Zhao, Hongbiao (2011) Portfolio credit risk of default and spread widening. . The Author. (Submitted)
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Abstract
This paper introduces a new model for portfolio credit risk incorporating default and spread widening in a simple and consistent framework. Credit spreads are modelled by geometric Brownian motions with a dependence structure powered by a t-copula. Their joint evolution drives the spreads widening and triggers defaults, and then the loss can be calculated accordingly. It is a heterogeneous model that takes account of different credit ratings and term structures for each underlying spread. This model is applicable to portfolio credit risk management, stress test, or to fit into regulatory capital requirements. The procedures of parameter calibration and scenario simulation are provided. A detailed example is also given to see how this proposed model can be implemented in practice.
| Item Type: | Monograph (Report) |
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| Official URL: | http://www2.lse.ac.uk/fmg/home.aspx |
| Additional Information: | © 2011 The Author |
| Divisions: | Statistics |
| Subjects: | H Social Sciences > HB Economic Theory H Social Sciences > HG Finance |
| JEL classification: | C - Mathematical and Quantitative Methods > C3 - Econometric Methods: Multiple; Simultaneous Equation Models; Multiple Variables; Endogenous Regressors > C30 - General C - Mathematical and Quantitative Methods > C5 - Econometric Modeling > C51 - Model Construction and Estimation G - Financial Economics > G1 - General Financial Markets > G18 - Government Policy and Regulation G - Financial Economics > G3 - Corporate Finance and Governance > G32 - Financing Policy; Financial Risk and Risk Management; Capital and Ownership Structure |
| Date Deposited: | 04 May 2012 08:52 |
| Last Modified: | 12 Dec 2024 05:54 |
| URI: | http://eprints.lse.ac.uk/id/eprint/43451 |
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