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Contagious herding and endogenous network formation in financial networks

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  • Georg, Co-Pierre

Abstract

When banks choose similar investment strategies, the financial system becomes vulnerable to common shocks. Banks decide about their investment strategy ex-ante based on a private belief about the state of the world and a social belief formed from observing the actions of peers. When the social belief is strong and the financial network is fragmented, banks follow their peers and their investment strategies synchronize. This effect is stronger for less informative private signals. For endogenously formed interbank networks, however, less informative signals lead to higher network density and less synchronization. It is shown that the former effect dominates the latter.

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  • Georg, Co-Pierre, 2014. "Contagious herding and endogenous network formation in financial networks," Discussion Papers 23/2014, Deutsche Bundesbank.
  • Handle: RePEc:zbw:bubdps:232014
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    Cited by:

    1. Jean-Cyprien H'eam & Erwan Koch, 2014. "Diversification and Endogenous Financial Networks," Papers 1408.4618, arXiv.org, revised Feb 2015.
    2. Marcin Borsuk & Konrad Kostrzewa, 2020. "Miary ryzyka systemowego dla Polski. Jak ryzyko systemowe wpływa na akcję kredytową banków?," Bank i Kredyt, Narodowy Bank Polski, vol. 51(3), pages 211-238.

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    More about this item

    Keywords

    social learning; endogenous financial networks; multi-agent simulations; systemic risk;
    All these keywords.

    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • C73 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Stochastic and Dynamic Games; Evolutionary Games
    • D53 - Microeconomics - - General Equilibrium and Disequilibrium - - - Financial Markets
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation

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