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nanaluo · 2021年10月24日

本题的考点是否为讲义549页的公式?是的话公式中的standard deviation为什么可以忽略?

NO.PZ2020021205000043

问题如下:

A delta-neutral portfolio has a gamma of -20. The price of the underlying asset suddenly increases by USD 3. Estimate what happens to the value of the portfolio. What difference does it make if the price of the underlying asset suddenly decreases by USD 3?

选项:

解释:

The USD value of the portfolio will change by: 1/2X (-20) X 3^2= -90

The change in the value of the portfolio is the same if the value of the underlying asset decreases by USD 3.

本题的考点是否为讲义549页的公式?是的话公式中的standard deviation的平方为什么可以忽略?

1 个答案
已采纳答案

DD仔_品职助教 · 2021年10月24日

嗨,努力学习的PZer你好:


是这个公式,他没有忽略,只是变了个形。

资产价格上升了3块钱,其实就是S*sigma,也就是资产价格的变动。

具体如图:


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努力的时光都是限量版,加油!

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