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Stressing rating criteria allowing for default clustering: the CPDO case

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  • Torresetti, Roberto
  • Pallavicini, Andrea

Abstract

After a brief review of the literature on rating arbitrage for corporate and structured nance, we introduce the standard criteria adopted by rating agencies to assess riskiness of Constant Proportion Debt Obligations (CPDO). Then, we propose a new rating model in order to incorporate a more realistic loss distribution showing a multi-modal shape, which, in turn, is linked to default possibilities for clusters (possibly sectors) of names of the economy. In this framework, we show that the riskiness of CPDOs is substantially increased leading to a decrease of their rating, and in particular, we found that the expected payout of the gap-risk option, embedded in CPDOs, is greatly enhanced.

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File URL: http://mpra.ub.uni-muenchen.de/17104/
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Bibliographic Info

Paper provided by University Library of Munich, Germany in its series MPRA Paper with number 17104.

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Date of creation: 05 Oct 2007
Date of revision: 04 Sep 2009
Handle: RePEc:pra:mprapa:17104

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Related research

Keywords: CPDO Rating; Rating Arbitrage; Structured Finance; Loss Distribution; Loss Dynamics; Cluster Default Dynamics; Gap Risk;

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References

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  1. Anil Bangia & Francis X. Diebold & Til Schuermann, 2000. "Ratings Migration and the Business Cycle, With Application to Credit Portfolio Stress Testing," Center for Financial Institutions Working Papers 00-26, Wharton School Center for Financial Institutions, University of Pennsylvania.
  2. Damiano Brigo & Andrea Pallavicini & Roberto Torresetti, 2007. "Cluster-Based Extension Of The Generalized Poisson Loss Dynamics And Consistency With Single Names," International Journal of Theoretical and Applied Finance (IJTAF), World Scientific Publishing Co. Pte. Ltd., vol. 10(04), pages 607-631.
  3. Lando, David & Skodeberg, Torben M., 2002. "Analyzing rating transitions and rating drift with continuous observations," Journal of Banking & Finance, Elsevier, vol. 26(2-3), pages 423-444, March.
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Cited by:
  1. Damiano Brigo & Andrea Pallavicini & Roberto Torresetti, 2009. "Credit models and the crisis, or: how I learned to stop worrying and love the CDOs," Papers 0912.5427, arXiv.org, revised Feb 2010.

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