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506623496 · 2023年08月23日

能否解释一下这道题两个方法具体的区分点

NO.PZ2023010903000029

问题如下:

The Cherry Street Foundation is a nonprofit institution that provides resources for refugee children around the world. Over the last several years, Cherry Street has experienced a significant increase in donations, resulting in an increase to the foundation's investment portfolio of more than $100 million. Consequently, Ellie Blumenstock, CFA, Cherry Street's founder, recently concluded that the time had come to hire a professional chief investment officer(CIO) to manage this large pool of assets. Today, Blumenstock is interviewing A.J. Gelormini,a portfolio manager with over two decades of experience, for the CIO role.

At the start of the interview, Blumenstock asks Gelormini to explain his approach to investing in global equities. Gelormini's response includes the following statements:

Statement 2: I would build passively managed funds internally through direct investment in individual securities. My focus would be on constructing funds that minimize tracking error versus the benchmark, subject to a constraint that each fund's volatility equals that of its relevant benchmark. Cherry Street would have several such funds, all under $5 million in assets, with benchmarks containing over 2,000 constituents.

Given Gelormini's comments in Statement 2, the best approach he could take to construct passive portfolios for Cherry Street is:

选项:

A.

full replication

B.

stratified sampling

C.

optimization

解释:

Optimization typically involves maximizing a desirable element or minimizing an undesirable characteristic, subject to one or more constraints. In this case, Gelormini has stated that he would build portfolios that would minimize tracking error, subject to a constraint on portfolio volatility.

区分点总是混淆,重复做错

1 个答案
已采纳答案

笛子_品职助教 · 2023年08月23日

嗨,爱思考的PZer你好:


一个是抽样,把portfolio根据行业分类,然后每个行业抽几个股票出来,来代表这个行业。

一个是最优化,事先在某个限制条件下,设定一个最优化目标,然后用数学方法做大量计算,找出符合目标的那个最优portfolio。

如果同学有一定数学基础,可以联系数学里,大学里教的“线性规划”,"线性规划“就是一种最优化的方法。


由于最优化方法,最优化的目标,就是最小化tracking error,因此optimal的trakcing error要比抽样小。


我们结合本题:

1)有限制,constraint that each fund's volatility equals that of its relevant benchmark

2) 有目标:minimize tracking error versus the benchmark


都符合optimization的做法。



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2024-08-15 08:56 1 · 回答

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