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滴滴姐姐~ · 2022年09月04日

来问问naive diversification。。。

NO.PZ2022052301000009

问题如下:

Arzac asks Pak to describe how he has constructed his investment portfolio over time. He informs Arzac that 12 years ago his employer offered him company shares at a discount, but share prices declined because the company wasn’t performing as well as expected. He decided he would rather construct his investment portfolio by investing in three mutual funds he had analyzed, two of which were balanced funds and the third a global equity fund. Pak allocated one-third of his available funds to each of the mutual funds. Pak then describes how over the last five years, he has reviewed his portfolio each year, leading to a higher allocation in global securities over time on the understanding they would help reduce overall risk.

Which behavioral factor most likely impacted Pak’s decisions on how to construct his investment portfolio over time?

选项:

A.

Naive diversification

B.

Home bias

C.

Familiar investing

解释:

Pak constructed his initial investment portfolio through the equal distribution of mutual funds, reflecting simple heuristics or a framing bias. This is an example of a naive diversification strategy (i.e., dividing assets equally among available funds irrespective of the underlying composition of the funds). The equal distribution may also reflect a fear of regret: Pak doesn’t understand which fund will outperform, so he decides to invest in all three equally.

B is incorrect because Pak has been increasing his exposure to global securities over time, as he wants to reduce risk by increasing his diversification by investing outside his home market. He does not have a home bias.

C is incorrect because Pak did not purchase an investment on the basis of familiarity but declined to purchase his employer’s stock because he felt the company was not performing to expectations.

这道题后面不又说。。他不断review他的portfolio,然后增加了global portfolio的权重。。。

那我就觉得他本来是naive diversification的,但后来改过来了呀,就没有naive了呀。。


那我就用的排除法选了familiar investing 再来康康这个哈

题目说invest in the funds he had analyzed... (这个过去完成时,过去的过去难道不是理解成 他以前研究过这些股票所以买了。。。)

就很familiar investing啊0.0

IVALAINE · 2023年01月29日

我同意 我也这么想的,题目问的是impacted xxx decision "over time" 他初期怎么naive diversification并不是over time他调整的表现 我觉得三个选项都不好

3 个答案

王琛_品职助教 · 2023年08月05日

嗨,从没放弃的小努力你好:


@005

请问naive diversification是根据原文“Pak allocated one-third of his available funds to each of the mutual funds”这句判断的吗?感觉这句也理解为Pak把自己三分之一的可用资金分配给了每个共同基金(并没有说是否均分)。 

是通过同学引用的原文,是均分哈

"Park allocated one-third of his available funds to each of the mutual funds."

Park 将其可用资金的三分之一分配给每个共同基金

available funds 就是可以用来投资的钱,one-third of ... 就是说每个基金买了 1 / 3

一共买了三支,每支买三分之一,所以确实是 naive diversification 

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就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

王琛_品职助教 · 2023年01月29日

嗨,努力学习的PZer你好:


@IVALAINE

我同意 我也这么想的,题目问的是impacted xxx decision "over time"

他初期怎么naive diversification并不是over time他调整的表现  

我觉得三个选项都不好  

1

同学这么想也可以

有时候我们会遇到一些题目,三个选项好像选不出「完全」符合题意的,那只能选出三个里面「最」符合题意的了

选项 B 和 C,相比选项 A 更加不符合题意,所以只能选 A 了

2

遇到这种题目,我们把握好题目考查的知识点原理即可,建议尽量不花时间纠结题干或者选项的表述哈

考试时,题干和选项的表述都是非常严谨的,不会出现这种情况的

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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 · 2022年09月05日

嗨,从没放弃的小努力你好:


1) 那我就用的排除法选了familiar investing 再来康康这个哈。题目说invest in the funds he had analyzed... (这个过去完成时,过去的过去难道不是理解成 他以前研究过这些股票所以买了。。。就很familiar investing啊0.0

先回答这个问题哈

其实原版书中,并没有提到 familiar investing 这个名词,根据字面意思,是对哪个资产熟悉,就投资哪类资产

题干第二句话开始提到,12 年前,Pak 的雇主,以折扣价向他提供了公司股票,但由于公司业绩不如预期,股价下跌

于是 Pak 决定,宁愿通过投资于他分析过的三个共同基金来构建他的投资组合

相比于基金组合,Pak 肯定是更熟悉自己的公司

但是并没有因为熟悉自己的公司,就买自己公司的股票,而是买入了其他基金组合

所以不能算是 familiar investing 哈,这是干扰项

2)这道题后面不又说。。他不断review他的portfolio,然后增加了global portfolio的权重。。。那我就觉得他本来是naive diversification的,但后来改过来了呀,就没有naive了呀。。

其实后面那句话,主要是用于排除选项 B 的

因为增加了全球股票基金的持仓,所以没有反映 home bias

而前面的题干,关于组合初始化的比例,才是反映选项 A 的,正如同学之前的分析

----------------------------------------------
就算太阳没有迎着我们而来,我们正在朝着它而去,加油!

005 · 2023年08月04日

请问naive diversification是根据原文“Pak allocated one-third of his available funds to each of the mutual funds”这句判断的吗?感觉这句也理解为Pak把自己三分之一的可用资金分配给了每个共同基金(并没有说是否均分)。

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