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Procyclicality and Bank Portfolio Risk Level under a Constant Leverage Ratio

Author

Listed:
  • Olivier Bruno

    (GREDEG CNRS
    University of Nice Sophia Antipolis, France)

  • Alexandra Girod

    (GREDEG CNRS)

Abstract
We investigate the impact the risk sensitive regulatory ratio may have on banks' risk taking behaviours during the business cycle. We show that the risk sensitivity of capital requirements introduce by Basel II adds either an "equity surplus" or an "equity deficit" on a bank that owns a fixed capital endowment and a constant leverage ratio. Depending on the magnitude of cyclical variations into requirements, the "surplus" may be exploited by the bank to increase its value toward the selection of a riskier asset or the "deficit" may restrict the bank to opt for a less risky asset. Whether the optimal asset risk level swings among classes of risk through the cycle, the risk level of bank's portfolio may increase during economic upturns, or decrease in downturns, leading to a rise in financial fragility or a "fly to quality" phenomenon.

Suggested Citation

  • Olivier Bruno & Alexandra Girod, 2013. "Procyclicality and Bank Portfolio Risk Level under a Constant Leverage Ratio," GREDEG Working Papers 2013-35, Groupe de REcherche en Droit, Economie, Gestion (GREDEG CNRS), Université Côte d'Azur, France.
    • Handle: RePEc:gre:wpaper:2013-35
    Note: To request an electronic copy of this paper, please email the author at bruno@gredeg.cnrs.fr
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    References listed on IDEAS

    as
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    More about this item

    Keywords

    Bank capital; Basel capital accord; risk incentive;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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