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Alfred · 2023年09月16日

请问这道题怎么理解

NO.PZ2022081802000041

问题如下:

Question When constructing the optimal portfolios for investors with different risk preferences, the investor with the higher risk aversion is most likely to have a:

选项:

A.lower expected return. B.steeper capital allocation line. C.flatter indifference curve.

解释:

Solution

A is correct. The optimal portfolio is identified as the point at which the capital allocation line (CAL) is tangential to the investor’s indifference curve. As investor risk aversion increases, the optimal portfolio slides down the CAL to a point of lower expected risk and lower expected return.

B is incorrect. The capital allocation line is fixed. It does not change based on the preferences of different investors.

C is incorrect. The indifference curve for a more risk averse investor steepens rather than flattens.


何老师在课上讲了,CAL是在EF的基础上引入了无风险资产和每个投资者有不同预期。由于预期不同,产生的EF不同,所以CAL也不同。为什么答案对B选项的解释是"CAL line is fixed"

1 个答案
已采纳答案

Kiko_品职助教 · 2023年09月19日

嗨,爱思考的PZer你好:


B说的确实不太准确,其实是想表达的是,同一条CAL线上,那么风险厌恶程度高的投资者,肯定是会向Rf更靠近的,所以预期收益是更低的。

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虽然现在很辛苦,但努力过的感觉真的很好,加油!