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pumi · 2023年10月16日

为什么a不对呢

NO.PZ2018070201000111

问题如下:

Which of the following makes the existence of market portfolio in the capital market theory?

选项:

A.

All investors are price takers.

B.

All investors have homogeneous expectations.

C.

All investors have the same, single holding period.

解释:

B is correct.

Homogeneous expectations assumption claims that all investors are rational and would use the same way to analyze securities, meaning that all investors adopt the same probability distributions, the same inputs for future cash flows and would finally reach to the same valuations for the securities. As a consequence, the market portfolio, which is also perceived as the same optimal risky portfolio, is generated.

为什么a不对啊,不是我记得有一个investor price taker的条件

1 个答案

Kiko_品职助教 · 2023年10月16日

嗨,爱思考的PZer你好:


这道题并不是问CAPM假设的,而是问哪个假设才会导致market portfolio的存在。只有B选项所有投资者对市场有相同的期望才可以,不然CML线会有无数多条。

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