Contagion in financial networks: A threat index
AbstractAn intricate web of claims and obligations ties together the balance sheets of a wide variety of financial institutions. Under the occurrence of default, these interbank claims generate externalities across institutions and possibly disseminate defaults and bankruptcy. Building on a simple model for the joint determination of the repayments of interbank claims, this paper introduces a measure of the threat that a bank poses to the system. Such a measure, called threat index, may be helpful to determine how to inject cash into banks so as to increase debt reimbursement, or to assess the contributions of individual institutions to the risk in the system. Although the threat index and the default level of a bank both reflect some form of weakness and are affected by the whole liability network, the two indicators differ. As a result, injecting cash into the banks with the largest default level may not be optimal.
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Bibliographic InfoPaper provided by C.E.P.R. Discussion Papers in its series CEPR Discussion Papers with number 8793.
Date of creation: Feb 2012
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Other versions of this item:
- G01 - Financial Economics - - General - - - Financial Crises
- 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
This paper has been announced in the following NEP Reports:
- NEP-ALL-2012-03-28 (All new papers)
- NEP-BAN-2012-03-28 (Banking)
- NEP-CBA-2012-03-28 (Central Banking)
- NEP-NET-2012-03-28 (Network Economics)
- NEP-RMG-2012-03-28 (Risk Management)
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