Balance-Sheet Liquidity Sources, Uses and Measurement Approaches - Article

Introduction

A bank performs maturity transformation.

It commonly accepts deposits that may be withdrawable in the short term and uses those funds to make loans and investments with longer maturities.

This creates an important question:

Will sufficient cash be available when depositors, lenders, borrowers and payment systems require it?

Liquidity is therefore not simply the amount of cash held in the vault.

RBI defines a bank’s liquidity as its capacity to fund increases in assets and meet expected and unexpected cash and collateral obligations at reasonable cost and without unacceptable losses. Inability to do this without adversely affecting the bank’s financial condition creates liquidity risk.

The 2026 IIBF BFM syllabus places Liquidity Management under Module D and specifically covers its definition, dimensions, role, measurement and management.

Learning Objectives

After studying this topic, you should be able to:

• identify major balance-sheet sources and uses of liquidity;

• distinguish funding liquidity risk from market liquidity risk;

• understand contractual and behavioural cash flows;

• explain RBI’s flow and stock approaches to liquidity measurement;

• interpret structural liquidity mismatches; and

• understand how LCR, NSFR and stress testing complement traditional liquidity measurement.

Liquidity Is a Flow Concept as Well as a Stock Concept

A bank may appear liquid because it holds a large amount of cash and marketable securities.

But liquidity must also consider timing.

For example:

• large deposits may mature tomorrow;

• loan repayments may arrive only next month;

• committed credit lines may be drawn unexpectedly;

• collateral calls may arise immediately; and

• securities that appear valuable may become difficult to sell during market stress.

Therefore, liquidity has two important dimensions:

1. What liquid resources are available?

2. When will cash inflows and outflows occur?

RBI accordingly requires liquidity to be measured through both flow and stock approaches.

Funding Liquidity Risk and Market Liquidity Risk

RBI identifies two major manifestations of liquidity risk.

Funding Liquidity Risk

This is the risk that the bank cannot efficiently meet expected or unexpected:

• cash outflows;

• future funding requirements; or

• collateral needs

without affecting its daily operations or financial condition.

Market Liquidity Risk

This arises when the bank cannot easily sell, offset or close a position at the prevailing market price because:

• market depth is inadequate;

• trading activity has declined; or

• markets are disrupted.

A bank may therefore own an asset but still face liquidity difficulty if selling it quickly requires a substantial loss.

RBI requires banks to understand and manage both forms of liquidity risk.

Balance-Sheet Sources of Liquidity

Liquidity sources are resources that provide or can provide cash to the bank.

They may be divided into normal operating sources and contingent sources.

Customer Deposits

Deposits are normally the most important funding source for a commercial bank.

They include:

• current deposits;

• savings deposits;

• retail term deposits; and

• wholesale deposits.

A diversified and stable deposit base generally provides stronger liquidity than excessive dependence on a small number of volatile depositors.

RBI’s stock approach specifically monitors the extent to which assets are funded through core deposits and the extent to which volatile liabilities support the balance sheet.

Repayment of Loans and Advances

Scheduled:

• principal instalments;

• bullet repayments; and

• interest receipts

generate cash inflows.

However, the bank should not assume that every contractual repayment will arrive exactly as scheduled. Behavioural assumptions, prepayments and possible defaults must be considered.

Maturing Investments

Government securities, money-market instruments and other investments can generate liquidity through:

• maturity proceeds;

• interest/coupon receipts; or

• sale before maturity.

Marketable securities can also provide liquidity through collateralised borrowing.

Inter-Bank and Wholesale Borrowings

Banks can access funding through instruments or markets such as:

• inter-bank borrowing;

• money markets;

• Certificates of Deposit;

• repo transactions; and

• other permitted wholesale funding sources.

Such funding can be useful but may become less reliable during stress.

Capital and Longer-Term Funding

Long-term capital and liabilities improve structural funding stability because they do not normally create the same immediate repayment pressure as short-term volatile funds.

This is one reason stable funding is important when financing long-duration assets.

Sale or Repo of Liquid Assets

A bank may generate liquidity by:

• selling marketable securities; or

• borrowing against eligible securities through repo or other collateralised arrangements.

The usefulness of this source depends on:

• marketability;

• availability of unencumbered assets;

• haircuts;

• collateral eligibility; and

• market conditions.

Central-Bank Liquidity

Eligible collateral can also support access to permitted RBI liquidity facilities.

Such facilities are important sources of contingent liquidity, but sound liquidity management should not depend entirely on emergency central-bank support.

Balance-Sheet Uses of Liquidity

Liquidity is consumed whenever the bank must make payments or provide funds.

Important uses include:

Deposit Withdrawals and Maturities

Customers may:

• withdraw current or savings balances;

• prematurely withdraw eligible term deposits; or

• receive payment when term deposits mature.

Behavioural withdrawal patterns are therefore important.

Loan Disbursements

Sanctioned loans create liquidity needs when they are actually disbursed.

A bank may also face future outflows from:

• undisbursed sanctioned limits;

• committed credit facilities; and

• expected working-capital utilisation.

Repayment of Borrowings

Inter-bank borrowings, market borrowings and other liabilities create cash outflows when they mature.

Investment Purchases

Buying Government securities, bonds and other financial assets uses available cash.

Payment and Settlement Obligations

Banks must maintain sufficient intraday liquidity to settle:

• RTGS and other payment obligations;

• securities transactions;

• forex transactions; and

• other financial-market payments.

Current RBI directions require banks to monitor expected daily gross inflows and outflows and maintain sufficient intraday funding for payment obligations.

Collateral and Margin Requirements

Derivative positions or secured transactions can create sudden requirements for:

• additional collateral;

• variation margin; or

• replacement of collateral.

These can become important during periods of market volatility.

Off-Balance-Sheet Commitments

Liquidity needs can arise when:

• customers draw committed credit lines;

• guarantees are invoked;

• Letters of Credit devolve; or

• other contingent liabilities crystallise.

RBI requires liquidity-risk identification to cover major on-balance-sheet and off-balance-sheet positions.

Sources and Uses Must Be Matched by Time

Knowing the total amount of assets and liabilities is not sufficient.

Suppose a bank expects:

• ₹500 crore inflow after six months; but

• ₹400 crore of deposits to mature tomorrow.

The bank may have positive liquidity over six months but still have a serious tomorrow-morning liquidity problem.

Therefore, liquidity measurement focuses on the timing of cash flows.

This leads to the maturity-ladder or flow approach.

Flow Approach – Structural Liquidity Statement

Under the current RBI Commercial Banks – Asset Liability Management Directions, 2025, banks use the Structural Liquidity Statement (SLS) to track cash-flow mismatches across different time buckets.

Cash flows are slotted according to:

• residual contractual maturity; or

• projected future behaviour

of assets, liabilities and off-balance-sheet items. The difference between expected inflows and outflows provides the starting point for identifying future liquidity surplus or deficit.

Important Time Buckets

The current maturity framework includes buckets such as:

• Next Day;

• 2–7 days;

• 8–14 days;

• 15–30 days;

• 31 days to 2 months;

• over 2 months to 3 months;

• over 3 months to 6 months;

• over 6 months to 1 year;

• over 1 year to 3 years;

• over 3 years to 5 years; and

• over 5 years.

Short-term buckets receive special attention because near-term liquidity deficiencies can become critical very quickly.

Positive and Negative Liquidity Gap

If expected inflows in a time bucket are higher than expected outflows, the bank has a positive liquidity gap for that period.

If expected outflows are higher, there is a negative liquidity gap.

A negative gap does not automatically mean the bank is insolvent.

It means the bank must identify sufficient funding or liquid resources to cover that timing mismatch.

Cumulative Gap

Banks also monitor the running effect of mismatches across successive time buckets.

This helps identify whether an early liquidity shortage:

• disappears later;

• continues; or

• becomes progressively larger.

RBI Short-Term Mismatch Limits

Under the current Commercial Banks ALM Directions, the net cumulative negative mismatch must not exceed the following percentages of cumulative cash outflows:

RBI requires particular focus on mismatches up to 30 days, while banks must also establish Board/RMC-approved internal prudential limits across the other time buckets.

Contractual Maturity vs Behavioural Maturity

A balance-sheet item does not always behave according to its legal maturity.

Contractual Behaviour

A term deposit may have a stated maturity date.

A loan may have a stated repayment schedule.

Actual Behaviour

In practice:

• some deposits may be renewed;

• some deposits may be withdrawn early;

• customers may maintain stable balances in current or savings accounts;

• loans may be prepaid;

• committed limits may suddenly be drawn; and

• contingent obligations may crystallise.

RBI therefore requires banks to incorporate realistic behavioural assumptions and periodically validate those assumptions. Under the current directions, variance analysis must be carried out at least once in six months to test behavioural assumptions.

This is why liquidity management is not merely a mechanical reading of contractual maturity dates.

Stock Approach

The stock approach looks at the structure of the balance sheet at a point in time.

Instead of asking only when cash will arrive or leave, it asks questions such as:

• How dependent is the bank on volatile liabilities?

• How much of total assets is funded by stable core deposits?

• How much of the balance sheet is tied up in relatively illiquid assets?

• How much liquid asset cover exists against volatile funding?

RBI lists several illustrative liquidity ratios, including measures relating:

• volatile liabilities to earning assets;

• core deposits to total assets;

• relatively illiquid assets to total assets;

• illiquid assets to core deposits;

• temporary/liquid assets to total assets;

• temporary assets to volatile liabilities; and

• volatile liabilities to total assets.

Banks may set Board-approved internal limits for these measures according to their own risk profile, capabilities and experience.

How to Interpret Stock Ratios

A higher core-deposit proportion generally indicates greater dependence on stable funding.

A higher volatile-liability proportion indicates greater refinancing or withdrawal risk.

A higher liquid-assets-to-volatile-liabilities ratio indicates stronger immediate coverage.

However, holding excessive liquid assets can reduce earnings because highly liquid assets may yield less than loans or longer-term investments.

Therefore, liquidity management involves a trade-off:

Safety versus Profitability

Flow Approach vs Stock Approach

Neither approach is sufficient by itself.

A bank may have a healthy-looking stock ratio but still face a severe short-term maturity mismatch.

Stress Testing

Normal cash-flow assumptions may fail during stress.

Possible events include:

• sudden withdrawal of deposits;

• loss of wholesale funding;

• inability to roll over borrowings;

• collateral calls;

• drawdown of unused credit lines;

• decline in market liquidity; and

• difficulty selling securities without loss.

RBI requires banks to conduct liquidity stress tests and use the results to adjust policies, positions and contingency arrangements.

This converts liquidity measurement from a normal-business exercise into a resilience assessment.

Liquidity Buffer and Contingency Funding

Banks should maintain a cushion of unencumbered high-quality liquid assets that can be monetised during stress.

They should also maintain a Contingency Funding Plan (CFP) identifying:

• alternative funding sources;

• responsibilities;

• escalation procedures; and

• actions under different stress scenarios.

A funding source that is available in normal conditions may disappear precisely when liquidity is most needed. Therefore, contingency planning cannot assume uninterrupted market access.

LCR and NSFR as Complementary Measures

Modern liquidity management also includes Basel liquidity standards.

Liquidity Coverage Ratio

LCR focuses on short-term resilience.

Under the current RBI Commercial Banks ALM Directions, applicable banks must maintain a minimum LCR of 100% on an ongoing basis, meaning sufficient HQLA relative to stressed net cash outflows over the next 30 calendar days.

Net Stable Funding Ratio

NSFR addresses longer-term structural funding.

Applicable banks must maintain a minimum NSFR of 100% on an ongoing basis, comparing available stable funding with required stable funding over a one-year horizon.

For this topic, remember their role:

SLS → timing of cash-flow mismatches

Stock ratios → structure of balance-sheet liquidity

LCR → 30-day stress resilience

NSFR → one-year stable-funding resilience

They are complementary rather than substitutes.

Practical Banking Application

Consider a bank experiencing rapid loan growth.

Loans are increasing faster than deposits.

The bank may initially meet the difference through:

• wholesale deposits;

• Certificates of Deposit;

• inter-bank borrowings; or

• other short-term market funding.

Profitability may remain strong, but the balance sheet can become more vulnerable because:

• more assets are locked into longer maturities;

• dependence on volatile funding increases;

• short-term refinancing becomes necessary; and

• a market disruption could prevent funding rollover.

A sound liquidity assessment would therefore examine:

Sources of Funds → Uses of Funds → Timing Mismatch → Balance-Sheet Structure → Stress Capacity

Management may respond by:

• mobilising more stable deposits;

• extending funding tenor;

• holding more unencumbered liquid assets;

• moderating asset growth;

• diversifying funding sources; or

• reducing short-term maturity concentrations.

CAIIB Exam Focus

1. Liquidity Is Not the Same as Solvency

A solvent bank can still experience a liquidity problem if it cannot obtain cash when obligations fall due.

2. Funding Risk and Market Liquidity Risk Are Different

One concerns obtaining funds; the other concerns monetising assets or positions.

3. Assets Can Be Sources of Liquidity

Loan repayments and investment maturities create inflows, while marketable assets may be sold or used as collateral.

4. Liabilities Are Both Funding Sources and Future Uses

A deposit brings cash when received but creates an outflow obligation when withdrawn or matured.

5. Flow Approach Focuses on Timing

Place expected inflows and outflows into the correct maturity buckets.

6. Remember the Current Short-Term Limits

5 – 10 – 15 – 20

for:

Next Day → 2–7 → 8–14 → 15–30 days.

7. Behavioural Cash Flow May Differ from Contractual Maturity

Premature deposit withdrawals, loan prepayments and embedded options matter.

8. Stock Approach Examines Balance-Sheet Structure

Core deposits, volatile liabilities and liquid assets are important indicators.

9. Liquidity and Profitability Can Conflict

Holding more liquidity improves resilience but may reduce earning-asset utilisation.

10. LCR and NSFR Do Not Replace ALM Gap Analysis

They complement structural liquidity and other risk-management tools.

Common Exam Traps

Trap 1: “A Bank with More Assets than Liabilities Cannot Have Liquidity Risk”

Wrong. Timing and marketability matter.

Trap 2: “Deposits Are Only a Source of Liquidity”

Wrong. They create liquidity when raised but become uses of liquidity when withdrawn or matured.

Trap 3: “All Loans Are Illiquid until Final Maturity”

Wrong. Scheduled principal and interest repayments create intermediate inflows.

Trap 4: “Contractual Maturity Is Always the Correct Cash-Flow Date”

Wrong. Behavioural characteristics and embedded options may change actual liquidity timing.

Trap 5: “A Negative Gap Means the Bank Is Insolvent”

Wrong. It indicates a liquidity funding requirement for that time horizon.

Trap 6: “Only the Individual Gap Matters”

Wrong. Cumulative mismatches are also important.

Trap 7: “The RBI Short-Term Buckets Still End at 28 Days”

Outdated for the current commercial-bank framework. The current first four buckets include 15–30 days.

Trap 8: “A Highly Liquid Balance Sheet Is Always More Profitable”

Wrong. Excess liquidity can create an opportunity cost because funds may be held in lower-yielding assets.

Trap 9: “LCR Measures Long-Term Stable Funding”

Wrong. LCR addresses a 30-day stress horizon; NSFR addresses stable funding over a one-year horizon.

Memory Technique

Remember:

S – U – T – S

• Sources – Where will cash come from?

• Uses – Where will cash go?

• Timing – When will each flow occur?

• Stress – What happens if normal assumptions fail?

For RBI short-term mismatch limits, remember:

1–5, 7–10, 14–15, 30–20

Meaning:

• Next Day → 5%

• 2–7 days → 10%

• 8–14 days → 15%

• 15–30 days → 20%