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Bank Overleverage and Macroeconomic Fragility

Author

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  • Ryo Kato

    (Director and Senior Economist, Institute for Monetary and Economic Studies, Bank of Japan (E-mail: ryou.katou@boj.or.jp))

  • Takayuki Tsuruga

    (Associate Professor, Graduate School of Economics, Kyoto University, (E-mail: tsuruga@econ.kyoto-u.ac.jp))

Abstract

This paper develops a dynamic general equilibrium model that explicitly includes a banking sector with a maturity mismatch. We demonstrate that, despite the perfect competition in the banking sector, rational banks take on excessive risks systemically, resulting in overleverage and inefficiently high crisis probabilities. The model accounts for the banks' rational over-optimism regarding future capital prices which arises from pecuniary externalities on their own solvency. Using the model as an example, we introduce MSR (marginal systemic risk) as a general measure to assess the macroeconomic exposure to systemic risks.

Suggested Citation

  • Ryo Kato & Takayuki Tsuruga, 2011. "Bank Overleverage and Macroeconomic Fragility," IMES Discussion Paper Series 11-E-15, Institute for Monetary and Economic Studies, Bank of Japan.
    • Handle: RePEc:ime:imedps:11-e-15
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    File URL: http://www.imes.boj.or.jp/research/papers/english/11-E-15.pdf
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    References listed on IDEAS

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    Cited by:

    1. Keiichiro Kobayashi & Tomoyuki Nakajima, 2014. "A macroeconomic model of liquidity crises," KIER Working Papers 876, Kyoto University, Institute of Economic Research.
    2. Kosuke Aoki & Nao Sudo, 2012. "Asset Portfolio Choice of Banks and Inflation Dynamics," Bank of Japan Working Paper Series 12-E-5, Bank of Japan.
    3. Olivier Jeanne & Anton Korinek, 2020. "Macroprudential Regulation versus mopping up after the crash," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 87(3), pages 1470-1497.
    4. Kato, Ryo & Tsuruga, Takayuki, 2016. "The safer, the riskier: A model of financial instability and bank leverage," Economic Modelling, Elsevier, vol. 52(PA), pages 71-77.

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    More about this item

    Keywords

    Financial crisis; Liquidity shortage; Maturity mismatch; Pecuniary externalities;
    All these keywords.

    JEL classification:

    • E3 - Macroeconomics and Monetary Economics - - Prices, Business Fluctuations, and Cycles
    • G01 - Financial Economics - - General - - - Financial Crises
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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