NO.PZ2024042601000030
问题如下：
Suppose the hazard rate is constant and equal to 0.090. In this case, each of the following is true except which is false?
选项：
A.The unconditional one-year default probability is 8.6%
The unconditional two-year default probability is 16.5%
The probability of joint event of survival through the first year and default in the second year is 7.9%
The conditional one-year default probability, given survival through the first year, is 17.3%
解释：
The conditional one-year PD is equal to 8.6%, same as the unconditional one-year default probability.
请问老师，选项B The unconditional two-year default probability is 16.5%，为什么是算cumulativePD呢？unconditional PD是两期survival rate相减，不是吗？
