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Similarity and Clustering of Banks: Application to the Credit Exposures of the Czech Banking Sector

Author

Listed:
  • Josef Brechler
  • Vaclav Hausenblas
  • Zlatuse Komarkova
  • Miroslav Plasil

Abstract

After the recent events in the global financial system there has been significant progress in the literature focusing on the sources of systemic importance of financial institutions. However, the concept of systemic importance is in practice often simplified to the problem of size and contagion due to interbank market interconnectedness. Against this backdrop, we explore additional features of systemic importance stemming from similarities between bank asset portfolios and investigate whether they can contribute to the build-up of systemic risks. We propose a set of descriptive methods to address this aspect empirically in the context of the Czech banking system. Our main findings suggest that the overall measure of the portfolio similarity of individual banks is relatively stable over time and is driven mainly by large and well-established banks. However, we identified several clusters of very similar banks whose market share is small individually but which could become systemically important when considered as a group. After taking into account the credit risk characteristics of portfolios we conclude that the importance of these clusters is even higher.

Suggested Citation

  • Josef Brechler & Vaclav Hausenblas & Zlatuse Komarkova & Miroslav Plasil, 2014. "Similarity and Clustering of Banks: Application to the Credit Exposures of the Czech Banking Sector," Research and Policy Notes 2014/04, Czech National Bank.
  • Handle: RePEc:cnb:rpnrpn:2014/04
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    References listed on IDEAS

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    1. Ivan Alves & Stijn Ferrari & Pietro Franchini & Jean-Cyprien Heam & Pavol Jurca & Sam Langfield & Sebastiano Laviola & Franka Liedorp & Antonio Sánchez & Santiago Tavolaro & Guillaume Vuillemey, 2013. "The structure and resilience of the European interbank market," ESRB Occasional Paper Series 03, European Systemic Risk Board.
    2. Wagner, Wolf, 2010. "Diversification at financial institutions and systemic crises," Journal of Financial Intermediation, Elsevier, vol. 19(3), pages 373-386, July.
    3. Drehmann, Mathias & Tarashev, Nikola, 2013. "Measuring the systemic importance of interconnected banks," Journal of Financial Intermediation, Elsevier, vol. 22(4), pages 586-607.
    4. Siem Jan Koopman & André Lucas & Bernd Schwaab, 2012. "Dynamic Factor Models With Macro, Frailty, and Industry Effects for U.S. Default Counts: The Credit Crisis of 2008," Journal of Business & Economic Statistics, Taylor & Francis Journals, vol. 30(4), pages 521-532, May.
    5. Acharya, Viral V. & Yorulmazer, Tanju, 2007. "Too many to fail--An analysis of time-inconsistency in bank closure policies," Journal of Financial Intermediation, Elsevier, vol. 16(1), pages 1-31, January.
    6. World Bank, 2012. "The World Bank Annual Report 2012," World Bank Publications, The World Bank, number 11846, December.
    7. Viral V. Acharya & Tanju Yorulmazer, 2008. "Information Contagion and Bank Herding," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 40(1), pages 215-231, February.
    8. Helmut Elsinger & Alfred Lehar & Martin Summer, 2006. "Risk Assessment for Banking Systems," Management Science, INFORMS, vol. 52(9), pages 1301-1314, September.
    9. Lando, David & Nielsen, Mads Stenbo, 2010. "Correlation in corporate defaults: Contagion or conditional independence?," Journal of Financial Intermediation, Elsevier, vol. 19(3), pages 355-372, July.
    10. World Bank, 2012. "The World Bank Annual Report 2012," World Bank Publications, The World Bank, number 11845, December.
    11. Zlatuse Komarkova & Vaclav Hausenblas & Jan Frait, 2012. "How To Identify Systemically Important Financial Institutions," Occasional Publications - Chapters in Edited Volumes, in: CNB Financial Stability Report 2011/2012, chapter 0, pages 100-111, Czech National Bank.
    12. World Bank, 2012. "The World Bank Annual Report 2012," World Bank Publications, The World Bank, number 11844, December.
    13. Hausenblas, Václav & Kubicová, Ivana & Lešanovská, Jitka, 2015. "Contagion risk in the Czech financial system: A network analysis and simulation approach," Economic Systems, Elsevier, vol. 39(1), pages 156-180.
    14. Markus Brunnermeier & Laurent Clerc & Yanis El Omari & Silvia Gabrieli & Steffen Kern & Christoph Memmel & Tuomas Peltonen & Natalia Podlich & Martin Scheicher & Guillaume Vuillemey, 2013. "Assessing contagion risks from the CDS market," ESRB Occasional Paper Series 04, European Systemic Risk Board.
    15. Adam Gersl & Petr Jakubik & Tomas Konecny & Jakub Seidler, 2012. "Dynamic Stress Testing: The Framework for Testing Banking Sector Resilience Used by the Czech National Bank," Working Papers 2012/11, Czech National Bank.
    16. Koopman, Siem Jan & Lucas, André & Schwaab, Bernd, 2011. "Modeling frailty-correlated defaults using many macroeconomic covariates," Journal of Econometrics, Elsevier, vol. 162(2), pages 312-325, June.
    17. Langfield, Sam & Liu, Zijun & Ota, Tomohiro, 2014. "Mapping the UK interbank system," Journal of Banking & Finance, Elsevier, vol. 45(C), pages 288-303.
    18. 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.
    19. Sigbjørn Atle Berg, 2011. "Systemic surcharges and measures of systemic importance," Journal of Financial Regulation and Compliance, Emerald Group Publishing, vol. 19(4), pages 383-395, November.
    20. Craig O. Brown & I. Serdar Dinç, 2011. "Too Many to Fail? Evidence of Regulatory Forbearance When the Banking Sector Is Weak," Review of Financial Studies, Society for Financial Studies, vol. 24(4), pages 1378-1405.
    21. Michael Boss & Helmut Elsinger & Martin Summer & Stefan Thurner, 2004. "Network topology of the interbank market," Quantitative Finance, Taylor & Francis Journals, vol. 4(6), pages 677-684.
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    More about this item

    Keywords

    Contagion; correlation; financial stability; systemic risk; too-many-to-fail;
    All these keywords.

    JEL classification:

    • B12 - Schools of Economic Thought and Methodology - - History of Economic Thought through 1925 - - - Classical (includes Adam Smith)
    • B52 - Schools of Economic Thought and Methodology - - Current Heterodox Approaches - - - Historical; Institutional; Evolutionary; Modern Monetary Theory;

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