Default Risk in Corporate Yield Spreads
重新审视了公司债券收益率利差中违约风险的占比问题，发现该比例对违约概率的期限结构估计敏感，调整估计期和回收率时占比可能变大。
An important research question examined in the credit risk literature focuses on the proportion of corporate yield spreads attributed to default risk. This topic is reexamined in light of the different issues associated with the computation of default probabilities obtained from historical default data. We find that the estimated default risk proportion in corporate yield spreads is sensitive to the ex ante estimated term structure of default probabilities used as inputs. This proportion can become a large fraction of the spread when sensitivity analyses are made with respect to the period over which the probabilities are estimated and the recovery rates.