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Banks and Sovereigns: A Model of Mutual Contagion

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  • Gruber, Alexander
  • Kogler, Michael

Abstract

The recent crisis has revealed that bank and sovereign risks are inherently intertwined. This paper develops a model of the bank-sovereign nexus to identify the main spillovers and to study the implications of guarantees and capital regulation. We show how banks’ asset risk may trigger a sovereign default through taxation and deposit insurance. The latter can be contagious because of its cost or stabilizing by avoiding liquidation losses. Since sovereign risks receive preferential regulatory treatment, banks purchase government bonds. This creates the opportunity for adverse feedback loops such that a sovereign default is the very reason for bank failure.

Suggested Citation

  • Gruber, Alexander & Kogler, Michael, 2016. "Banks and Sovereigns: A Model of Mutual Contagion," Economics Working Paper Series 1614, University of St. Gallen, School of Economics and Political Science.
    • Handle: RePEc:usg:econwp:2016:14
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    References listed on IDEAS

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    More about this item

    Keywords

    Sovereign Debt Crisis; Financial Risk; Contagion; Deposit Insurance;
    All these keywords.

    JEL classification:

    • G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
    • 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
    • H63 - Public Economics - - National Budget, Deficit, and Debt - - - Debt; Debt Management; Sovereign Debt

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