NO.PZ2022122601000065
问题如下:
O'Reilly presents the factor covariance matrix for global equity andglobal bonds shown in Exhibit 1 and market factor sensitivities and residualrisk shown in Exhibit 2.
Given the data in Exhibits1 and 2, the covariance between Market 1 and Market 2 is closest to:
选项:
A.0.0027
B.0.0243
C.0.0225
解释:
Correct Answer: B
The covariancebetween Market 1 and Market 2 is calculated as follows:
M12 =(1.20 × 0.90 × 0.0225) + (0 × 0 × 0.0025) + [(1.20 × 0) + (0 × 0.90)] × 0.0022= 0.0243.
中文解析:
市场1和市场2的协方差计算如下:
M12 =(1.20×0.90×0.0225)+ 0(0××0.0025)+[(1.20×0)+(0×0.90)]×0.0022 = 0.0243。
老师,我理解的是market 1和market 2的残差不相关,所以不考虑残差的方差。 如果是只有一个market,比如单看market 1,那残差项的方差就要算上,对吗?