Macroprudential stress testing of credit risk: A practical approach for policy makers

Buncic, Daniel and Martin, Melecky (2011): Macroprudential stress testing of credit risk: A practical approach for policy makers.

Abstract

Drawing on the lessons from the global financial crisis and especially from its impact on the banking systems of Eastern Europe, the paper proposes a new practical approach to macroprudential stress testing. The proposed approach incorporates: (i) macroeconomic stress scenarios generated from both a country specific statistical model and historical cross-country crises experience; (ii) indirect credit risk due to foreign currency exposures of unhedged borrowers; (iii) varying underwriting practices across banks and their asset classes based on their relative aggressiveness of lending; (iv) higher correlations between the probability of default and the loss given default during stress periods; (v) a negative effect of lending concentration and residual loan maturity on unexpected losses; and (vi) the use of an economic risk weighted capital adequacy ratio as the relevant outcome indicator to measure the resilience of banks to materialising credit risk. We apply the proposed approach to a set of Eastern European banks and discuss the results.

• Item Type: MPRA Paper
• Language: English
• Keywords: Macroprudential Supervision, Stress Test, Individual Bank Data, Eastern Europe
• Subjects: E - Macroeconomics and Monetary Economics > E5 - Monetary Policy, Central Banking, and the Supply of Money and Credit > E58 - Central Banks and Their Policies; G - Financial Economics > G2 - Financial Institutions and Services > G28 - Government Policy and Regulation; G - Financial Economics > G2 - Financial Institutions and Services > G21 - Banks ; Depository Institutions ; Micro Finance Institutions ; Mortgages

References

Altman, Edward I., Andrea Resti and Andrea Sironi (2002): “The link between default and recovery rates: effects on the procyclicality of regulatory capital ratios,” BIS Working Paper No. 113, Bank for International Settlements.

Alves, I. (2004): “Corporate fragilitys sectoral dynamics and determinants: evidence from expected default measures,” mimeo, European Central Bank.

Arellano, Manuel and Stephen Bond (1991): “Some Tests of Specification for Panel Data: Monte Carlo Evidence and an Application to Employment Equations,” Review of Economic Studies, 58(2), 277–297.

Bangia, Anil, Francis X. Diebold, Andre Kronimus, Christian Schagen and Til Schuermann (2002): “Ratings migration and the business cycle, with application to credit portfolio stress testing,” Journal of Banking and Finance, 26(2-3), 445–474.

Basel II (2006): “International Convergence of Capital Measurement and Capital Standards: A Revised Framework - Comprehensive Version,” Bank for International Settlements. Available from: http: //www.bis.org/publ/bcbs128.pdf.

Basurto, Miguel A. Segoviano and Charles A. E. Goodhart (2009): “Banking Stability Measures,” IMF Working Paper No. 09/4, International Monetary Fund.

BIS (2006): “Results of the fifth quantitative impact study (QIS 5),” Bank for International Settlements. Available from: http://www.bis.org/bcbs/qis/qis5results.pdf.

–————(2010): “Basel III: A global regulatory framework for more resilient banks and banking systems,” Bank for International Settlements. Available from: http://www.bis.org/publ/bcbs189.pdf.

Bluhm, Christian, Ludger Overbeck and ChristophWagner (2003): An Introduction to Credit Risk Modeling, Chapman and Hall.

Brand, Claus, Daniel Buncic and Jarkko Turunen (2010): “The Impact of ECB Monetary Policy Decisions and Communication on the Yield Curve,” Journal of the European Economic Association, 8(6), 1266–1298.

Breuer, Thomas, Martin Jandacka, Klaus Rheinberger and Martin Summer (2009): “How to find plausible, severe, and useful stress scenarios,” International Journal of Central Banking, 5(3), 205– 224.

Buncic, Daniel (2011): “Understanding forecast failure of ESTAR models of real exchange rates,” Empirical Economics, in Press. Available from: http://www.springerlink.com/content/ 5k42q75364q86561/fulltext.pdf.

Buncic, Daniel and Martin Melecky (2008): “An Estimated New Keynesian Policy Model for Australia,” The Economic Record, 84(264), 1–16.

Christiano, Lawrence, Roberto Motto and Massimo Rostagno (2010): “Financial factors in economic fluctuations,” ECB Working Paper No. 1192, European Central Bank.

Cihak, Martin (2007): “Introduction to Applied Stress Testing,” IMFWorking Paper No. 07/59, International Monetary Fund.

Cihak, Martin and Klaus Schaeck (2010): “How well do aggregate prudential ratios identify banking system problems?” Journal of Financial Stability, 6(3), 130–144.

de Larosiere, Jacques (2009): “The high-level group on financial supervision in the EU,” EU Report on Supervision. Available from: http://ec.europa.eu/internal market/finances/docs/ de larosiere report en.pdf.

De Nicolo, Gianni and Marcella Lucchetta (2010): “Systemic Real and Financial Risks: Measurement, Forecasting and Stress Testing,” IMF Jacques Polak Research Conference. Washington, D.C., International Monetary Fund.

Drehmann, Mathias and Mark Manning (2004): “Systemic factors influencing UK equity returns,” mimeo, Bank of England.

Foglia, Antonella (2009): “Stress Testing Credit Risk: A Survey of Authorities’ Aproaches,” International Journal of Central Banking, 5(3), 9–45.

Galati, Gabriele and Richhild Moessner (2011): “Macroprudential policy - A literature review,” BIS Working Papers No. 337, Bank for International Settlements.

Glick, Reuven and Michael M. Hutchison (1999): “Banking and Currency Crises: How Common Are Twins?” Working Paper No. PB99-07, Federal Reserve Bank of San Francisco. Available from: http://ideas.repec.org/p/kud/epruwp/99-20.html.

Haldane, Andrew G. (2009): “Why banks failed the stress test,” Speech given at the Marcus-Evans Conference on Stress-Testing. Available from: http://www.bankofengland.co.uk/publications/ speeches/2009/speech374.pdf.

Ivanov, Ventzislav and Lutz Kilian (2005): “A Practitioner’s Guide to Lag Order Selection For VAR Impulse Response Analysis,” Studies in Nonlinear Dynamics & Econometrics, 9(1), Article 2.

Kaminsky, Graciela L. and Carmen M. Reinhart (1999): “The Twin Crises: The Causes of Banking and Balance-of-Payments Problems,” American Economic Review, 89(3), 473–500.

Kumhof, Michael, Dirk Muir, Susanna Mursula and Douglas Laxton (2010): “The Global Integrated Monetary and Fiscal Model (GIMF) Theoretical Structure,” IMFWorking Paper No. 10/34, International Monetary Fund.

Laeven, Luc and Fabian Valencia (2008): “Systemic Banking Crises: A New Database,” IMF Working Papers No. 08/224, International Monetary Fund.

Lutkepohl, Helmut (2005): New introduction to multiple time series analysis, Springer Verlag, Berlin.

Melecky, Martin and Anca Maria Podpiera (2010): “Macroprudential stress-testing practices of central banks in central and south eastern Europe : an overview and challenges ahead,” Policy Research Working Paper Series No. 5434, TheWorld Bank.

Moody’s (2010): “Corporate Default and Recovery Rates, 1920-2009,” Moody’s Global Credit Research.

OeNB (2010): “Financial Stability Report 19,” Austrian National Bank, Vienna, June 2010.

Papke, Leslie E. and Jeffrey M.Wooldridge (2008): “Panel data methods for fractional response variables with an application to test pass rates,” Journal of Econometrics, 145(1-2), 121–133.

Pesaran, M. Hashem, Til Schuermann, Bjorn-Jakob Treutler and Scott M.Weiner (2006): “Macroeconomic Dynamics and Credit Risk: A Global Perspective,” Journal of Money, Credit and Banking, 38(5), 1211–1261.

Peura, Samu and Esa Jokivuolle (2004): “Simulation based stress tests of banks’ regulatory capital adequacy,” Journal of Banking and Finance, 28(8), 1801–1824.

Reinhart, Carmen M. and Kenneth S. Rogoff (2004): “The Modern History of Exchange Rate Arrangements: A Reinterpretation,” The Quarterly Journal of Economics, 119(1), 1–48.

Sargan, Dennis J. (1958): “The estimation of economic relationships using instrumental variables,” Econometrica, 26(3), 393–415.

Schmieder, Christian, Claus Puhr and Maher Hasan (2011): “Next Generation Balance Sheet Stress Testing,” IMF Working Paper No. 11/83, International Monetary Fund.

Sorge, Marco (2004): “Stress testing Financial Systems: an overview of current methodologies,” BIS Working Papers No. 165, Bank for International Settlements.

Swinburne, Mark (2007): “The IMFs Experience with Macro stress-testing,” Paper presented at ECB High level conference on simulating financial instability, Frankfurt am Main. Available from: http://www.ecb.int/events/pdf/conferences/sfi/Swinburne.pdf.

Turner (2009): “The Turner Review: A regulatory response to the global banking crisis,” Financial Services Authority Report. Available from: http://www.fsa.gov.uk/pubs/other/turner review. pdf.

Virolainen, Kimmo (2004): “Macro stress testing with a macroeconomic credit risk model for Finland,” Research Discussion Papers No. 2004/8, Bank of Finland.

Walti, Sebastien (2005): “The duration of fixed exchange rate regimes,” Discussion Paper No. 96, The Institute for International Integration Studies. Available from: http://ideas.repec.org/p/ iis/dispap/iiisdp96.html.

World Bank (2008): “The Unfolding Crisis: Implications for Financial Systems and their Oversight,” Financial Systems and Development Economics Department. Available from: http://www. worldbank.org/financialcrisis/pdf/UnfoldingCrisis.pdf.