题目
Calculate the probability of a subsidiary and parent company both defaulting over the next year. Assume that the subsidiary will default if the parent defaults, but the parent will not necessarily default if the subsidiary defaults. Also assume that the parent has a one-year probability of default of 0.50% and the subsidiary has a one-year probability of default of 0.90%.
选项
A.0.450%
B.0.500%
C.0.545%
D.0.550%
答案
B
解析
Since the subsidiary will default if the parent defaults, the joint default probability is 0.5% that the parent will default.因为如果母公司违约，子公司将违约，所以联合违约概率为母公司违约的0.5％。