and asset-value decline would breach the survival horizon.

7. Contingency funding plans

A CFP is a governance and execution framework, not merely a list of possible lenders. It should specify:

1. Triggers: unusual deposit outflows, rating deterioration, widening funding spreads, collateral calls, limit breaches or market closure.
2. Indicators and reporting: frequency, data owners, thresholds and escalation routes.
3. Authorities: who can activate the plan, approve collateral movements and communicate externally.
4. Actions: retain earnings, slow asset growth, lengthen funding, raise secured funding, monetize eligible assets, access central-bank facilities where eligible, and adjust pricing.
5. Capacity assessment: net available collateral after haircuts, operational settlement capability and legal documentation.
6. Communication: supervisors, major counterparties, depositors, employees and investors, consistent with law and conduct standards.
7. Recovery and review: post-event reconciliation, model validation and lessons learned.

Committed facilities belong in the contingent section unless evidence and policy explicitly support another classification. Their undrawn amount should not be treated as cash. The usable amount is constrained by contractual conditions, lender capacity, collateral and operational readiness.

8. Detailed illustrative case: Meridian Community Bank

This is a fictional illustrative case.

Background

Meridian has a stable retail franchise but has expanded three-year commercial loans faster than its term funding. On the reporting date, its simplified balance sheet is:

The balance sheet is internally consistent: CU950 million equals CU950 million. Retail and operating deposits are treated as core subject to behavioural analysis. Institutional CDs and secured borrowing are primarily contractual wholesale funding. Meridian also has a CU100 million committed repo facility, but it is not counted as current funding or core funding. It requires eligible unencumbered securities and is available only if contractual conditions are met.

Problem

A stress test assumes CU70 million of retail and operating deposit runoff, CU50 million of institutional CD non-rollover, and CU20 million of additional collateral calls. The first-30-day cash need is therefore:

Management must show exactly how the need is covered without double counting.

Analysis and solution

Meridian identifies the following actions:

The securities actions generate CU86.4 million, not CU94 million: CU45.0 million matures and CU41.4 million is realized from sales. Adding the lending reduction gives total identified coverage of CU106.4 million. The residual need is:

Meridian then proposes a draw of CU33.6 million under the committed repo facility, but only after confirming that sufficient unencumbered eligible collateral remains and all conditions are satisfied. The draw is contingent funding. If the facility is unavailable, Meridian must use a separate, pre-approved alternative—such as an additional CU33.6 million of eligible asset monetization, a new long-term issuance, or a reduction in other cash outflows. It cannot claim that the original actions cover CU140 million.

After the draw, the sources equal the need exactly:

Outcome and learning points

The case shows why treasury reports must distinguish gross capacity from usable capacity, current funding from contingent funding, and asset-sale proceeds before and after haircuts. The bank should also reassess whether selling securities reduces its liquidity buffer, whether the repo draw creates margin-call exposure, and whether preventing new lending damages customer relationships. A board-approved CFP should define the order of actions and the point at which supervisors are notified.

9. Regulation, governance and technology

Liquidity regulation commonly combines minimum liquid-asset requirements, stress-survival measures, stable-funding expectations, large-exposure controls and supervisory reporting. Exact rules vary by jurisdiction; institutions must apply the applicable legal framework rather than substitute textbook ratios for regulatory advice.

Good governance requires independent challenge of treasury assumptions, documented model validation, segregation of dealing and control functions, accurate collateral records and audit trails. Liquidity risk can be intensified by conduct failures, such as misleading deposit marketing or concealing funding weakness from stakeholders.

Technology supports intraday monitoring, automated maturity ladders, collateral optimization, behavioural analytics and scenario dashboards. Artificial intelligence may assist anomaly detection and forecasting, but it does not remove the need for explainable assumptions, data-quality controls, model-risk governance, privacy protection and human approval. A model that predicts stable deposits from a short calm period may fail precisely when it is most needed.

10. Limitations and best practices

No maturity ladder predicts the future perfectly. Contractual data may be incomplete; behavioural models are unstable; market prices may gap; and liquidity can disappear through correlated actions. Common errors include counting the same securities both as a buffer and as sale proceeds, treating all deposits as equally stable, assuming committed lines are unconditional, ignoring currency or legal-entity restrictions, and using stressed inflows to offset unstressed outflows.

Best practice is to:

• maintain separate contractual, expected and stressed views;
• apply conservative haircuts and test collateral eligibility;
• reconcile every source of liquidity to legal and operational capacity;
• diversify funding by instrument, maturity, investor and geography;
• avoid maturity concentrations and monitor early-warning indicators;
• test CFP execution, including settlement and communication;
• validate behavioural models and back-test assumptions;
• report both absolute amounts and ratios relative to assets, deposits and capital.

Chapter Summary

Banks create economic value through maturity transformation but become exposed to rollover, withdrawal, market-liquidity, funding-cost and repricing risks. ALM links the structure of assets and liabilities to liquidity timing, interest-rate sensitivity, funding cost and risk appetite. A balance-sheet identity does not establish liquidity adequacy.

Funding sources must be classified by stability and availability. Core funding is expected to persist in ordinary and moderate stress; committed facilities, repo capacity and central-bank access are normally contingent and conditional. Deposit behaviour requires evidence-based assumptions rather than reliance on contractual maturity alone.

Maturity ladders allocate inflows and outflows to time buckets, while cumulative gaps show when liquid resources may be exhausted. Stress analysis must apply realistic runoff, haircuts, collateral and market-closure assumptions. Repricing gaps and duration measures provide useful but incomplete views of interest-rate risk.

A contingency funding plan converts analysis into executable governance through triggers, authorities, capacity assessments, actions and communication. The Meridian case demonstrates that every funding source must be counted once, haircuts must be applied, and residual needs must be explicitly funded.

Key Terms

Maturity transformation: Funding longer-term assets with liabilities that mature or can be withdrawn sooner.

Asset–liability management: Coordinated management of balance-sheet structure, liquidity, interest-rate and funding risks.

Core funding: Funding expected to remain available under ordinary and moderate stress.

Contingent funding: Funding accessible only when specified conditions, collateral or market access exist.

Rollover risk: Risk that maturing funding cannot be replaced on acceptable terms.

Runoff rate: Assumed proportion of a balance withdrawn during a defined period.

Maturity ladder: Schedule of expected cash inflows and outflows by time bucket.

Liquidity gap: Difference between cash inflows and outflows for a period.

Cumulative gap: Opening resources plus accumulated net cash flows through a time horizon.

Haircut: Reduction applied to an asset’s value when estimating usable funding or collateral.

Encumbrance: Restriction created when an asset is pledged or otherwise unavailable.

Repricing gap: Rate-sensitive assets minus rate-sensitive liabilities for a horizon.

Modified duration: Approximate sensitivity of an instrument’s price to a yield change.

Funds-transfer pricing: Internal allocation of funding, liquidity and related costs.

Collateral: Asset pledged to secure borrowing.

Survival horizon: Period during which the institution can meet obligations under a defined stress.

Contingency funding plan: Pre-approved framework for responding to liquidity stress.

Concentration risk: Dependence on a limited source, counterparty, market or instrument.

Review Questions

Short Answer Questions

1. What is maturity transformation, and why does it create liquidity risk?
2. Distinguish core funding from contingent funding.
3. Why can contractual maturity misrepresent deposit stability?
4. What information does a maturity ladder provide?
5. State two limitations of a simple repricing gap.

Long Answer Questions

1. Explain how a bank should design a diversified funding strategy.
2. Discuss the construction and interpretation of a stressed maturity ladder.
3. Explain the governance components of a contingency funding plan.
4. Compare retail deposits, certificates of deposit, secured borrowing and equity as funding sources.
5. Evaluate why liquidity adequacy cannot be inferred from the balance-sheet identity alone.

Analytical / Application Questions

1. A bank has an opening usable buffer of CU75 million, inflows of CU40 million and outflows of CU90 million in week one, followed by inflows of CU55 million and outflows of CU65 million in weeks two to four. Calculate the cumulative resources after each bucket and identify the lowest point.
2. A stress event produces CU120 million of cash needs. Securities maturity provides CU30 million, haircut-adjusted sales provide CU46 million, and avoided lending outflows provide CU14 million. Calculate the residual need and explain how a committed facility should be treated.
3. A bank’s assets reprice by CU500 million within six months and its liabilities by CU650 million. Calculate the repricing gap and analyse the likely first-order effect of a rate increase, stating the assumptions required.

Multiple Choice Questions with Answers

Question 1

Which statement best describes maturity transformation?

A. Funding long-term assets with liabilities that mature or may be withdrawn sooner

B. Holding only cash and central-bank balances

C. Matching every asset and liability at exactly the same maturity

D. Replacing equity with subordinated debt

Correct Answer: A. Funding long-term assets with liabilities that mature or may be withdrawn sooner

Question 2

A bank begins with CU90 million of liquid resources and has net cash flows of −CU55 million and −CU25 million in two successive buckets. What are cumulative resources after the second bucket?

A. CU10 million

B. CU35 million

C. CU70 million

D. CU170 million

Correct Answer: A. CU10 million

Question 3

Why is a committed repo facility normally classified as contingent funding?

A. It is always more expensive than deposits

B. Its availability depends on conditions such as eligible collateral and operational access

C. It cannot ever be drawn in a stress

D. It is recorded as equity

Correct Answer: B. Its availability depends on conditions such as eligible collateral and operational access

Question 4

In the Meridian case, what was the residual need after CU106.4 million of identified coverage against a CU140 million need?

A. CU33.6 million

B. CU46.0 million

C. CU53.6 million

D. CU86.4 million

Correct Answer: A. CU33.6 million

Question 5

Which item is most directly associated with a haircut?

A. A reduction from an asset’s market value when estimating usable collateral proceeds

B. An increase in a deposit’s contractual maturity

C. A tax applied to equity dividends

D. A guaranteed increase in loan interest

Correct Answer: A. A reduction from an asset’s market value when estimating usable collateral proceeds

Question 6

If rate-sensitive assets are CU500 million and rate-sensitive liabilities are CU650 million, the repricing gap is:

A. Positive CU150 million

B. Negative CU150 million

C. Positive CU1,150 million

D. Zero

Correct Answer: B. Negative CU150 million

Question 7

Which expression is the first-order duration approximation for a bond price change?

A. ∆P/P ≈ −D_mod × ∆y

B. ∆P/P ≈ D_mod ÷ ∆y

C. ∆P/P ≈ ∆y − D_mod

D. ∆P/P ≈ D_mod + ∆y

Correct Answer: A. ∆P/P ≈ −D_mod × ∆y

Question 8

Which is an appropriate CFP trigger?

A. A material breach of a liquidity limit

B. A routine reconciliation completed on time

C. A stable insured deposit balance

D. A scheduled interest receipt

Correct Answer: A. A material breach of a liquidity limit

Question 9

Why should the same securities not be counted both as a liquidity buffer and as sale proceeds?

A. That would double-count the same source of cash

B. Securities can never be sold

C. Buffers are always liabilities

D. Sale proceeds are recorded as equity

Correct Answer: A. That would double-count the same source of cash

Question 10

Which practice most improves funding resilience?

A. Concentrating all funding in overnight wholesale markets

B. Staggering maturities and diversifying instruments and counterparties

C. Ignoring collateral haircuts

D. Treating all undrawn facilities as cash

Correct Answer: B. Staggering maturities and diversifying instruments and counterparties