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FrankSun · 2019年12月27日

问一道题:NO.PZ2018070201000054

问题如下:

James Simone is a risk-netural investor. He will apply utility theory to choose the investment portfolio. The table shows the expected return and expected standard deviation of several investments, he is most likely to invest:

选项:

A.

1

B.

2

C.

3

解释:

C is correct

As the investor is risk-neutral, A in the utility function is 0, risk is irrelevant to his choice, so the investment return is the only factor that should be considered. Therefore, Investment 3 has the highest return.

老师,求一下帮助,谢谢

1 个答案
已采纳答案

星星_品职助教 · 2019年12月27日

同学你好,

这道题跟你之前问过的几道题目类似,本质上都是在考察一个公式utility function“U=E(r)-1/2Aσ2,如果是risk-neutral的投资者,A=0。所以风险中性投资者的投资只跟E(r)有关。这种思路解题会很快。

但这道题不用这个公式也可以,因为对于risk-neutral的投资者,是只看收益率的,风险高低无所谓。所以选收益率最高的那个就可以了。

从图像里也可以得到答案,以原版书的图为例,risk-neutral投资者只看重收益,所以是一条横线。



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