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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.

Suggested Citation

  • Bluhm, Marcel & Faia, Ester & Krahnen, Jan Pieter, 2014. "Monetary policy implementation in an interbank network: Effects on systemic risk," SAFE Working Paper Series 46, Leibniz Institute for Financial Research SAFE.
    • Handle: RePEc:zbw:safewp:46
    DOI: 10.2139/ssrn.2417219
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    References listed on IDEAS

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    Cited by:

    1. Holton, Sarah & Rodriguez d’Acri, Costanza, 2015. "Jagged Cliffs and Stumbling Blocks: Interest Rate Pass-through Fragmentation during the Euro Area Crisis," Research Technical Papers 01/RT/15, Central Bank of Ireland.
    2. Sadhan Kumar Chattopadhyay & Arghya Kusum Mitra, 2023. "Monetary policy transmission in India under the base rate and MCLR regimes: a comparative study," Palgrave Communications, Palgrave Macmillan, vol. 10(1), pages 1-14, December.
    3. Nevermann, Daniel & Heckmann, Lotta, 2023. "Effects of mergers on network models of the financial system," Discussion Papers 29/2023, Deutsche Bundesbank.
    4. Bluhm, Marcel, 2015. "Interbank funding as insurance mechanism for (persistent) liquidity shocks," SAFE Working Paper Series 117, Leibniz Institute for Financial Research SAFE.
    5. Bluhm, Marcel, 2018. "Persistent liquidity shocks and interbank funding," Journal of Financial Stability, Elsevier, vol. 36(C), pages 246-262.
    6. Brancaccio, Emiliano & Giammetti, Raffaele & Lopreite, Milena & Puliga, Michelangelo, 2019. "Monetary policy, crisis and capital centralization in corporate ownership and control networks: A B-Var analysis," Structural Change and Economic Dynamics, Elsevier, vol. 51(C), pages 55-66.
    7. Michel Alexandre & Gilberto Tadeu Lima & Luca Riccetti & Alberto Russo, 2023. "The financial network channel of monetary policy transmission: an agent-based model," Journal of Economic Interaction and Coordination, Springer;Society for Economic Science with Heterogeneous Interacting Agents, vol. 18(3), pages 533-571, July.
    8. Souza, Sergio Rubens Stancato de, 2016. "Capital requirements, liquidity and financial stability: The case of Brazil," Journal of Financial Stability, Elsevier, vol. 25(C), pages 179-192.
    9. Holton, Sarah & Rodriguez d’Acri, Costanza, 2018. "Interest rate pass-through since the euro area crisis," Journal of Banking & Finance, Elsevier, vol. 96(C), pages 277-291.
    10. Thiago Christiano Silva & Solange Maria Guerra & Michel Alexandre da Silva & Benjamin Miranda Tabak, 2018. "Interconnectedness, Firm Resilience and Monetary Policy," Working Papers Series 478, Central Bank of Brazil, Research Department.
    11. Calimani, Susanna & Hałaj, Grzegorz & Żochowski, Dawid, 2017. "Simulating fire-sales in a banking and shadow banking system," ESRB Working Paper Series 46, European Systemic Risk Board.
    12. Hüser, Anne-Caroline, 2016. "Too interconnected to fail: A survey of the Interbank Networks literature," SAFE Working Paper Series 91, Leibniz Institute for Financial Research SAFE, revised 2016.
    13. Calimani, Susanna & Hałaj, Grzegorz & Żochowski, Dawid, 2022. "Simulating fire sales in a system of banks and asset managers," Journal of Banking & Finance, Elsevier, vol. 138(C).
    14. Nevermann, Daniel & Heckmann-Draisbach, Lotta, 2023. "Effects of mergers on network models of the financial system," International Review of Financial Analysis, Elsevier, vol. 90(C).
    15. Silva, Thiago Christiano & Guerra, Solange Maria & da Silva, Michel Alexandre & Tabak, Benjamin Miranda, 2020. "Micro-level transmission of monetary policy shocks: The trading book channel," Journal of Economic Behavior & Organization, Elsevier, vol. 179(C), pages 279-298.

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    More about this item

    Keywords

    network formation; contagion; central banks' interventions;
    All these keywords.

    JEL classification:

    • C63 - Mathematical and Quantitative Methods - - Mathematical Methods; Programming Models; Mathematical and Simulation Modeling - - - Computational Techniques
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
    • G01 - Financial Economics - - General - - - Financial Crises
    • G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation

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