Kim, Joocheol and Lee, Duyeol (2007): Simulation based approach for measuring concentration risk.
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Asymptotic Single Risk Factor (ASRF) model is used to derive the regulatory capital formula of Internal Ratings-Based approach in the new Basel accord (Basel II). One of the important assumptions in ASRF model for credit risk is that the given portfolio is well diversified so that one can easily calculate the required capital level by focusing only on systematic risk. In real world, however, idiosyncratic risk of a portfolio cannot be fully diversified away, causing the so called concentration risk problem. In this paper we suggest simulation based approach for measuring concentration risk using bank capital dynamic model. This approach is especially suitable for a portfolio with relatively small to medium number of obligors and relatively large sized loans
|Item Type:||MPRA Paper|
|Original Title:||Simulation based approach for measuring concentration risk|
|Keywords:||Basel II; ASRF model; credit risk; concentration risk|
|Subjects:||G - Financial Economics > G3 - Corporate Finance and Governance > G33 - Bankruptcy ; Liquidation
G - Financial Economics > G3 - Corporate Finance and Governance > G32 - Financing Policy ; Financial Risk and Risk Management ; Capital and Ownership Structure ; Value of Firms ; Goodwill
G - Financial Economics > G3 - Corporate Finance and Governance > G38 - Government Policy and Regulation
|Depositing User:||Duyeol Lee|
|Date Deposited:||26. Apr 2007|
|Last Modified:||11. Feb 2013 16:43|
Bangia, A, Diebold, F, Kronimus, A, Schagen, C, Schuermann, T(2002): “Ratings migration and the business cycle, with application to credit portfolio stress testing, Journal of Banking and Finance, vol 26, pp 445-474.
Basel Committee on Banking Supervision(2001): The new Basel capital accord, consultative document, Basel, January.
Basel Committee on Banking Supervision(2003): The new Basel capital accord, consultative document, Basel, April.
Basel Committee on Banking Supervision(2006): International convergence of capital measurement and capital standards: a revised freamework, comprehensive version, Basel, June.
Basel Committee on Banking Supervision(2006): Studies on credit risk concentration, working paper, Basel, November.
Board of Governors of the Federal Reserve System (1993): The Herfindahl-Hirshman Index, Federal Reserve Bulletin, March, pp 188-189
Deutsche Bundesbank(2006): Concentration risk in credit portfolios, monthly report, June.
Emmer, S and D Tasche(2003): “Calculating credit risk capital charges with the one-factor model”, Journal of Risk, vol 7, no 2, pp 85-101.
Gordy, M(2000): “A comparative anatomy of credit risk models, Journal of Banking and Finance, vol 24, pp 119-149.
Gordy, M and E Lutkebohmert(2004): “Granularity adjustment in portfolio credit risk measurement”, in G Szego(ed), Risk measures for the 21st Century, Wiley.
J.P. Morgan(1997): CreditMetrics™ - Technical Document, J.P. Morgan, New York
Peura, S and Jokivuolle, E(2003): “Simulation based stress tests of banks’ regulatory capital adequacy”, Journal of Banking & Finance, vol 28, pp1801-1824.
Vasicek, O. A(2002): “Loan Portfolio Value”, Risk Magazine, December, pp 160-162.