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陆大善人 · 2021年02月28日

Gross exposure

NO.PZ2019012201000075

问题如下:

Chen and Garcia next discuss characteristics of long–short and long-only investing. Garcia makes the following statements about investing with long–short and long-only managers:
Statement 1 A long–short portfolio allows for a gross exposure of 100%.
Statement 2 A long-only portfolio generally allows for greater investment capacity than other approaches, particularly when using strategies that focus on large-cap stocks.
Which of Garcia’s statements regarding investing with long–short and longonly managers is correct?

选项:

A.

Only Statement 1

B.

Only Statement 2

C.

Both Statement 1 and Statement 2

解释:

C is correct. Both Statement 1 and Statement 2 are correct.Statement 1 is correct because, similar to a long-only portfolio, a long–short portfolio can be structured to have a gross exposure of 100%. Gross exposure of the portfolio is calculated as the sum of the long positions and the absolute value of the short positions, expressed as percentages of the portfolio’s capital.
Gross exposure = Long positions + |Short positions|
Gross exposure long-only portfolio = 100% (Long positions) + 0% (Short positions) = 100%
Gross exposure long–short portfolio = 50% (Long positions) + |–50%| (Short positions) = 100%
Statement 2 is correct because long-only investing generally offers greater investment capacity than other approaches, particularly when using strategies that focus on large-cap stocks. For large institutional investors such as pension plans, there are no effective capacity constraints in terms of the total market cap available for long-only investing.

请问老师 为什么long/short gross exposure 是100% 最大呢? 我以为是net 最大100%。  我的理解 你可以 long 100% 再short 100%, 所以exposure是200% 啊? Gross exposure 与net exposure 有啥不同呢  谢谢

1 个答案

maggie_品职助教 · 2021年03月01日

嗨,努力学习的PZer你好:


1.      同学,注意哦Statement 1说的是同时做多做空的组合“允许(allow)”gross exposure等于100%,而非gross exposure最大是100%。

2.      Gross exposure 与net exposure 有啥不同呢?

gross exposure= |Long positions| + |Short positions| 即long 的权重加上short 的权重的绝对值

net exposure= |Long positions| - |Short positions| 即long 的权重减去short 的权重的绝对值

3.      当long/short 50/50,即买50/卖50时,gross exposure=100%。因此Statement 1的说法正确。

4.      回答你的举例 long 100% 再short 100%即long/short 100/100,gross exposure=200%,net exposure=0。

如下讲义(P224)截图供你参考,建议再复习下这部分的视频课程:

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加油吧,让我们一起遇见更好的自己!

陆大善人 · 2021年03月02日

谢谢老师你真棒!

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