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Claudia66 · 2020年03月24日

问一道题: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:

A 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 forecasted asset alphas 的函数。因此选项A是错误的,Stock C应分配的权重为 forecasted asset alphas 的函数,不等于0。其他选项的说法都是正确的。

这个求权重的办法能用中文解释一下吗,就是翻译一下,看的有点不太明白,谢谢老师

1 个答案

品职答疑小助手雍 · 2020年03月24日

同学你好,这个解析就是中文的,我这说一下意思其实和解析还是差不多的。

其实就是假设ABC在benchmark里,但是你要预测ABD。这里benchmark之所以是benchmark其实就意味着它是不变的,所以C的权重依旧保留。而D的权重则可以分配成0。

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