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Systemic risk in a network model of interbank markets with central bank activity

Author

Listed:
  • Co-Pierre Georg

    (Graduate School "Global Financial Markets - Stability and Change", Friedrich-Schiller-Universität Jena)

  • Jenny Poschmann

    (School of Economics and Business Administration, Friedrich-Schiller-Universität Jena)

Abstract
The breakdown of the interbank money markets in the face of the recent financial crisis has forced central banks and governments to take extraordinary measures to sustain financial stability. In this paper we investigate which influence central bank activity has on interbank markets. In our model, banks optimize a portfolio of risky investments and riskless excess reserves according to their risk and liquidity preferences. They are linked via interbank loans and face a stochastic supply of household deposits. We then introduce a central bank into the model and show that central bank activity enhances financial stability. We model the default of a large bank and analyse the resulting contagion effects. This is compared to a common shock that hits banks who have invested in similiar assets. Our results indicate that common shocks are not subordinate to contagion effects, but are instead the greater threat to systemic stability.

Suggested Citation

  • Co-Pierre Georg & Jenny Poschmann, 2010. "Systemic risk in a network model of interbank markets with central bank activity," Jena Economics Research Papers 2010-033, Friedrich-Schiller-University Jena.
    • Handle: RePEc:jrp:jrpwrp:2010-033
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    File URL: https://oweb.b67.uni-jena.de/Papers/jerp2010/wp_2010_033.pdf
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    References listed on IDEAS

    as
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    Citations

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    Cited by:

    1. P. Giudici & A. Spelta, 2016. "Graphical Network Models for International Financial Flows," Journal of Business & Economic Statistics, Taylor & Francis Journals, vol. 34(1), pages 128-138, January.
    2. Wolski, Marcin & van de Leur, Michiel, 2016. "Interbank loans, collateral and modern monetary policy," Journal of Economic Dynamics and Control, Elsevier, vol. 73(C), pages 388-416.
    3. León, C. & Sarmiento, M., 2016. "Liquidity and Counterparty Risks Tradeoff in Money Market Networks," Discussion Paper 2016-017, Tilburg University, Center for Economic Research.
    4. G. Wims & D. Martens & M. De Backer, 2011. "Network Models of Financial Contagion: A Definition and Literature Review," Working Papers of Faculty of Economics and Business Administration, Ghent University, Belgium 11/730, Ghent University, Faculty of Economics and Business Administration.
    5. Tao Xu & Jianmin He & Shouwei Li, 2016. "Multi-Channel Contagion In Dynamic Interbank Market Network," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 19(06n07), pages 1-25, September.
    6. Leventides, John & Loukaki, Kalliopi & Papavassiliou, Vassilios G., 2019. "Simulating financial contagion dynamics in random interbank networks," Journal of Economic Behavior & Organization, Elsevier, vol. 158(C), pages 500-525.
    7. León, C., 2015. "Financial stability from a network perspective," Other publications TiSEM bb2e4e44-e842-45c6-a946-4, Tilburg University, School of Economics and Management.
    8. León, Carlos & Machado, Clara & Sarmiento, Miguel, 2018. "Identifying central bank liquidity super-spreaders in interbank funds networks," Journal of Financial Stability, Elsevier, vol. 35(C), pages 75-92.
    9. Tingqiang Chen & Binqing Xiao & Haifei Liu, 2018. "Credit Risk Contagion in an Evolving Network Model Integrating Spillover Effects and Behavioral Interventions," Complexity, Hindawi, vol. 2018, pages 1-16, March.
    10. Shouwei Li & Jianmin He, 2012. "The Impact Of Bank Activities On Contagion Risk In Interbank Networks," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 15(supp0), pages 1-20.
    11. Sandoval, Leonidas Junior, 2013. "To lag or not to lag? How to compare indices of stock markets that operate at different times," Insper Working Papers wpe_319, Insper Working Paper, Insper Instituto de Ensino e Pesquisa.
    12. Nadine M Walters & Conrad Beyers & Gusti van Zyl & Rolf van den Heever, 2018. "A framework for simulating systemic risk and its application to the South African banking sector," Papers 1811.04223, arXiv.org.
    13. Nadine Walters & Gusti Van Zyl & Conrad Beyers, 2019. "Financial Contagion In Large, Inhomogeneous Stochastic Interbank Networks," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 22(02), pages 1-26, March.
    14. Shouwei Li, 2011. "Contagion Risk In An Evolving Network Model Of Banking Systems," Advances in Complex Systems (ACS), World Scientific Publishing Co. Pte. Ltd., vol. 14(05), pages 673-690.

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    More about this item

    Keywords

    systemic risk; interbank markets; monetary policy; contagion; common shocks;
    All these keywords.

    JEL classification:

    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • E52 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Monetary Policy
    • E58 - Macroeconomics and Monetary Economics - - Monetary Policy, Central Banking, and the Supply of Money and Credit - - - Central Banks and Their Policies
    • G01 - Financial Economics - - General - - - Financial Crises
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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