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Risk transfer with CDOs and systemic risk in bankingfam

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  • Krahnen, Jan Pieter
  • Wilde, Christian

Abstract

Large banks often sell part of their loan portfolio in the form of collateralized debt obligations (CDO) to investors. In this paper we raise the question whether credit asset securitization affects the cyclicality (or commonality) of bank equity values. The commonality of bank equity values reflects a major component of systemic risks in the banking market, caused by correlated defaults of loans in the banks’ loan books. Our simulations take into account the major stylized fact of CDO transactions, the nonproportional nature of risk sharing that goes along with tranching. We provide a theoretical framework for the risk transfer through securitization that builds on a macro risk factor and an idiosyncratic risk factor, allowing an identification of the types of risk that the individual tranche holders bear. This allows conclusions about the risk positions of issuing banks after risk transfer. Building on the strict subordination of tranches, we first evaluate the correlation properties both within and across risk classes. We then determine the effect of securitization on the systematic risk of all tranches, and derive its effect on the issuing bank’s equity beta. The simulation results show that under plausible assumptions concerning bank reinvestment behaviour and capital structure choice, the issuing intermediary’s systematic risk tends to rise. We discuss the implications of our findings for financial stability supervision. --

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Bibliographic Info

Paper provided by Center for Financial Studies (CFS) in its series CFS Working Paper Series with number 2006/04.

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Date of creation: 2006
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Handle: RePEc:zbw:cfswop:200604

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Related research

Keywords: Risk Transfer; Systematic Risk; Systemic Risk;

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References

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  1. Guenter Franke & Jan Pieter Krahnen, 2005. "Default Risk Sharing Between Banks and Markets: The Contribution of Collateralized Debt Obligations," NBER Working Papers 11741, National Bureau of Economic Research, Inc.
  2. G.G. Kaufman, 2000. "Banking and Currency Crises and Systemic Risk: A Taxonomy and Review," DNB Staff Reports (discontinued) 48, Netherlands Central Bank.
  3. Peter M. DeMarzo, 2005. "The Pooling and Tranching of Securities: A Model of Informed Intermediation," Review of Financial Studies, Society for Financial Studies, vol. 18(1), pages 1-35.
  4. Greenbaum, Stuart I. & Thakor, Anjan V., 1987. "Bank funding modes : Securitization versus deposits," Journal of Banking & Finance, Elsevier, vol. 11(3), pages 379-401, September.
  5. Lehar, Alfred, 2005. "Measuring systemic risk: A risk management approach," Journal of Banking & Finance, Elsevier, vol. 29(10), pages 2577-2603, October.
  6. Instefjord, Norvald, 2005. "Risk and hedging: Do credit derivatives increase bank risk?," Journal of Banking & Finance, Elsevier, vol. 29(2), pages 333-345, February.
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Cited by:
  1. Fender, Ingo & Mitchell, Janet, 2009. "Incentives and Tranche Retention in Securitisation: A Screening Model," CEPR Discussion Papers 7483, C.E.P.R. Discussion Papers.
  2. Carbó-Valverde, Santiago & Marques-Ibanez, David & Rodríguez-Fernández, Francisco, 2012. "Securitization, risk-transferring and financial instability: The case of Spain," Journal of International Money and Finance, Elsevier, vol. 31(1), pages 80-101.

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