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The Brazilian Interbank Network Structure and Systemic Risk

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  • Edson Bastos e Santos
  • Rama Cont

Abstract

We explore the structure and dynamics of interbank exposures in Brazil using a unique data set of all mutual exposures of financial institutions in Brazil, as well as their capital reserves, at various periods in 2007 and 2008. We show that the network of exposures can be adequately modeled as a directed scale-free (weighted) graph with heavy-tailed degree and weight distributions. We also explore the relationship between connectivity of a financial institution and its capital buffer. Finally, we use the network structure to explore the extent of systemic risk generated in the system by the individual institutions.

Suggested Citation

  • Edson Bastos e Santos & Rama Cont, 2010. "The Brazilian Interbank Network Structure and Systemic Risk," Working Papers Series 219, Central Bank of Brazil, Research Department.
  • Handle: RePEc:bcb:wpaper:219
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    File URL: http://www.bcb.gov.br/pec/wps/ingl/wps219.pdf
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    Cited by:

    1. Krause, Andreas & Giansante, Simone, 2012. "Interbank lending and the spread of bank failures: A network model of systemic risk," Journal of Economic Behavior & Organization, Elsevier, vol. 83(3), pages 583-608.
    2. Carlos Castro & Juan S. Ordoñez & Sergio Preciado, 2016. "Network externalities across financial institutions," DOCUMENTOS DE TRABAJO 014287, UNIVERSIDAD DEL ROSARIO.
    3. repec:taf:quantf:v:17:y:2017:i:12:p:1923-1932 is not listed on IDEAS
    4. Carlos Castro & Juan Sebastian Ordoñez, 2012. "A Network model of systemic risk: identifying the sources of dependence across institutions," DOCUMENTOS DE TRABAJO 009651, UNIVERSIDAD DEL ROSARIO.
    5. Bussière, Matthieu & Hoerova, Marie & Klaus, Benjamin, 2015. "Commonality in hedge fund returns: Driving factors and implications," Journal of Banking & Finance, Elsevier, vol. 54(C), pages 266-280.
    6. He, Jianmin & Sui, Xin & Li, Shouwei, 2016. "An endogenous model of the credit network," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 441(C), pages 1-14.
    7. Glasserman, Paul & Young, H. Peyton, 2016. "Contagion in financial networks," LSE Research Online Documents on Economics 68681, London School of Economics and Political Science, LSE Library.
    8. Hossein Dastkhan & Naser Shams Gharneh, 2016. "Determination of Systemically Important Companies with Cross-Shareholding Network Analysis: A Case Study from an Emerging Market," International Journal of Financial Studies, MDPI, Open Access Journal, vol. 4(3), pages 1-17, June.
    9. Leonidov, A.V. & Rumyantsev, E.L., 2016. "Default contagion risks in Russian interbank market," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 451(C), pages 36-48.
    10. Caccioli, Fabio & Farmer, J. Doyne & Foti, Nick & Rockmore, Daniel, 2015. "Overlapping portfolios, contagion, and financial stability," Journal of Economic Dynamics and Control, Elsevier, vol. 51(C), pages 50-63.
    11. Stefano Battiston & Marco D'Errico & Stefano Gurciullo & Guido Caldarelli, 2015. "Leveraging the network: a stress-test framework based on DebtRank," Papers 1503.00621, arXiv.org, revised Feb 2016.
    12. Glasserman, Paul & Young, H. Peyton, 2015. "How likely is contagion in financial networks?," Journal of Banking & Finance, Elsevier, vol. 50(C), pages 383-399.
    13. International Monetary Fund, 2013. "France; Financial Sector Assessment Program—Technical Note on Stress Testing the Banking Sector," IMF Staff Country Reports 13/185, International Monetary Fund.
    14. Levy-Carciente, Sary & Kenett, Dror Y. & Avakian, Adam & Stanley, H. Eugene & Havlin, Shlomo, 2015. "Dynamical macroprudential stress testing using network theory," Journal of Banking & Finance, Elsevier, vol. 59(C), pages 164-181.
    15. 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.
    16. Bardoscia, Marco & Barucca, Paolo & Brinley Codd, Adam & Hill, John, 2017. "The decline of solvency contagion risk," Bank of England working papers 662, Bank of England.
    17. Kuzubaş, Tolga Umut & Saltoğlu, Burak & Sever, Can, 2016. "Systemic risk and heterogeneous leverage in banking networks," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 462(C), pages 358-375.
    18. Kk{e}stutis Baltakys & Juho Kanniainen & Frank Emmert-Streib, 2017. "Multilayer Aggregation with Statistical Validation: Application to Investor Networks," Papers 1708.09850, arXiv.org, revised Apr 2018.
    19. S. Gabrieli & D. Salakhova & G. Vuillemey, 2015. "Cross-border interbank contagion in the European banking sector," Working papers 545, Banque de France.
    20. Johannes Hain & Tom Fischer, 2015. "Valuation Algorithms for Structural Models of Financial Interconnectedness," Papers 1501.07402, arXiv.org.
    21. Leonidov, A. & Rumyantsev, E., 2013. "Russian Interbank Systemic Risks Assessment from the Network Topology Point of View," Journal of the New Economic Association, New Economic Association, vol. 19(3), pages 65-80.
    22. Fabio Caccioli & Thomas A. Catanach & J. Doyne Farmer, 2011. "Heterogeneity, correlations and financial contagion," Papers 1109.1213, arXiv.org.

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