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Diversification and Endogenous Financial Networks

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  • Jean-Cyprien H'eam
  • Erwan Koch

Abstract

We test the hypothesis that interconnections across financial institutions can be explained by a diversification motive. This idea stems from the empirical evidence of the existence of long-term exposures that cannot be explained by a liquidity motive (maturity or currency mismatch). We model endogenous interconnections of heterogenous financial institutions facing regulatory constraints using a maximization of their expected utility. Both theoretical and simulation-based results are compared to a stylized genuine financial network. The diversification motive appears to plausibly explain interconnections among key players. Using our model, the impact of regulation on interconnections between banks -currently discussed at the Basel Committee on Banking Supervision- is analyzed.

Suggested Citation

  • Jean-Cyprien H'eam & Erwan Koch, 2014. "Diversification and Endogenous Financial Networks," Papers 1408.4618, arXiv.org, revised Feb 2015.
    • Handle: RePEc:arx:papers:1408.4618
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    References listed on IDEAS

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