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albee · 2024年07月08日

这题跟No.PZ2023021601000011考的点有啥区别

NO.PZ2023021601000014

问题如下:

When considering a portfolio that is optimal for one investor, a second investor with a higher risk aversion would most likely:

选项:

A.expect a higher variance for the portfolio. B.derive a lower utility from the portfolio. C.have a lower return expectation for the portfolio.

解释:

Utility has two terms: the expected return and a negative term based on the portfolio risk weighted by risk aversion. For an identical portfolio, the investor with a higher risk aversion (A) would calculate a lower utility (U).

为什么在这道题里C选项就不对了

2 个答案

Kiko_品职助教 · 2024年10月29日

嗨,爱思考的PZer你好:


higher risk aversion是更厌恶风险,要结合前后语句去理解哈。“相对更喜欢风险的”意思是相对那些lower risk aversion或者risk seeker。

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努力的时光都是限量版,加油!

Kiko_品职助教 · 2024年07月08日

嗨,爱思考的PZer你好:


这道题稍微有点特殊,需要单独对待一下。题目给了条件,当一个组合对one investor是最优的,那么这个同样的组合对另一个更厌恶风险的投资者来说是怎么样的。说的是同样的组合,对一个人来说是最优的,对另一个人来说是什么样的。这里暗含的意思就是对另一个人这就不是一个最优组合了。那自然这个组合对他来说的爽度更低,所以B选项是最准确的,这道题C选项,你并不能说第二个人他就是对这个组合有更低的回报期待,即使是有着更高风险厌恶的投资者,他也有一个optimal 的portfolio,也是希望在相同风险范围内预期收益是最大的。所以C说的并不准确。

2023021601000011这道题,暗含的意思其实是对于investor来说,他们厌恶风险的程度有高有低,即使是higher risk aversion的,但他们都能找到optimal的portfolio,所以对比的对象是CAL这条线上,相对更喜欢风险的,也就是更高点的那些组合。那么他们的optimal portfolio肯定有一个lower expected return和lower risk tolarance


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虽然现在很辛苦,但努力过的感觉真的很好,加油!

八月的西瓜 · 2024年10月29日

higher risk aversion是更喜欢风险?不是更不喜欢风险??

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