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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
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    Cited by:

    1. Bluhm, Marcel, 2015. "Interbank funding as insurance mechanism for (persistent) liquidity shocks," SAFE Working Paper Series 117, Leibniz Institute for Financial Research SAFE.
    2. Bluhm, Marcel, 2018. "Persistent liquidity shocks and interbank funding," Journal of Financial Stability, Elsevier, vol. 36(C), pages 246-262.
    3. 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.
    4. 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.
    5. 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.
    6. 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.
    7. Calimani, Susanna & Hałaj, Grzegorz & Żochowski, Dawid, 2020. "Simulating fire sales in a system of banks and asset managers," Working Paper Series 2373, European Central Bank.
    8. 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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