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Risk-Sharing and the Creation of Systemic Risk

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  • Acharya, Viral
  • Iyer, Aaditya M.
  • Sundaram, Rangarajan K

Abstract

We address the paradox that financial innovations aimed at risk-sharing appear to have made the world riskier. Financial innovations facilitate hedging idiosyncratic risks among agents; however, aggregate risks can be hedged only with liquid assets. When risk-sharing is primitive, agents self-hedge and hold more liquid assets; this buffers aggregate risks, resulting in few correlated failures compared to when there is greater risk sharing. We apply this insight to build a model of a clearinghouse to show that as risk-sharing improves, aggregate liquidity falls but correlated failures rise. Public liquidity injections, for example, in the form of a lender-of-last-resort can reduce this systemic risk ex post, but induce lower ex-ante levels of private liquidity, which can in turn aggravate welfare costs from such injections.

Suggested Citation

  • Acharya, Viral & Iyer, Aaditya M. & Sundaram, Rangarajan K, 2020. "Risk-Sharing and the Creation of Systemic Risk," CEPR Discussion Papers 15269, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:15269
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    JEL classification:

    • G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
    • G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
    • G31 - Financial Economics - - Corporate Finance and Governance - - - Capital Budgeting; Fixed Investment and Inventory Studies

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