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tzdsgn · 2023年07月10日

可以举个例子吗

NO.PZ2022122801000009

问题如下:

Fox is in the process of hiring an asset allocation analyst and has just completed interviewing two candidates, Ambrose Kelly and Catherine Trainor, for the position.

Fox mentioned to the candidates that when dealing with strategic asset allocation, investors often had difficulty understanding the relevant characteristics of asset classes. They responded:

Ÿ Kelly: I like to stress to clients that asset classes should have high within-group correlations but low correlations with other classes. In addition, because investors need to rebalance to a strategic asset allocation, asset classes need to have both sufficient liquidity and low transaction costs.

Ÿ Trainor: It is important that asset classes should be diversifying. I always look for low pairwise correlations with other asset classes.

In the candidates’ responses to Fox regarding the relevant characteristics of asset classes, the statement that is least accurate is: 2018 Mock AM

选项:

A.

Kelly’s regarding correlations.

B.

Trainor’s.

C.

Kelly’s regarding rebalancing.

解释:

B is correct. Although Trainor is correct that asset classes should be diversifying, low pairwise correlations with other asset classes is not sufficient. An asset class may be highly correlated with some linear combination of the other asset classes even when pairwise correlations are not high. Both of Kelly’s comments are correct: Asset classes should have high within-group correlations but low correlations with other classes. If liquidity and transaction costs are unfavorable for an investment of a size meaningful for an investor, an asset class may not be a suitable investment for that investor.

A is incorrect. Kelly’s first comment is correct about both the within-group and between class correlations.

C is incorrect. Kelly’s second comment is correct. The criteria that he is referring to is that asset classes should have the capacity to absorb a meaningful proportion of an investor’s portfolio. He is correct in saying that if liquidity and transaction costs are unfavorable for an investment of a size meaningful for an investor, an asset class may not be a suitable investment for the investor.


如图 这句话可以举个例子吗

1 个答案

lynn_品职助教 · 2023年07月11日

嗨,努力学习的PZer你好:


这句话考的是pairwise correlation:两两之间的相关性系数。


这里涉及原版书上一个非常细小的结论,diversifying不仅仅要求两两之间相关性系数低,还要求某个资产类型与其它资产大类的组合之间的相关性系数低。


举个栗子,假设有ABC三种资产,不仅A与B、A与C、B与C资产类型两两之间相关性系数低,A与BC组合的相关性系数也要低。


经典题有答案版P10 3.1有讲过。原版书结论用黄色标注:



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