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Monetary policy implementation in an interbank network: Effects on systemic risk

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  • Bluhm, Marcel
  • Faia, Ester
  • Krahnen, Jan Pieter

Abstract

This paper makes a conceptual contribution to the e ffect of monetary policy on financial stability. We develop a microfounded network model with endogenous network formation to analyze the impact of central banks' monetary policy interventions on systemic risk. Banks choose their portfolio, including their borrowing and lending decisions on the interbank market, to maximize profit subject to regulatory constraints in an asset-liability framework. Systemic risk arises in the form of multiple bank defaults driven by common shock exposure on asset markets, direct contagion via the interbank market, and firesale spirals. The central bank injects or withdraws liquidity on the interbank markets to achieve its desired interest rate target. A tension arises between the bene ficial effects of stabilized interest rates and increased loan volume and the detrimental effects of higher risk taking incentives.We fi nd that central bank supply of liquidity quite generally increases systemic risk. --

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Bibliographic Info

Paper provided by Research Center SAFE - Sustainable Architecture for Finance in Europe, Goethe University Frankfurt in its series SAFE Working Paper Series with number 46.

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Date of creation: 2014
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Handle: RePEc:zbw:safewp:46

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Keywords: network formation; contagion; central banks' interventions;

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  1. Hans Degryse & Grégory Nguyen, 2007. "Interbank Exposures: An Empirical Examination of Contagion Risk in the Belgian Banking System," International Journal of Central Banking, International Journal of Central Banking, vol. 3(2), pages 123-171, June.
  2. Hamilton, James D, 1996. "The Daily Market for Federal Funds," Journal of Political Economy, University of Chicago Press, vol. 104(1), pages 26-56, February.
  3. Leonardo Bartolini & Giuseppe Bertola & Alessandro Prati, 2000. "Day-to-day monetary policy and the volatility of the federal funds interest rate," Staff Reports 110, Federal Reserve Bank of New York.
  4. Nikola Tarashev & Claudio Borio & Kostas Tsatsaronis, 2009. "The systemic importance of financial institutions," BIS Quarterly Review, Bank for International Settlements, September.
  5. Olivier J. Blanchard & Giovanni Dell'Ariccia & Paolo Mauro, 2013. "Rethinking Macro Policy II," IMF Staff Discussion Notes 13/003, International Monetary Fund.
  6. Kiyotaki, Nobuhiro & Moore, John, 1997. "Credit Cycles," Journal of Political Economy, University of Chicago Press, vol. 105(2), pages 211-48, April.
  7. Bernanke, Ben & Gertler, Mark, 1989. "Agency Costs, Net Worth, and Business Fluctuations," American Economic Review, American Economic Association, vol. 79(1), pages 14-31, March.
  8. Helmut Elsinger & Alfred Lehar & Martin Summer, 2002. "Risk Assessment for Banking Systems," Working Papers 79, Oesterreichische Nationalbank (Austrian Central Bank).
  9. Ignazio Angeloni & Alessandro Prati, 1996. "The identification of liquidity effects in the EMS: Italy 1991–1992," Open Economies Review, Springer, vol. 7(3), pages 275-293, July.
  10. Georg, Co-Pierre, 2011. "The effect of the interbank network structure on contagion and common shocks," Discussion Paper Series 2: Banking and Financial Studies 2011,12, Deutsche Bundesbank, Research Centre.
  11. Gauthier, Céline & Lehar, Alfred & Souissi, Moez, 2012. "Macroprudential capital requirements and systemic risk," Journal of Financial Intermediation, Elsevier, vol. 21(4), pages 594-618.
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