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Ratings Shopping and Asset Complexity: A Theory of Ratings Inflation

  • Vasiliki Skreta
  • Laura Veldkamp

Many identify inflated credit ratings as one contributor to the recent financial market turmoil. We develop an equilibrium model of the market for ratings and use it to examine possible origins of and cures for ratings inflation. In the model, asset issuers can shop for ratings -- observe multiple ratings and disclose only the most favorable -- before auctioning their assets. When assets are simple, agencies' ratings are similar and the incentive to ratings shop is low. When assets are sufficiently complex, ratings differ enough that an incentive to shop emerges. Thus, an increase in the complexity of recently-issued securities could create a systematic bias in disclosed ratings, despite the fact that each ratings agency produces an unbiased estimate of the asset's true quality. Increasing competition among agencies would only worsen this problem. Switching to an investor-initiated ratings system alleviates the bias, but could collapse the market for information.

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Paper provided by National Bureau of Economic Research, Inc in its series NBER Working Papers with number 14761.

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Date of creation: Feb 2009
Date of revision:
Publication status: published as Skreta, Vasiliki & Veldkamp, Laura, 2009. "Ratings shopping and asset complexity: A theory of ratings inflation," Journal of Monetary Economics, Elsevier, vol. 56(5), pages 678-695, July.
Handle: RePEc:nbr:nberwo:14761
Note: AP CF ME
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  1. Philip J Reny & Motty Perry, 2006. "Toward a Strategic Foundation for Rational Expectations Equilibrium," Econometrica, Econometric Society, vol. 74(5), pages 1231-1269, 09.
  2. Erik Eyster & Matthew Rabin, 2005. "Cursed Equilibrium," Econometrica, Econometric Society, vol. 73(5), pages 1623-1672, 09.
  3. Benabou, R. & Laroque, G., 1988. "Using Privileged Information To Manipulate Markets: Insiders, Gurus And Credibility," Papers 19, Princeton, Woodrow Wilson School - Discussion Paper.
  4. Paul Wachtel & Rainer Haselmann, 2007. "Risk Taking by Banks in the Transition Countries," Working Papers 07-18, New York University, Leonard N. Stern School of Business, Department of Economics.
  5. Faure-Grimaud, Antoine & Peyrache, Eloïc & Quesada, Lucía, 2005. "The Ownership of Ratings," CEPR Discussion Papers 5432, C.E.P.R. Discussion Papers.
  6. Boyan Jovanovic, 1982. "Truthful Disclosure of Information," Bell Journal of Economics, The RAND Corporation, vol. 13(1), pages 36-44, Spring.
  7. Patrick Bolton & Xavier Freixas & Joel Shapiro, 2009. "The Credit Ratings Game," NBER Working Papers 14712, National Bureau of Economic Research, Inc.
  8. Bullard, J. & Evans, G.W. & Honkapohja ,S., 2005. "Near-Rational Exuberance," Cambridge Working Papers in Economics 0546, Faculty of Economics, University of Cambridge.
  9. Damiano, Ettore & Li, Hao & Suen, Wing, 2008. "Credible ratings," Theoretical Economics, Econometric Society, vol. 3(3), September.
  10. Emmanuel Farhi & Josh Lerner & Jean Tirole, . "Fear of Rejection? Tiered Certification and Transparency," Working Paper 78856, Harvard University OpenScholar.
  11. Laura Veldkamp, 2003. "Media Frenzies in Markets for Financial Information," Working Papers 03-20, New York University, Leonard N. Stern School of Business, Department of Economics.
  12. Peter M. DeMarzo & Dimitri Vayanos & Jeffrey Zwiebel, 2003. "Persuasion bias, social influence, and uni-dimensional opinions," LSE Research Online Documents on Economics 454, London School of Economics and Political Science, LSE Library.
  13. Joël Peress, 2004. "Wealth, Information Acquisition, and Portfolio Choice," Review of Financial Studies, Society for Financial Studies, vol. 17(3), pages 879-914.
  14. Barlevy, Gadi & Veronesi, Pietro, 2000. "Information Acquisition in Financial Markets," Review of Economic Studies, Wiley Blackwell, vol. 67(1), pages 79-90, January.
  15. Hellwig, Martin F., 1980. "On the aggregation of information in competitive markets," Journal of Economic Theory, Elsevier, vol. 22(3), pages 477-498, June.
  16. Grossman, Sanford J, 1981. "The Informational Role of Warranties and Private Disclosure about Product Quality," Journal of Law and Economics, University of Chicago Press, vol. 24(3), pages 461-83, December.
  17. Morgan, J. & Stocken, P., 1998. "An Analysis of Stock Recommendations," Papers 204, Princeton, Woodrow Wilson School - Public and International Affairs.
  18. Sanford J Grossman & Joseph E Stiglitz, 1997. "On the Impossibility of Informationally Efficient Markets," Levine's Working Paper Archive 1908, David K. Levine.
  19. Steven Shavell, 1994. "Acquisition and Disclosure of Information Prior to Sale," RAND Journal of Economics, The RAND Corporation, vol. 25(1), pages 20-36, Spring.
  20. Bolton, Patrick & Freixas, Xavier & Shapiro, Joel, 2007. "Conflicts of interest, information provision, and competition in the financial services industry," Journal of Financial Economics, Elsevier, vol. 85(2), pages 297-330, August.
  21. Paul R. Milgrom, 1979. "Good Nevs and Bad News: Representation Theorems and Applications," Discussion Papers 407R, Northwestern University, Center for Mathematical Studies in Economics and Management Science.
  22. Ignacio Esponda, 2008. "Behavioral Equilibrium in Economies with Adverse Selection," American Economic Review, American Economic Association, vol. 98(4), pages 1269-91, September.
  23. Bo Becker & Todd Milbourn, 2008. "Reputation and competition: evidence from the credit rating industry," Harvard Business School Working Papers 09-051, Harvard Business School, revised Sep 2010.
  24. Brunnermeier, Markus K., 2001. "Asset Pricing under Asymmetric Information: Bubbles, Crashes, Technical Analysis, and Herding," OUP Catalogue, Oxford University Press, number 9780198296980.
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