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Basel Zhang · 2023年06月21日

这里面有mental accounting吗?不是考虑了分散化了吗?

NO.PZ2023012803000022

问题如下:

Owen and Yang meet with Callie Steven, an upper level executive with AutoPay, a small but fast growing privately held company. She has been employed with AutoPay for more than 15 years and as a result, her holdings in AutoPay are estimated to be more than 30% of her total portfolio. She believes that over the next several years AutoPay will put together an initial public offering, resulting in a huge windfall. She states that she has a significant portion of her portfolio in short-term bonds and money market funds to offset the risk of her AutoPay shares. Owen points out to Steven that her current portfolio is subject to mental accounting, is not constructed in layers, and does not take into consideration covariance between assets.

Is Owen’s comment regarding Steven’s current portfolio correct?

选项:

A.

No, he is incorrect with regard to portfolio construction.

B.

Yes.

C.

No, he incorrect with regard to covariance between assets.

解释:

Owen’s comment regarding Steven’s current portfolio construction is not correct. Her current portfolio is subject to mental accounting, has been constructed in layers and does not take into consideration covariance between assets.

She states that she has a significant portion of her portfolio in short-term bonds and money market funds to offset the risk of her AutoPay shares.


这不是把bonds, money market funds和AutoPay shares放在一起考虑抵消shares的风险了吗?怎么会是mental accounting呢?


而且bonds,和money market funds和AutoPay shares的相关性也不大啊,是考虑了covariance呀。

3 个答案

王琛_品职助教 · 2023年08月31日

嗨,从没放弃的小努力你好:


@35506

照这么说,只要是不同asset class,就是mental accounting了?

其实核心是根据资金来源或用途分层

出题人为了使题目严谨,都会再说明持有不同 asset class 的目的

比如这道题:客户持有后两类产品的目的,是为了抵消股票的风险 "to offset the risk",所以可以认为是从「资金用途」的角度构建组合

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虽然现在很辛苦,但努力过的感觉真的很好,加油!

王琛_品职助教 · 2023年08月28日

嗨,爱思考的PZer你好:


@pepperh** 

请教老师,关于mental accounting,那是不是说:

(1)比较明显的mental accounting:基于wealth来进行分配,不同目标有不同账户,各自账户进行MVO;

(2)潜在的mental accounting:只要组合中包括的资产类型是比较明确的(比如本题是“客户的组合包含三类产品:AutoPay 的股票、短期债券 short-term bond、货币市场基金 short-term bond”)那也可以理解为一种mental accounting

可以的,其实第二点可以看成是第一点的一个例子

mental accounting 本质是投资者的投资组合,会按照「资金来源」或者「资金用途」分类哈

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加油吧,让我们一起遇见更好的自己!

王琛_品职助教 · 2023年06月25日

嗨,爱思考的PZer你好:


1)She states that she has a significant portion of her portfolio in short-term bonds and money market funds to offset the risk of her AutoPay shares.

这不是把bonds, money market funds和AutoPay shares放在一起考虑抵消shares的风险了吗?怎么会是mental accounting呢?

有时候题干,并不会「直接」说,客户的投资组合,是按照资金来源或者资金用途分类,所以没有出现关键词 the source of the money 或 the planned use of the money 也很正常,因为这样考查知识点,太直白了

同学已经分析到,客户的组合包含三类产品:AutoPay 的股票、短期债券 short-term bond、货币市场基金 short-term bond,可以继续分析不同金融产品的特点

题干也说了,客户持有后两类产品的目的,是为了抵消股票的风险 "to offset the risk",所以可以认为是从「资金用途」的角度构建组合

2)而且bonds,和money market funds和AutoPay shares的相关性也不大啊,是考虑了covariance呀。

因为关于组合中的资产分类及权重,并不是 Steven 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,Steven 按照 mean variance,通过研究得出最优化的权重, 所以达不到 Owen mean-variance 定义下的 diversification

详细解题思路,请同学先参考一下:https://class.pzacademy.com/qa/61765

如果还有疑问,可以追问或者评论,我再回答同学的后续疑问哈

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努力的时光都是限量版,加油!

pepperhyp · 2023年08月26日

请教老师,关于mental accounting,那是不是说: (1)比较明显的mental accounting:基于wealth来进行分配,不同目标有不同账户,各自账户进行MVO; (2)潜在的mental accounting:只要组合中包括的资产类型是比较明确的(比如本题是“客户的组合包含三类产品:AutoPay 的股票、短期债券 short-term bond、货币市场基金 short-term bond”)那也可以理解为一种mental accounting

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