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Strategic Selection of Risk Models and Bank Capital Regulation

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  • Jean-Edouard Colliard

    (Finance Department, HEC Paris, 78351 Jouy-en-Josas, France)

Abstract

The regulatory use of banks’ internal models makes capital requirements more risk sensitive but invites regulatory arbitrage. I develop a framework to study bank regulation with strategic selection of risk models. A bank supervisor can discourage arbitrage by auditing risk models and implements capital ratios less risk sensitive than in the first-best to reduce auditing costs. The optimal capital ratios of a national supervisor can be different from those set by supranational authorities, in which case the supervisor optimally tolerates biased models. I discuss the empirical implications of this “hidden model” problem, and policy answers such as leverage ratios and more reliance on backtesting mechanisms. The online appendix is available at https://doi.org/10.1287/mnsc.2017.2898 . This paper was accepted by Amit Seru, finance.

Suggested Citation

  • Jean-Edouard Colliard, 2019. "Strategic Selection of Risk Models and Bank Capital Regulation," Management Science, INFORMS, vol. 67(6), pages 2591-2606, June.
  • Handle: RePEc:inm:ormnsc:v:65:y:2019:i:6:p:2591-2606
    DOI: 10.1287/mnsc.2017.2898
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    Cited by:

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    3. Evren Ors, 2020. "Discussion of Becker, Bos, and Roszbach," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 52(S1), pages 143-147, October.
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    5. Ding, Haina & Guembel, Alexander & Ozanne, Alessio, 2020. "Market Information in Banking Supervision: The Role of Stress Test Design," TSE Working Papers 20-1144, Toulouse School of Economics (TSE).

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    More about this item

    Keywords

    Basel risk weights; internal risk models; leverage ratio; supervisory audits;
    All these keywords.

    JEL classification:

    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D84 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Expectations; Speculations
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
    • G38 - Financial Economics - - Corporate Finance and Governance - - - Government Policy and Regulation

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