Stress Testing Credit Risk: The Great Depression Scenario
AbstractBy using Moody's historical corporate default histories we explore the implications of scenarios based on the Great Depression for banks' economic capital and for existing and proposed regulatory capital requirements. By assuming different degrees of portfolio illiquidity, we then investigate the relationship between liquidity and credit risk and employ our findings to estimate the Incremental Risk Charge (IRC), the new credit risk capital add-on introduced by the Basel Committee for the trading book. Finally, we compare our IRC estimates with stressed market risk measures derived from a sample of corporate bond indices encompassing the recent financial crisis. This allows us to determine the extent to which trading book capital would change in stress conditions under newly proposed rules. We find that, typically, banking book regulation leads to minimum capital levels that would enable banks to withstand Great Depression-like events, except when their portfolios have long average maturity. We also show that although the IRC in the trading book may be considerable, the capital needed to absorb market risk related losses in stressed scenarios can be more than twenty times larger.
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Bibliographic InfoPaper provided by Henley Business School, Reading University in its series ICMA Centre Discussion Papers in Finance with number icma-dp2010-03.
Length: 51 pages
Date of creation: Mar 2010
Date of revision:
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Credit Risk; Financial Crisis; Economic Capital; Basel II; Liquidity Risk;
Find related papers by JEL classification:
- G11 - Financial Economics - - General Financial Markets - - - Portfolio Choice; Investment Decisions
- G21 - Financial Economics - - Financial Institutions and Services - - - Banks; Other Depository Institutions; Micro Finance Institutions; Mortgages
- G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies
- 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
This paper has been announced in the following NEP Reports:
- NEP-ALL-2010-05-22 (All new papers)
- NEP-BAN-2010-05-22 (Banking)
- NEP-FMK-2010-05-22 (Financial Markets)
- NEP-HIS-2010-05-22 (Business, Economic & Financial History)
- NEP-REG-2010-05-22 (Regulation)
- NEP-RMG-2010-05-22 (Risk Management)
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