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Collective Moral Hazard and the Interbank Market

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Abstract

The concentration of risk within financial system is considered to be a source of systemic instability. We propose a theory to explain the structure of the financial system and show how it alters the risk taking incentives of financial institutions. We build a model of portfolio choice and endogenous contracts in which the government optimally intervenes during crises. By issuing financial claims to other institutions, relatively risky institutions endogenously become large and interconnected. This structure enables institutions to share the risk of systemic crisis in a privately optimal way, but channels funds to relatively risky investments and creates incentives even for smaller institutions to take excessive risks. Constrained efficiency can be implemented with macroprudential regulation designed to limit the interconnectedness of risky institutions.

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  • Levent Altinoglu & Joseph E. Stiglitz, 2020. "Collective Moral Hazard and the Interbank Market," Finance and Economics Discussion Series 2020-098, Board of Governors of the Federal Reserve System (U.S.).
    • Handle: RePEc:fip:fedgfe:2020-98
    DOI: 10.17016/FEDS.2020.098
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    Cited by:

    1. Verberi, Can & Yasar, Sema & Sugozu, Ibrahim Halil, 2023. "Capital liberalization, growth and moral hazard: Lessons from the global financial crisis," International Review of Financial Analysis, Elsevier, vol. 90(C).
    2. Capponi, Agostino & Corell, Felix & Stiglitz, Joseph E., 2022. "Optimal bailouts and the doom loop with a financial network," Journal of Monetary Economics, Elsevier, vol. 128(C), pages 35-50.

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    More about this item

    Keywords

    Systemic risk; systemically important financial institutions (SIFI); Interbank markets; Financial crises; Bailouts; Macroprudential supervision;
    All these keywords.

    JEL classification:

    • E61 - Macroeconomics and Monetary Economics - - Macroeconomic Policy, Macroeconomic Aspects of Public Finance, and General Outlook - - - Policy Objectives; Policy Designs and Consistency; Policy Coordination
    • G01 - Financial Economics - - General - - - Financial Crises
    • G18 - Financial Economics - - General Financial Markets - - - Government Policy and Regulation
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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