[单选题] 提问人:匿名网友 提问时间:2021-08-23

(2007年)已知某种证券收益率的标准差为0.2,当前的市场组合收益率的标准差为0.4,两者之间的相关系数为0.5,则两者之间的协方差是( )。


A .0.04
B .0.16
C .0.25
D .1.00

提问人:匿名网友 提问时间:2021-08-23

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