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moon · 2021年11月18日

选哪个组合

* 问题详情,请 查看题干

NO.PZ201511190100001101

问题如下:

Determine, assuming Ly’s bias conclusion is correct, which portfolio Olssen would most likely select.(circle one)

Portfolio 1

Portfolio 2


Justify your response.

选项:

解释:

Olssen would most likely select Portfolio 2.

●A mental accounting bias suggests that Olssen might consider his investments in layers.

●Portfolio 2 has the same income, expected return, and Sharpe ratio as Portfolio 1 and is structured in layers.

The results of the risk tolerance questionnaire suggest that Olssen exhibits a mental accounting bias. He likely compartmentalizes his portfolio into discrete layers of low-risk assets versus risky assets without regard to the correlations among the assets. Portfolio 2 is constructed in this way, with discrete layers for each objective, while Portfolio 1 is constructed to be mean–variance optimized. As a result, Olssen would most likely select Portfolio 2, particularly because it has the same income, expected return, and Sharpe ratio as Portfolio 1.

因为这两个组合income一样,所以要追求capital growth大的,风险中等的,分层构建的那个。


所以选择组合1,因为组合2有高风险fund,而且像bond这样投资产品capital growth低


难道不是选1嘛?

2 个答案

王琛_品职助教 · 2021年11月20日

嗨,爱思考的PZer你好:


分层组合讲义说会less diversification,但是根据这套题目,分层不就是买了各种不同类别资产,那么分散化应该很好啊

1

关于组合 2 中的资产分类及权重,并不是基金经理 Ly 基于均值方差分析和对资产之间协方差的考虑,所构建的多元化投资组合

题目没有交代说,Ly 按照 mean variance,通过研究得出最优化的权重, 所以达不到 mean-variance 定义下的 diversification

投资组合 2 可能看起来很分散,但分散化是附带的,不一定是投资组合构建的目标

"The resulting portfolio may appear well-diversified, but diversification is incidental to and not necessarily an objective of the portfolio construction."

2

也请参考:MOCK-2017-PM-9,收录于经典题 The Behavioral Biases of Individuals 章节的 1.11 题,解析请参考:https://class.pzacademy.com/qa/61765

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王琛_品职助教 · 2021年11月19日

嗨,努力学习的PZer你好:


1

不是的

这道题的关键词是 mental accounting bias

2

首先,题目的问法是:假设 Ly 对客户行为偏差的结论是正确的 "assuming Ly’s bias conclusion is correct"

那我们就要回到题目,找到对应的关键词,到底 Ly 对客户的行为偏差的结论是什么?

对应题干:Ly 总结第一个客户 Olssen 的特点是:中等程度的风险厌恶,且有 mental accounting bias

3

相当于如果客户有 mental accounting bias,那么他会在两个组合中选哪一个?

也就是考查 mental accounting bias 的偏差结果

所以,是选有分层的组合,即组合 2 哈

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