Is Current Capital Regulation Based on Conservative Risk Assessment?
AbstractWe criticize the popular view that separately calculating regulatory capital for market and credit risk yields a conservative aggregate risk assessment. We show that this view depends on a flawed intuition about diversification effects that arise between subportfolios. If a bank’s portfolio cannot be neatly divided into two subportfolios along the lines of market and credit risk, simply adding up the respective results may cause the true portfolio risk to be underestimated. Using the example of foreign currency loan portfolios, we show that this underestimation can be quantitatively significant.
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Bibliographic InfoArticle provided by Oesterreichische Nationalbank (Austrian Central Bank) in its journal Financial Stability Report.
Volume (Year): (2008)
Issue (Month): 15 ()
Postal: Oesterreichische Nationalbank, Documentation Management and Communications Services, Otto-Wagner Platz 3, A-1090 Vienna, Austria
Find related papers by JEL classification:
- G28 - Financial Economics - - Financial Institutions and Services - - - Government Policy and Regulation
- G32 - Financial Economics - - Corporate Finance and Governance - - - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure; Value of Firms; Goodwill
- G20 - Financial Economics - - Financial Institutions and Services - - - General
- C15 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Statistical Simulation Methods: General
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