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Credit ratings and the standardised approach to credit risk in Basel II

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Author Info

  • Patrick Van Roy

    (National Bank of Belgium, Brussels)

Abstract

This paper focuses on the standardised approach to credit risk in Basel II. The minimum capital requirements for the corporate, interbank and sovereign loan portfolios of a representative bank in each EMU country are evaluated by means of Monte-Carlo simulations depending on the credit rating agencies chosen by the bank to risk-weight its exposures. Three main results emerge from the analysis. First, although the use of different combinations of credit rating agencies leads to significant differences in minimum capital requirements, these differences never exceed 10% of banks’ regulatory capital for loans to corporates, banks and sovereigns on average in the EMU. Second, the standardised approach provides a small regulatory capital incentive for banks to use several credit rating agencies to risk-weight their exposures. Third, the minimum capital requirements for the corporate, interbank and sovereign loan portfolios of EMU banks will be higher in Basel II than in Basel I. I also show that the incentive for banks to engage in regulatory arbitrage in the standardised approach to credit risk is limited.

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File URL: http://128.118.178.162/eps/fin/papers/0509/0509014.pdf
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Bibliographic Info

Paper provided by EconWPA in its series Finance with number 0509014.

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Length: 45 pages
Date of creation: 11 Sep 2005
Date of revision:
Handle: RePEc:wpa:wuwpfi:0509014

Note: Type of Document - pdf; pages: 45
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Web page: http://128.118.178.162

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Keywords: New Basel Accord; capital requirements; credit rating agencies;

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References

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  1. C. H. Furfine & Jeffery D. Amato, 2003. "Are credit ratings procyclical?," BIS Working Papers 129, Bank for International Settlements.
  2. Upper, Christian & Worms, Andreas, 2002. "Estimating Bilateral Exposures in the German Interbank Market: Is there a Danger of Contagion?," Discussion Paper Series 1: Economic Studies 2002,09, Deutsche Bundesbank, Research Centre.
  3. Degryse, H.A. & Nguyen, G., 2004. "Interbank Exposures: An Empirical Examination of Systemic Risk in the Belgian Banking System," Discussion Paper 2004-4, Tilburg University, Center for Economic Research.
  4. Altman, Edward I. & Saunders, Anthony, 2001. "An analysis and critique of the BIS proposal on capital adequacy and ratings," Journal of Banking & Finance, Elsevier, vol. 25(1), pages 25-46, January.
  5. Richard Cantor & Frank Packer, 1995. "Sovereign credit ratings," Current Issues in Economics and Finance, Federal Reserve Bank of New York, vol. 1(Jun).
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  8. Jacobson, Tor & Lindé, Jesper & Roszbach, Kasper, 2003. "Internal Ratings Systems, Implied Credit Risk and the Consistency of Banks’ Risk Classification Policies," Working Paper Series 155, Sveriges Riksbank (Central Bank of Sweden).
  9. Sironi, Andrea, 2003. " Testing for Market Discipline in the European Banking Industry: Evidence from Subordinated Debt Issues," Journal of Money, Credit and Banking, Blackwell Publishing, vol. 35(3), pages 443-72, June.
  10. Ongena, Steven & Smith, David C., 2000. "What Determines the Number of Bank Relationships? Cross-Country Evidence," Journal of Financial Intermediation, Elsevier, vol. 9(1), pages 26-56, January.
  11. Mark Carey, 1998. "Credit Risk in Private Debt Portfolios," Journal of Finance, American Finance Association, vol. 53(4), pages 1363-1387, 08.
  12. Alexis Derviz & Narcisa Kadlcakova & Lucie Kobzova, 2003. "Credit Risk, Systemic Uncertainties and Economic Capital Requirements for an Artificial Bank Loan Portfolio," Working Papers 2003/09, Czech National Bank, Research Department.
  13. Ferri, Giovanni & Liu, Li-Gang & Majnoni, Giovanni, 2001. "The role of rating agency assessments in less developed countries: Impact of the proposed Basel guidelines," Journal of Banking & Finance, Elsevier, vol. 25(1), pages 115-148, January.
  14. Altman, Edward I. & Bharath, Sreedhar T. & Saunders, Anthony, 2002. "Credit ratings and the BIS capital adequacy reform agenda," Journal of Banking & Finance, Elsevier, vol. 26(5), pages 909-921, May.
  15. Donald P. Morgan, 2002. "Rating Banks: Risk and Uncertainty in an Opaque Industry," American Economic Review, American Economic Association, vol. 92(4), pages 874-888, September.
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Cited by:
  1. Hauck, Achim & Neyer, Ulrike, 2014. "Disagreement between rating agencies and bond opacity: A theoretical perspective," Economics Letters, Elsevier, vol. 123(1), pages 82-85.

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