Unit 37: Interbank Markets and Bank Funding

Where This Unit Fits

This unit follows Unit 36: Asset–Liability Management and Interest Rate Risk by moving from internal balance sheet sensitivity into the external funding markets and institutional relationships banks use to obtain liquidity and support short-term and strategic funding needs.

While asset–liability management focuses on how a bank structures its own balance sheet, interbank markets and bank funding focus on how the institution interacts with other banks, money markets, and central bank mechanisms to borrow funds, place surplus liquidity, and support settlement activity.

Students now examine the market channels, counterparties, funding instruments, and institutional infrastructures that connect banks to the wider financial system.

Unit Overview

Banks do not rely only on customer deposits for funding. They also access short-term and wholesale funding through interbank markets, repurchase agreements, correspondent networks, and central bank facilities. These channels help banks manage cash needs, support payment activity, and stabilize operations during changing market conditions.

This unit introduces the operational mechanics of interbank funding by examining repo markets, unsecured interbank lending, correspondent banking relationships, wholesale funding structures, and official liquidity backstops.

Students learn how banks use these channels to move liquidity across institutions, obtain secured or unsecured funding, maintain settlement capacity, and respond to periods of financial stress or market tightening.

Why This Matters in Banking Operations

Modern banks operate within a highly connected funding system. Even banks with strong deposit franchises often depend on interbank and wholesale channels for flexibility, short-term liquidity balancing, collateralized financing, and contingency support.

Weak access to funding markets can create immediate operational and financial strain. A bank that cannot roll over short-term funding, access correspondent networks, or obtain liquidity from secure sources may face payment pressure, reduced flexibility, and broader confidence concerns.

In practical terms, this unit helps students understand how banks connect to money markets and institutional funding channels, why those channels matter for financial stability, and how market access affects day-to-day treasury and liquidity operations.

What You’ll Learn

Core Concepts

• How banks use repo markets and interbank lending to obtain short-term funding
• Why wholesale funding can supplement deposits but also create sensitivity under stress
• How correspondent banking supports settlement, liquidity access, and cross-institution connectivity
• How central bank facilities provide reserve access and emergency or routine liquidity support
• Why funding diversification matters for operational and financial resilience

Operational Competencies

• Identify the main external funding channels banks use beyond deposits
• Explain the difference between secured and unsecured interbank funding
• Recognize how correspondent relationships support payment and liquidity functions
• Describe how banks use central bank facilities within broader funding management frameworks

Institutional Questions This Unit Helps Answer

• How do banks borrow from one another or from wholesale markets?
• What role do repo markets play in bank funding?
• Why is correspondent banking important to liquidity and settlement?
• How do central bank facilities support banking system stability?

Lessons in This Unit

Interbank and Market Funding Foundations

• Lesson 37.1: What Interbank Markets and Bank Funding Do

  Learn how banks access external funding channels, exchange liquidity with other institutions, and support short-term funding flexibility.

• Lesson 37.2: Repo Markets and Secured Short-Term Funding

  Study how banks use repurchase agreements, collateral, and short-term funding transactions to obtain liquid funds from market counterparties.

• Lesson 37.3: Interbank Lending and Unsecured Funding Relationships

  Examine how banks lend to and borrow from one another through unsecured markets and bilateral funding arrangements.

Institutional Networks and Official Liquidity Access

• Lesson 37.4: Wholesale Funding Structures and Market Dependence

  Understand how banks use wholesale funding sources beyond deposits and how market conditions affect availability, cost, and rollover risk.

• Lesson 37.5: Correspondent Banking and Interbank Settlement Networks

  Study how correspondent banking relationships support payments, account services, cross-border activity, and interbank liquidity movement.

• Lesson 37.6: Central Bank Facilities and Official Liquidity Support

  Learn how banks access central bank reserves, standing facilities, and official liquidity mechanisms within the broader funding system.

• Lesson 37.7: External Funding in the Banking Operating Model

  Bring together repo markets, interbank lending, correspondent banking, wholesale funding, and central bank access into a complete view of institutional bank funding.

Connected Units

• Unit 14: Payment Systems and Settlement Networks

  Revisit how settlement infrastructure and payment movement connect directly to interbank liquidity and correspondent banking relationships.

• Unit 16: Correspondent Banking and Interbank Services

  Compare operational correspondent services with the broader funding, liquidity, and institutional market relationships covered in this unit.

• Unit 35: Treasury and Liquidity Management

  Connect internal liquidity oversight with the external funding channels treasury teams use to support cash and reserve management.

Study Support

• Templates & Tools

  Use funding channel maps, repo transaction examples, liquidity flow diagrams, and wholesale funding checklists to understand interbank markets.

• Glossary Support

  Review key terms such as repo, wholesale funding, interbank lending, correspondent bank, standing facility, collateral, and rollover risk.

• Case Examples

  Study examples showing how banks respond to tightening funding markets, collateral demands, correspondent disruptions, and liquidity pressure across interbank channels.

Practical Application

By the end of this unit, students should understand how banks obtain funding through repo markets, interbank lending, wholesale channels, correspondent relationships, and central bank facilities. They should be able to explain how these funding sources support liquidity management, payment capacity, and broader institutional stability.

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