An extended CreditRisk+ framework for portfolio credit risk management

The independent sector assumption in the CreditRiskC model has been a major obstacle to its implementation. Attempts to overcome this limitation have not met with much success. This paper proposes an extension of the original model that accommodates a wide range of sector covariance structures. Existing numerical algorithms designed for the original model can be reused with little modification. Case studies demonstrate that our model outperforms other CreditRiskC variants that allow sector dependency. A simulation version of our model is also introduced, which is in turn used to find an optimal portfolio allocation based on the work of Andersson et al. The simulation error is very small compared with the model’s analytic counterpart, and the optimization significantly reduces portfolio credit risk.
Publisher
Incisive Media
Issue Date
2008-12
Language
ENG
Citation

JOURNAL OF CREDIT RISK, v.4, no.4, pp.63 - 80

ISSN
1744-6619
URI
http://hdl.handle.net/10203/87369
Appears in Collection
MT-Journal Papers(저널논문)
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