这两个方法具体是什么

问题如下：

When calculating the probability of default of economic capital, you can choose two ways: A point-in-time (PIT) probability of default and the through-the-cycle (TTC) probability of default. Different calculation indicators apply to different scenarios. Which of the following options is correct?

选项：

A.

A point-in-time (PIT) approach should be used to compute long-term expected losses.

B.

A point-in-time (PIT) approach is more likely to result in a lower volatility of capital compared to the TTC approach.

C.

Compared with the capital calculated using the PIT method, the capital calculated by the TTC method will have a smaller volatility.

D.

When companies calculate default probabilities in order to make strategic decisions, they should use the PIT approach.

解释：

C is correct.

考点：PIT & TTC

解析：A选项：计算长期的预期损失时，应该考虑到经济周期的影响，所以应该使用through-the-cycle TTC方法。

B选项：应该是考虑了整个经济周期的TTC方法算出的capital的波动率更小。

D选项：战略决定应该考虑长期，所以应该使用TTC方法。