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Default risk in an interconnected banking system with endogeneous asset markets

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  • Bluhm, Marcel
  • Krahnen, Jan Pieter

Abstract

This paper analyzes the emergence of systemic risk in a network model of interconnected bank balance sheets. Given a shock to asset values of one or several banks, systemic risk in the form of multiple bank defaults depends on the strength of balance sheets and asset market liquidity. The price of bank assets on the secondary market is endogenous in the model, thereby relating funding liquidity to expected solvency - an important stylized fact of banking crises. Based on the concept of a system value at risk, Shapley values are used to define the systemic risk charge levied upon individual banks. Using a parallelized simulated annealing algorithm the properties of an optimal charge are derived. Among other things we find that there is not necessarily a correspondence between a bank's contribution to systemic risk - which determines its risk charge - and the capital that is optimally injected into it to make the financial system more resilient to systemic risk. The analysis has policy implications for the design of optimal bank levies. --

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Bibliographic Info

Paper provided by Center for Financial Studies (CFS) in its series CFS Working Paper Series with number 2011/19.

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Date of creation: 2011
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Handle: RePEc:zbw:cfswop:201119

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Related research

Keywords: Systemic Risk; Systemic Risk Charge; Systemic Risk Fund; Macroprudential Supervision; Shapley Value; Financial Network;

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References

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  1. Juan Sole & Marco A Espinosa-Vega, 2010. "Cross-Border Financial Surveillance," IMF Working Papers 10/105, International Monetary Fund.
  2. Dimitrios P Tsomocos & Gunnar Bardsen, 2006. "Evaluation of macroeconomic models for financial stability analysis," Economics Series Working Papers 2006-FE-01, University of Oxford, Department of Economics.
  3. Lehar, Alfred, 2005. "Measuring systemic risk: A risk management approach," Journal of Banking & Finance, Elsevier, vol. 29(10), pages 2577-2603, October.
  4. Helmut Elsinger & Alfred Lehar & Martin Summer, 2006. "Risk Assessment for Banking Systems," Management Science, INFORMS, vol. 52(9), pages 1301-1314, September.
  5. Rodrigo Cifuentes & Hyun Song Shin & Gianluigi Ferrucci, 2005. "Liquidity Risk and Contagion," Journal of the European Economic Association, MIT Press, vol. 3(2-3), pages 556-566, 04/05.
  6. Castiglionesi, F. & Navarro, N., 2007. "Optimal Fragile Financial Networks," Discussion Paper 2007-100, Tilburg University, Center for Economic Research.
  7. Gary B. Gorton, 2009. "Information, Liquidity, and the (Ongoing) Panic of 2007," NBER Working Papers 14649, National Bureau of Economic Research, Inc.
  8. David Aikman & Piergiorgio Alessandri & Bruno Eklund & Prasanna Gai & Sujit Kapadia, & Elizabeth Martin, & Nada Mora & Gabriel Sterne & Matthew Willison, 2011. "Funding Liquidity Risk in a Quantitative Model of Systemic Stability," Central Banking, Analysis, and Economic Policies Book Series, in: Rodrigo Alfaro (ed.), Financial Stability, Monetary Policy, and Central Banking, edition 1, volume 15, chapter 12, pages 371-410 Central Bank of Chile.
  9. Claudio Borio, 2008. "The financial turmoil of 2007-?: a preliminary assessment and some policy considerations," BIS Working Papers 251, Bank for International Settlements.
  10. Markus K. Brunnermeier, 2009. "Deciphering the Liquidity and Credit Crunch 2007-2008," Journal of Economic Perspectives, American Economic Association, vol. 23(1), pages 77-100, Winter.
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Cited by:
  1. Christian Weistroffer, 2011. "Identifying Systemically Important Financial Institutions (SIFIs)," Working Papers id:4383, eSocialSciences.
  2. Krahnen, Jan Pieter, 2013. "Rescue by regulation? Key points of the Liikanen report," SAFE White Paper Series 9, Research Center SAFE - Sustainable Architecture for Finance in Europe, Goethe University Frankfurt.

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