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Interconnected Banks and Systemically Important Exposures

Author

Listed:
  • Alan Roncoroni
  • Stefano Battiston
  • Marco D’Errico
  • Grzegorz Halaj
  • Christoffer Kok
Abstract
How do banks' interconnections in the euro area contribute to the vulnerability of the banking system? We study both the direct interconnections (banks lend to each other) and the indirect interconnections (banks are exposed to similar sectors of the economy). These complex linkages make the banking system more vulnerable to contagion risks. We use a unique supervisory dataset of the European Central Bank with the 26 largest banks in the euro area. Introducing a new measure of indirect interconnections, we assess to what extent banks are significantly exposed to devaluation risk of commonly held assets. We find that for small shocks, banks that operate in multiple countries make the banking system more resilient. But for large shocks, international diversification makes the banking system less resilient. While contagion risk is usually ignored in supervisory stress tests, it can have significant impacts on banks' solvency and should influence how supervisors design regulations. However, we find there is no one-size-fits-all solution: the optimal financial architecture depends on the shocks considered and the international diversification.

Suggested Citation

  • Alan Roncoroni & Stefano Battiston & Marco D’Errico & Grzegorz Halaj & Christoffer Kok, 2019. "Interconnected Banks and Systemically Important Exposures," Staff Working Papers 19-44, Bank of Canada.
    • Handle: RePEc:bca:bocawp:19-44
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    References listed on IDEAS

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    5. Carro, Adrian & Stupariu, Patricia, 2024. "Uncertainty, non-linear contagion and the credit quality channel: An application to the Spanish interbank market," Journal of Financial Stability, Elsevier, vol. 71(C).
    6. Gourdel, Régis & Sydow, Matthias, 2022. "Non-banks contagion and the uneven mitigation of climate risk," Working Paper Series 2757, European Central Bank.
    7. C'elestin Coquid'e & Jos'e Lages & Dima L. Shepelyansky, 2020. "Crisis contagion in the world trade network," Papers 2002.07100, arXiv.org.
    8. Fukker, Gábor & Kok, Christoffer, 2024. "On the optimal control of interbank contagion in the euro area banking system," Journal of Financial Stability, Elsevier, vol. 71(C).
    9. J. Rickman & M. Falkenberg & S. Kothari & F. Larosa & M. Grubb & N. Ameli, 2024. "The challenge of phasing-out fossil fuel finance in the banking sector," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    10. Mikhail Stolbov & Daniil Parfenov, 2023. "Credit risk linkages in the international banking network, 2000–2019," Risk Management, Palgrave Macmillan, vol. 25(3), pages 1-38, September.
    11. Chen, Jianyu & Zhang, Jianshun, 2023. "Crude oil price shocks, volatility spillovers, and global systemic financial risk transmission mechanisms: Evidence from the stock and foreign exchange markets," Resources Policy, Elsevier, vol. 85(PB).
    12. Carlos León & Javier Miguélez, 2021. "Securities cross-holding in the Colombian financial system: a topological approach," Studies in Economics and Finance, Emerald Group Publishing Limited, vol. 38(4), pages 786-806, February.
    13. Foglia, Matteo & Di Tommaso, Caterina & Wang, Gang-Jin & Pacelli, Vincenzo, 2024. "Interconnectedness between stock and credit markets: The role of European G-SIBs in a multilayer perspective," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 91(C).
    14. Aldasoro, Iñaki & Hüser, Anne-Caroline & Kok, Christoffer, 2022. "Contagion accounting in stress-testing," Journal of Economic Dynamics and Control, Elsevier, vol. 137(C).
    15. Shuyue Jin & Lei Song & Lei Shu & Qifeng Gao & Yu Chen, 2024. "Systemic risk in Chinese interbank lending networks: insights from short-term and long-term lending data," Empirical Economics, Springer, vol. 67(6), pages 2539-2564, December.
    16. Feinstein, Zachary & Hałaj, Grzegorz, 2023. "Interbank asset-liability networks with fire sale management," Journal of Economic Dynamics and Control, Elsevier, vol. 155(C).
    17. Abad, Jorge & D’Errico, Marco & Killeen, Neill & Luz, Vera & Peltonen, Tuomas & Portes, Richard & Urbano, Teresa, 2022. "Mapping exposures of EU banks to the global shadow banking system," Journal of Banking & Finance, Elsevier, vol. 134(C).
    18. Lebastard, Laura, 2022. "Financial exposure and bank mergers: micro and macro evidence from the EU," Working Paper Series 2724, European Central Bank.
    19. Durrani, Agha & Metzler, Julian & Michail, Nektarios & Werner, Johannes Gabriel, 2022. "Bank lending rates and the remuneration for risk: evidence from portfolio and loan level data," Working Paper Series 2753, European Central Bank.
    20. Curcio, Domenico & Gianfrancesco, Igor & Vioto, Davide, 2023. "Climate change and financial systemic risk: Evidence from US banks and insurers," Journal of Financial Stability, Elsevier, vol. 66(C).
    21. Caccioli, Fabio & Ferrara, Gerardo & Ramadiah, Amanah, 2024. "Modelling fire sale contagion across banks and non-banks," Journal of Financial Stability, Elsevier, vol. 71(C).
    22. Financial Stability Committee, Task Force on cross-border Spillover Effects of macroprudential measures & Kok, Christoffer & Reinhardt, Dennis, 2020. "Cross-border spillover effects of macroprudential policies: a conceptual framework," Occasional Paper Series 242, European Central Bank.
    23. Feinstein, Zachary & Hałaj, Grzegorz, 2023. "Interbank asset-liability networks with fire sale management," Working Paper Series 2806, European Central Bank.

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    More about this item

    Keywords

    Financial stability;

    JEL classification:

    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • G - Financial Economics
    • G1 - Financial Economics - - General Financial Markets
    • G15 - Financial Economics - - General Financial Markets - - - International Financial Markets
    • G2 - Financial Economics - - Financial Institutions and Services
    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages

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