NO.PZ2016082405000066
问题如下:
Which of the following statements about cumulative and marginal default probabilities is most accurate?
选项: Both functions increase over time.
Neither function increases over time.
C.Only the cumulative default probabilities increase over time.
D.Only the marginal probabilities increase over time.
解释:
C The cumulative default probability function begins at zero and eventually reaches 100% and must therefore increases over time. Marginal probabilities of default are always positive but are not necessarily increasing over time.
为什么Marginal PD不会一直增加呢?之前老师讲过如果一家信用质量比较好的公司他的Marginal PD会越来越大