Modeling the Credit Contagion Channel and Its Consequences Via the Standard Portfolio Credit Risk Model

Using actual default events for all listed firms of thirty economies over the period 2000 Q1 to 2011 Q2 and the technique of particle filtering and smoothing with the Markov chain Monte Carlo, we find strong evidence that defaults of small high-yield firms infect large high-yield firms, which, in turn, generates a contemporaneous feedback effect on small high-yield firms. We demonstrate that this type of credit contagion has a significant impact on the infected group’s defaults and tail estimates of portfolio loss. All high-yield groups have systematic risk factors that exhibit a strong AR (1) effect, which is evidence of within-group default clustering. All investment-grade firms are not affected by this channel of credit contagion. In general, the lower grade high-yield firms have a higher default threshold in terms of asset value. Small firms are more vulnerable to default than large firms, and their defaults could serve as an early warning signal for system-wide credit contagion.

[1]  K. Giesecke,et al.  Self-Exciting Corporate Defaults : Contagion vs . Frailty , 2008 .

[2]  Branko Ristic,et al.  Beyond the Kalman Filter: Particle Filters for Tracking Applications , 2004 .

[3]  K. Giesecke,et al.  Credit Contagion and Aggregate Losses , 2004 .

[4]  Alexander J. McNeil,et al.  Bayesian inference for generalized linear mixed models of portfolio credit risk , 2007 .

[5]  Cornell University,et al.  Cyclical correlations , credit contagion , and portfolio losses , 2003 .

[6]  M. Davis,et al.  Infectious defaults , 2001 .

[7]  D. Duffie,et al.  Common Failings: How Corporate Defaults are Correlated , 2006 .

[8]  Estimating Credit Contagion in a Standard Factor Model , 2008 .

[9]  Oldrich A Vasicek.  Limiting Loan Loss Probability Distribution , 2015 .

[10]  A. Doucet,et al.  A Tutorial on Particle Filtering and Smoothing: Fifteen years later , 2008 .

[11]  A. Cousin,et al.  An extension of Davis and Lo's contagion model , 2009, 0904.1653.

[12]  Philippe Jorion,et al.  Good and Bad Credit Contagion: Evidence from Credit Default Swaps , 2006 .

[13]  Oldrich A Vasicek,et al.  Probability of Loss on Loan Portfolio , 2015 .

[14]  R. C. Merton,et al.  On the Pricing of Corporate Debt: The Risk Structure of Interest Rates , 1974, World Scientific Reference on Contingent Claims Analysis in Corporate Finance.

[15]  Tao Wang,et al.  Multiperiod Corporate Default Prediction - A Forward Intensity Approach , 2012 .

[16]  Larry H. P. Lang,et al.  Contagion and competitive intra-industry effects of bankruptcy announcements , 1992 .

[17]  Philippe Jorion,et al.  Credit Contagion from Counterparty Risk , 2008 .

[18]  John Geweke,et al.  Evaluating the accuracy of sampling-based approaches to the calculation of posterior moments , 1991 .

[19]  D. Duffie,et al.  Frailty Correlated Default , 2006 .