Money Markets and Short-Term Funding

Introduction and Context

The money market is the segment of the financial system in which participants borrow, lend, invest, and trade highly liquid debt instruments with maturities usually not exceeding one year. It connects institutions with temporary cash surpluses to those facing short-term funding needs. Unlike capital markets, which support longer-term financing through shares and bonds, money markets focus on liquidity management, working capital, monetary policy transmission, and short-term interest-rate formation.

Banks, governments, corporations, securities dealers, insurance companies, pension funds, and money-market funds participate in this market. A treasurer may invest surplus cash overnight or for several months; a bank may borrow reserves to satisfy payment needs; and a government may issue Treasury bills to finance temporary budget requirements.

Money-market instruments are generally characterized by short maturities, relatively high liquidity, low price volatility compared with longer-term securities, and reliance on credit assessment. They are not risk-free merely because their maturities are short. Credit, liquidity, settlement, legal, operational, and interest-rate risks remain important.

Learning Objectives

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

1. Explain the economic role and structure of money markets.
2. Evaluate Treasury bills, commercial paper, certificates of deposit, repurchase agreements, interbank loans, and money-market funds.
3. Convert among discount yields, money-market yields, and bond-equivalent yields.
4. Compare instruments using liquidity, return, credit risk, collateral, maturity, and transaction costs.
5. Apply money-market instruments to corporate treasury and bank liquidity decisions.
6. Assess regulatory, ethical, technological, and governance issues in short-term funding.

1. Structure and Economic Functions of the Money Market

The money market performs four connected functions.

Liquidity transformation. It allows institutions holding temporary surplus cash to invest it while enabling others to meet immediate obligations.

Short-term credit allocation. Funds move toward governments, banks, dealers, and corporations with acceptable risk-adjusted returns.

Price discovery. Rates such as overnight interbank rates, repo rates, and Treasury-bill yields provide benchmarks for broader financial markets.

Monetary-policy transmission. Central banks influence overnight and short-term rates through policy rates, reserve operations, standing facilities, and purchases or sales of eligible securities.

The market includes primary transactions, in which an issuer first sells an instrument, and secondary transactions, in which investors trade an existing instrument. Secondary-market depth is essential: an instrument may have a short maturity but still be difficult to sell quickly without a price concession.

Core risk dimensions

A sound treasury decision evaluates the entire risk-adjusted outcome rather than selecting the highest quoted yield.

2. Major Money-Market Instruments

2.1 Treasury bills

Treasury bills (T-bills) are short-term government securities issued at a discount and redeemed at face value. They normally have maturities such as 28, 91, 182, or 364 days, although conventions differ among jurisdictions. Their credit risk is generally low when issued by a credible sovereign in its own currency, but sovereign, inflation, reinvestment, and liquidity risks remain.

A discount quote is based on face value rather than the investor’s purchase price. Under a 360-day convention:

where d is the annualized bank discount yield, F is face value, P is purchase price, and t is days to maturity. The 360-day convention is an assumption, not a universal rule.

The holding-period return on the amount invested is:

An annualized money-market yield using a 360-day basis is:

Because the discount yield divides by F while the money-market yield divides by the lower purchase price P, the money-market yield is normally higher for a positive discount.

Worked example. A 91-day T-bill with face value $1,000 is purchased for $985.

Discount yield:

d = (1,000 − 985) ÷ 1,000 × 360 ÷ 91 = 0.05934 ≈ 5.93%

Money-market yield:

m = (15 ÷ 985) × 360 ÷ 91 = 0.06020 ≈ 6.02%

The investor earns $15 on $985 for 91 days. The 6.02% money-market yield is higher than the 5.93% discount yield because it uses the invested amount as the denominator. The calculation does not imply that either quote is a guaranteed investment return after taxes, fees, or reinvestment effects.

For comparing a discount instrument with a coupon-bearing security, a commonly used bond-equivalent yield on a 365-day basis is:

This convention should be used only when the market’s quotation rules make it appropriate. Analysts must identify the day-count basis before comparing quoted rates.

2.2 Commercial paper

Commercial paper (CP) is an unsecured short-term promissory note issued primarily by financially strong corporations and financial institutions. Maturities commonly range from overnight to several months, subject to local law. CP may be issued directly to investors or through dealers.

Its principal advantages are flexible maturity and potentially lower funding cost than bank borrowing. Its limitations include:

• unsecured exposure to the issuer;
• dependence on investor confidence and market access;
• rollover risk when existing notes mature;
• sensitivity to credit-rating changes; and
• possible difficulty issuing during market stress.

A CP programme should be supported by realistic cash-flow forecasts and, where appropriate, a committed backup bank facility. A high credit rating reduces but does not eliminate default and refinancing risk.

2.3 Certificates of deposit

A certificate of deposit (CD) is a time deposit issued by a bank. Negotiable CDs can be sold in a secondary market, while retail CDs may be less transferable and may carry withdrawal penalties. The investor lends funds to the issuing bank in exchange for a stated or reference-linked return at maturity.

A CD’s assessment should include the issuing bank’s creditworthiness, deposit-insurance limits, maturity, liquidity, call or put features, and whether interest is simple or compounded. A negotiable CD may provide more liquidity than an ordinary term deposit, but its market price can fall if comparable interest rates rise.

For a simple-interest investment, maturity value can be represented as:

where P is principal, r is annual simple interest, t is the number of days, and B is the day-count basis, such as 360 or 365. This formula does not apply unchanged when interest compounds or when the instrument uses a different payment convention.

2.4 Repurchase agreements

A repurchase agreement (repo) is a transaction in which one party sells securities and simultaneously agrees to repurchase them later at a specified price. Economically, it is usually a collateralized loan. The cash borrower is often called the repo seller or collateral provider; the cash lender is the repo buyer.

For a simple repo with no interim cash flows:

The repurchase price is:

If $10,000,000 is advanced for seven days at 5.00% on a 360-day basis:

Interest = 10,000,000 × 0.05 × 7 ÷ 360 = $9,722.22

The repurchase price is therefore $10,009,722.22, ignoring fees and margin adjustments.

The lender is exposed to the counterparty and to collateral-value risk. A haircut requires the borrower to provide collateral worth more than the cash received. If the haircut is 2%, the maximum cash advanced against $10 million of securities is approximately:

Cash = 10,000,000 × (1 − 0.02) = $9,800,000

Actual market practice may define the haircut differently, so the contract must be read carefully. Margin calls, collateral eligibility, valuation frequency, substitution rights, reuse of collateral, close-out netting, and bankruptcy treatment are central issues.

A reverse repo is the same transaction viewed from the cash lender’s perspective. Repos are crucial to dealer financing and the implementation of monetary policy, but excessive dependence on short-term repo funding can create rollover and collateral-liquidity pressure.

2.5 Interbank lending

Interbank lending involves loans between banks, often overnight but sometimes for longer terms. Banks borrow to manage payment flows, reserve positions, liquidity coverage, and temporary balance-sheet mismatches. Transactions may be unsecured or secured, depending on the market and institutional framework.

An unsecured interbank rate incorporates the perceived creditworthiness of the borrower. A secured rate, such as a repo rate, is generally lower for comparable maturity when high-quality collateral is available, although collateral-management costs and legal constraints matter. In stressed conditions, the spread between unsecured and secured funding can widen sharply.

Banks should not treat access to the interbank market as guaranteed. A bank can appear solvent but still face liquidity failure if lenders refuse to roll over short-term obligations. Liquidity buffers, central-bank facilities, stable deposits, and contingency funding plans are therefore essential.

2.6 Money-market funds

A money-market fund (MMF) is an investment fund that pools investor money and invests in short-term instruments such as T-bills, CP, CDs, and repos. Investors generally receive fund shares rather than a deposit claim. The fund’s return depends on portfolio income, fees, credit events, liquidity conditions, and applicable valuation rules.

An MMF provides diversification and professional management, but it is not automatically equivalent to a bank deposit or a government guarantee. Important distinctions include government, public-debt, prime, and tax-exempt funds, depending on jurisdiction. Some funds use a variable net asset value; others may use special valuation or liquidity mechanisms permitted by regulation.

Investors should examine weighted average maturity, weighted average life, credit quality, liquidity buckets, concentration limits, fees, redemption terms, and sponsor-support history. The 2008 and 2020 market disruptions demonstrated that even short-term funds can experience redemption pressure and market-liquidity problems.

3. Comparing Quotations, Returns, and Risk

A quoted rate is meaningful only when its denominator, day-count basis, compounding convention, settlement date, and embedded fees are known. A discount quote is not directly comparable with a deposit rate or a repo rate without conversion.

Risk-adjusted comparison

Suppose an unsecured CP offers 6.20%, a repo offers 5.80%, and a T-bill offers 5.50%. The CP’s higher rate may compensate for credit and rollover risk. A treasurer should estimate expected loss and liquidity cost rather than select 6.20% automatically. A simplified expected-credit-loss concept is:

This is a risk-analysis framework, not a complete pricing model. It omits spread volatility, liquidity premiums, tax, capital usage, operational costs, and dependence between risks.

The relevant comparison may be the all-in funding cost:

For investments, the corresponding analysis considers net yield, expected loss, liquidity value, and capital or regulatory treatment.

4. Corporate Treasury Applications

Cash segmentation

A corporate treasury should segment cash into:

1. Operating cash: needed for payroll, taxes, suppliers, and daily settlement.
2. Reserve or liquidity cash: held for uncertain timing or size of cash flows.
3. Strategic or surplus cash: not expected to be required in the near term.

Operating cash should normally be invested only in highly liquid, low-risk instruments with maturities matching payment dates. Surplus cash can accept somewhat greater maturity or credit exposure, subject to policy limits.

Maturity matching and laddering

A maturity ladder spreads investments across dates so that cash becomes available when obligations fall due. It reduces concentration and reinvestment risk, but it does not eliminate market or credit risk. A treasury policy should establish eligible issuers, maximum maturities, minimum ratings, counterparty limits, settlement procedures, and escalation rules.

Funding choice

A company choosing between CP, bank credit, repo-like secured borrowing, and term deposits should assess:

• certainty of access during stress;
• total cost and fees;
• collateral availability;
• covenant restrictions;
• refinancing concentration;
• accounting and tax treatment; and
• operational capacity to manage documentation and margin calls.

Commercial paper is efficient for a highly rated issuer with predictable access to investors. A committed bank line may be more expensive but valuable as insurance. Short-term borrowing should not finance assets whose cash flows are uncertain or long-dated unless a reliable liquidity backstop exists.

5. Applied Case: Meridian Components Ltd.

This is an illustrative case.

Background and problem

Meridian Components expects to pay $8 million for inventory in 30 days. It must also reserve $2 million for wages and taxes due over the following six weeks. The treasury team has $10 million currently available. In addition, customer receipts of approximately $6 million are expected in 20 to 45 days, but their timing is uncertain. Meridian is considering a 30-day T-bill, prime MMF shares, or a 30-day investment in commercial paper. It also has an undrawn $5 million committed bank line.

The critical clarification is that the initial $10 million is not surplus: the $8 million inventory payment plus the $2 million reserve fully uses it. Only the uncertain customer receipts, or the committed facility if needed, can support additional investment. Investing the initial $10 million in a less liquid or credit-sensitive asset would expose Meridian to a funding mismatch.

Analysis

The $8 million payment is a known obligation. The $2 million reserve is a liquidity buffer, not investable surplus. The $6 million receivable forecast has timing uncertainty and should be subjected to a downside scenario. If receipts are delayed beyond day 45, Meridian may need its bank line.

A T-bill offers strong credit quality and predictable maturity, but investing money needed before maturity creates sale-price and liquidity risk. An MMF offers daily redemption in normal conditions and diversification, but redemption liquidity is not identical to guaranteed cash. CP may offer a higher yield but adds issuer concentration and market-access risk.

Approach and solution

Meridian adopts the following plan:

• Keep the $8 million inventory amount in cash or a same-day government-backed instrument maturing before day 30.
• Keep the $2 million reserve in cash, a highly liquid government MMF, or staggered very-short T-bills.
• Do not invest expected receipts until collection is sufficiently certain; if invested, use a diversified, highly liquid vehicle with a maturity no later than the expected funding need.
• Confirm the $5 million credit line, its borrowing conditions, collateral requirements, and drawdown time.
• Set issuer, maturity, and concentration limits and conduct a delayed-receipts stress test.

Outcome and learning points

The plan may sacrifice some yield relative to CP, but it protects payment capacity. The case demonstrates that liquidity classification must precede yield comparison. A treasury manager should distinguish existing cash from forecast cash, committed liquidity from uncommitted market access, and contractual obligations from estimates.

6. Regulation, Governance, Ethics, and Technology

Regulation varies by jurisdiction, but common objectives include investor protection, resilience, transparency, liquidity management, leverage control, and prevention of market abuse. Relevant controls may cover issuer disclosure, fund portfolio quality, liquidity minimums, stress testing, reporting, central clearing, margin, and eligible collateral.

Governance requires independent approval of limits, documented investment mandates, daily exposure monitoring, exception escalation, and periodic review of counterparties. Employees should not select instruments solely to maximize reported yield or performance bonuses. Misrepresenting liquidity, hiding losses, delaying recognition of failed trades, or using customer funds outside mandate is unethical and potentially unlawful.

Technology improves treasury through automated cash forecasting, straight-through processing, real-time exposure dashboards, electronic confirmations, and rules-based limit monitoring. Artificial intelligence can identify payment patterns and improve forecasts, but it introduces model risk, data-quality risk, explainability concerns, and potential cyber vulnerabilities. AI outputs should be reviewed by qualified personnel, especially when forecasts affect liquidity buffers or borrowing decisions.

7. Contemporary Developments and Limitations

Electronic trading and automated collateral management have improved speed and transparency, but fragmentation across platforms can complicate price comparison. Instant payments may reduce settlement lags while increasing the need for intraday liquidity. Tokenized deposits and other digital settlement assets may eventually alter money-market infrastructure, but legal finality, cyber resilience, operational governance, and central-bank access remain decisive questions.

Short-term markets also face structural limitations. Rates can be distorted by regulatory balance-sheet constraints, collateral scarcity, tax differences, or central-bank interventions. Historical volatility may understate extreme liquidity risk because instruments that are normally liquid can become difficult to sell simultaneously. Therefore, stress testing should include spread widening, delayed receivables, collateral haircuts, investor redemptions, counterparty downgrades, and loss of market access.

Chapter Summary

Money markets transfer short-term funds among governments, banks, corporations, dealers, and investors. Treasury bills are generally high-quality discount instruments, but discount yields and purchase-price yields use different denominators. Commercial paper provides flexible unsecured corporate funding but creates credit and rollover exposure. Certificates of deposit are bank liabilities whose liquidity depends on their design and marketability. Repos are collateralized financing transactions whose safety depends on collateral valuation, margining, documentation, and close-out rights. Interbank lending supports bank liquidity but can transmit stress. Money-market funds offer diversification and professional management without being identical to insured deposits.

Effective analysis requires comparison of day-count conventions, yield definitions, maturity, liquidity, credit quality, collateral, fees, and contingency access. Corporate treasurers should classify cash by purpose, match maturities to obligations, diversify counterparties, maintain committed liquidity, and stress-test uncertain receipts. Governance, ethical conduct, operational resilience, and careful use of technology are integral to sound short-term funding decisions.

Key Terms

Money market: Market for short-term borrowing, lending, and investment.

Treasury bill: Short-term government security usually issued below face value.

Face value: Amount paid to the holder at maturity.

Discount yield: Annualized return calculated using face value as the denominator.

Money-market yield: Annualized holding-period return calculated using purchase price.

Bond-equivalent yield: Annualized yield convention used to compare certain short-term instruments.

Commercial paper: Unsecured short-term promissory note issued by a corporation or financial institution.

Certificate of deposit: Bank time deposit evidencing a claim on the issuing bank.

Repurchase agreement: Sale of securities combined with an agreement to repurchase them later.

Reverse repo: Repo viewed from the cash lender’s perspective.

Haircut: Reduction applied to collateral value when determining cash advanced.

Interbank lending: Borrowing and lending between banks.

Money-market fund: Pooled investment fund holding short-term assets.

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

Liquidity risk: Risk of failing to obtain cash or sell assets when required.

Counterparty risk: Risk that the other party fails to perform.

Maturity ladder: Schedule distributing investments or liabilities across maturity dates.

Committed credit line: Contractual borrowing facility available subject to stated conditions.

Day-count convention: Rule specifying how interest accrues over time.

Expected credit loss: Estimated loss based on default probability, loss severity, and exposure.

Review Questions

Short Answer Questions

1. Why is a money-market yield normally higher than a Treasury-bill discount yield for the same bill?
2. What distinguishes commercial paper from a certificate of deposit?
3. Explain the economic substance of a repurchase agreement.
4. Why is a money-market fund not automatically equivalent to an insured bank deposit?
5. What is rollover risk, and why is it important to a corporate issuer?

Long Answer Questions

1. Compare Treasury bills, commercial paper, CDs, repos, interbank loans, and MMFs using return, liquidity, credit risk, and collateral.
2. Explain how a bank’s liquidity problems can affect interbank rates and repo markets.
3. Discuss the importance of day-count conventions and denominators in short-term yield quotations.
4. Design a corporate treasury policy for operating cash, reserve cash, and surplus cash.
5. Evaluate the governance, ethical, and operational controls required for money-market investment.

Analytical / Application Questions

1. A 182-day T-bill has a face value of $1,000 and sells for $975. Calculate its discount yield and 360-day money-market yield. Explain why the results differ.
2. A company must pay $12 million in 25 days but expects a $10 million customer receipt in 40 days. Evaluate whether it should invest its current cash in CP, a T-bill, or an MMF.
3. A dealer funds a securities portfolio through seven-day repos. Analyze the effects of a 3% collateral haircut, a 1.5-percentage-point rise in repo rates, and a refusal by lenders to roll over half the funding.

Multiple Choice Questions with Answers

Question 1

A 91-day Treasury bill has a face value of $1,000 and a purchase price of $985. Using a 360-day basis, what is its approximate bank discount yield?

A. 5.93%

B. 6.02%

C. 5.50%

D. 6.53%

Correct Answer: A. 5.93%

Question 2

For the same $1,000 Treasury bill bought for $985, what is the approximate 360-day money-market yield?

A. 5.93%

B. 6.02%

C. 5.00%

D. 6.53%

Correct Answer: B. 6.02%

Question 3

Which instrument is normally an unsecured short-term promise issued by a corporation?

A. Commercial paper

B. Repurchase agreement

C. Treasury bill

D. Reverse repo

Correct Answer: A. Commercial paper

Question 4

In a repo, the party receiving cash generally provides:

A. Equity shares permanently transferred without repurchase rights

B. Eligible securities as collateral

C. An insurance policy only

D. A demand deposit claim

Correct Answer: B. Eligible securities as collateral

Question 5

A 2% haircut is applied to $10 million of securities. Under the convention that cash equals collateral value times one minus the haircut, how much cash can be advanced?

A. $10.20 million

B. $10.00 million

C. $9.80 million

D. $9.20 million

Correct Answer: C. $9.80 million

Question 6

An investment earns $9 on a purchase price of $991 over the stated holding period. What is the holding-period return, rounded to two decimals?

A. 0.91%

B. 0.09%

C. 9.00%

D. 1.10%

Correct Answer: A. 0.91%

Question 7

Which risk is most directly associated with the inability to renew maturing commercial paper?

A. Rollover risk

B. Settlement risk

C. Inflation-indexation risk

D. Underwriting risk

Correct Answer: A. Rollover risk

Question 8

Which statement about a money-market fund is most accurate?

A. It is always a government-insured deposit

B. It holds only long-term corporate bonds

C. It pools investor money in short-term assets and may face redemption and portfolio risks

D. It guarantees a fixed return regardless of asset performance

Correct Answer: C. It pools investor money in short-term assets and may face redemption and portfolio risks

Question 9

If $10 million is advanced for seven days at a 5% simple repo rate using a 360-day basis, approximate repo interest is:

A. $9,722.22

B. $35,000

C. $50,000

D. $972.22

Correct Answer: A. $9,722.22

Question 10

Meridian has $10 million, must pay $8 million for inventory, and must reserve $2 million for wages and taxes. What is the most defensible conclusion?

A. The full $10 million is genuine surplus cash

B. The $10 million is committed to known needs and is not genuine surplus

C. The company should invest the $2 million reserve in unsecured CP

D. Expected receipts are equivalent to cash already held

Correct Answer: B. The $10 million is committed to known needs and is not genuine surplus