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Credit Risk, Systemic Uncertainties and Economic Capital Requirements for an Artificial Bank Loan Portfolio

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  • Alexis Derviz
  • Narcisa Kadlcakova
  • Lucie Kobzova

Abstract

This paper analyses the impact of different credit risk-based capital requirement implementations on banks' need for capital. The capital requirements for an artificially constructed risky loan portfolio are calculated by applying the BIS approach, the two widespread commercial risk-measurement models, CreditMetrics and CreditRisk+, and, finally, an original synthetic model similar to KMV. In the first three cases we closely follow the methodologies proposed by the regulatory or credit risk models. Economic capital requirements for the latter are obtained by means of Monte Carlo simulations. In the context of CreditMetrics, we additionally perform a Monte Carlo-based stress testing of the monetary policy changes reflected in the term structure of interest rates. Our model of KMV type combines the elements of the structural and the reduced-form methods of risky debt pricing, and the possibilities of its numerical solution are outlined.

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Bibliographic Info

Paper provided by Czech National Bank, Research Department in its series Working Papers with number 2003/09.

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Date of creation: Dec 2003
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Handle: RePEc:cnb:wpaper:2003/09

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Keywords: credit risk; economic capital; market risk; New Basel Capital Accord; systemic uncertainty.;

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References

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  1. Joshua Rosenberg & Robert F. Engle, 2000. "Empirical Pricing Kernels," New York University, Leonard N. Stern School Finance Department Working Paper Seires 99-014, New York University, Leonard N. Stern School of Business-.
  2. Ait-Sahalia, Yacine & Lo, Andrew W., 2000. "Nonparametric risk management and implied risk aversion," Journal of Econometrics, Elsevier, vol. 94(1-2), pages 9-51.
  3. Dilip Madan & Haluk Unal, 1999. "A Two-Factor Hazard-Rate Model for Pricing Risky Debt and the Term Structure of Credit Spreads," Center for Financial Institutions Working Papers 99-32, Wharton School Center for Financial Institutions, University of Pennsylvania.
  4. Jarrow, Robert A & Turnbull, Stuart M, 1995. " Pricing Derivatives on Financial Securities Subject to Credit Risk," Journal of Finance, American Finance Association, vol. 50(1), pages 53-85, March.
  5. Barnhill Jr., Theodore M. & Maxwell, William F., 2002. "Modeling correlated market and credit risk in fixed income portfolios," Journal of Banking & Finance, Elsevier, vol. 26(2-3), pages 347-374, March.
  6. Jarrow, Robert A & Lando, David & Turnbull, Stuart M, 1997. "A Markov Model for the Term Structure of Credit Risk Spreads," Review of Financial Studies, Society for Financial Studies, vol. 10(2), pages 481-523.
  7. Jackwerth, Jens Carsten, 2000. "Recovering Risk Aversion from Option Prices and Realized Returns," Review of Financial Studies, Society for Financial Studies, vol. 13(2), pages 433-51.
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Cited by:
  1. Alexis Derviz & Narcisa Kadlcáková, 2005. "Business cycle, credit risk and economic capital determination by commercial banks," BIS Papers chapters, in: Bank for International Settlements (ed.), Investigating the relationship between the financial and real economy, volume 22, pages 299-327 Bank for International Settlements.
  2. Van Roy, Patrick, 2005. "Credit ratings and the standardised approach to credit risk in Basel II," Working Paper Series 0517, European Central Bank.

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