Improved Modeling of Double Default Effects in Basel II - An Endogenous Asset Drop Model without Additional Correlation

Sebastian Ebert and Eva Lütkebohmert

No 24/2009, Bonn Econ Discussion Papers from University of Bonn, Bonn Graduate School of Economics (BGSE)

Abstract: In 2005 the Internal Ratings Based (IRB) approach of `Basel II' was enhanced by a `treatment of double default effects' to account for credit risk mitigation techniques such as ordinary guarantees or credit derivatives. This paper reveals several severe problems of this approach and presents a new method to account for double default effects. This new it asset drop technique can be applied within any structural model of portfolio credit risk. When formulated within the IRB approach of Basel II, it is very well suited for practical application as it does not pose extensive data requirements and economic capital can still be computed

Keywords: Basel II; double default; IRB approach; regulatory capital; structural credit portfolio models (search for similar items in EconPapers)
JEL-codes: G28 G31 (search for similar items in EconPapers)
Date: 2009
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Persistent link: https://EconPapers.repec.org/RePEc:zbw:bonedp:242009

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