Assessing Credit Quality from the Equity Market: Is Structural Approach a Better Approach?
We investigate the empirical performance of default probability prediction based on Mertons (1974) structural credit risk model. More specifically, we study if Mertons default measure, represented by distance-to-default, is a suf- ficient statistic to reflect the equity market information concerning the credit quality of the debt issuing firm. Employing the same information set, we show that a simple reduced form model outperforms Merton type of models for both in sample fitting and out of sample predictability for credit ratings. Both in-sample fitting and out-of-sample predictability can be greatly improved by including the firms equity value as an additional independent variable to the structural model. Moreover, the empirical performance of this hybrid model is very similar to that of the simple reduced form model. As a result, we conclude that although structural models are theoretically sound and distance-to-default is an important factor that determines the credit quality of the debt issuing firm, it does not adequately capture all the information from the equity market concerning the firms credit quality.
Credit Rating Default Probability Distance-to-Default Structural Credit Risk Model
Yu Du Wulin Suo
RBC Financial Group Queens University
国际会议
成都
英文
2007-07-09（万方平台首次上网日期，不代表论文的发表时间）