Stochastic evolution equations in portfolio credit modelling with applications to exotic credit products
AbstractWe consider a structural credit model for a large portfolio of credit risky assets where the correlation is due to a market factor. By considering the large portfolio limit of this system we show the existence of a density process for the asset values. This density evolves according to a stochastic partial differential equation and we establish existence and uniqueness for the solution taking values in a suitable function space. The loss function of the portfolio is then a function of the evolution of this density at the default boundary. We develop numerical methods for pricing and calibration of the model to credit indices and consider its performance pre and post credit crunch. Finally, we give further examples illustrating the valuation of exotic credit products, specifically forward starting CDOs.
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Bibliographic InfoPaper provided by arXiv.org in its series Papers with number 1103.4947.
Date of creation: Mar 2011
Date of revision: Apr 2011
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Web page: http://arxiv.org/
This paper has been announced in the following NEP Reports:
- NEP-ALL-2011-04-02 (All new papers)
- NEP-CMP-2011-04-02 (Computational Economics)
- NEP-RMG-2011-04-02 (Risk Management)
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- Kay Giesecke & Konstantinos Spiliopoulos & Richard B. Sowers & Justin A. Sirignano, 2011. "Large Portfolio Asymptotics for Loss From Default," Papers 1109.1272, arXiv.org, revised Oct 2013.
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