NO.PZ2019042401000005
问题如下:
Stocks A, B, and C are in the benchmark portfolio. Assume a manager forecasts returns on stocks A, B, and D. Stock C is in the benchmark but not in the forecast. Stock D is in the forecast but not in the benchmark. Which of the following is least accurate?
选项:
A.the manager should assign zero weight to stock C.
B.the manager should assign zero weight to stock D.
C.the weight assigned to stock C can be calculated from the alphas of the forecasted asset.
D.the weights assigned to stock C and D are not equal.
解释:
D is correct.
考点:Proper Alpha Coverage
解析:首先要注意题目中要求选出错误选项。
对于有预测但不在基准中的股票(Stock D),应为其分配的权重为0。对于没有预测但在基准中的股票(Stock C),应为其分配权重为0。
对于没有预测但在基准中的股票(Stock C),也可以为其分配权重为foretasted asset alphas的函数。
因此选项D是错误的,因为Stock C应分配的权重为与Stock D应分配的权重均为0,所以选项D说他们应分配的权重are not equal,错误。
其他选项的说法都是正确的。
在基准的股票C分配0的权重不是会让组合经理的 α 变低嘛,因为主动投资基金经理是把资金用在他认为更赚钱的股票D上面了,C股票权重调整0,会扭曲基金经理的业绩呀