Mitigating the Pro-Cyclicality of Basel II

44 Pages Posted: 12 Oct 2010

See all articles by Rafael Repullo

Rafael Repullo

Centre for Monetary and Financial Studies (CEMFI); Centre for Economic Policy Research (CEPR); European Corporate Governance Institute (ECGI)

Jesús Saurina

Bank of Spain

Carlos Trucharte

Banco de España

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Abstract

Policy discussions on the recent financial crisis feature widespread calls to address the pro-cyclical effects of regulation. The main concern is that the new risk-sensitive bank capital regulation (Basel II) may amplify business cycle fluctuations. This paper compares the leading alternative procedures that have been proposed to mitigate this problem. We estimate a model of the probabilities of default (PDs) of Spanish firms during the period 1987–2008, and use the estimated PDs to compute the corresponding series of Basel II capital requirements per unit of loans. These requirements move significantly along the business cycle, ranging from 7.6% (in 2006) to 11.9% (in 1993). The comparison of the different procedures is based on the criterion of minimizing the root mean square deviations of each adjusted series with respect to the Hodrick–Prescott trend of the original series. The results show that the best procedures are either to smooth the input of the Basel II formula by using through-the-cycle PDs or to smooth the output with a multiplier based on GDP growth. Our discussion concludes that the latter is better in terms of simplicity, transparency, and consistency with banks’ risk pricing and risk management systems. For the portfolio of Spanish commercial and industrial loans and a 45% loss given default (LGD), the multiplier would amount to a 6.5% surcharge for each standard deviation in GDP growth. The surcharge would be significantly higher with cyclically varying LGDs.

Suggested Citation

Repullo, Rafael and Saurina, Jesús and Trucharte, Carlos, Mitigating the Pro-Cyclicality of Basel II. Economic Policy, Vol. 25, No. 64, pp. 659-702, October 2010. Available at SSRN: https://ssrn.com/abstract=1688634 or http://dx.doi.org/10.1111/j.1468-0327.2010.00252.x

Rafael Repullo (Contact Author)

Centre for Monetary and Financial Studies (CEMFI) ( email )

Casado del Alisal 5
28014 Madrid
Spain
+34 91429 0551 (Phone)
+34 91429 1056 (Fax)

HOME PAGE: http://www.cemfi.es/~repullo/

Centre for Economic Policy Research (CEPR)

London
United Kingdom

European Corporate Governance Institute (ECGI)

c/o ECARES ULB CP 114
B-1050 Brussels
Belgium

HOME PAGE: http://www.ecgi.org

Jesús Saurina

Bank of Spain

Carlos Trucharte

Banco de España ( email )

Alcala 50
Madrid 28014
Spain

HOME PAGE: http://www.bde.es

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