问题如下:
Company A issues 20 different bonds, and the default probability of company A is 2%. A porfolio is consisted with the 20 bonds, and the notional value is $1,000,000. Assume that default correlation of the 20 bonds equals to 1 and the recovery rate is 0%.
What is the portfolio's credit VaR at the 99% confidence level ?
选项:
A. $0.
B. $1,000.
C. $20,000.
D. $980,000.
解释:
D is correct.
考点: Credit VaR
解析:因为假设违约的相关系数为1,所以这个组合持有的20只债券可以视作是一只债券,2%的概率违约,98%的概率不违约。99%下WCL=$1,000,000
expected loss =2%*$1,000,000=$20,000
99%的 credit VaR=$1,000,000-$20,000= $980,000
为什么99% confidence level下的WCL等于1 million?