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假设某投资者持有A、B、C三只股票。三只股票的β系数分别为1．2、0．9和1．05，其资金分配分别是100万元、200万元和300万元，则该股票组合的β系数为（）。

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A、1.025

B、0.95

C、1.5

D、0.85

参考答案:

A

该股票组合的β系数为：β=X1β1+X2β2+X3β3=(1．2100+0．9200+1．05300)(100+200+300)=1．025。

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