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skye · 2024年10月13日

不太理解,请问考察的是哪个知识点,谢谢

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NO.PZ202208260100000709

问题如下:

VFO is concerned about the potential for increasing interest rates in the future. Which of the following statements provides the most correct description as to how rising rates after entering into the two option strategies would affect the option valuations?

选项:

A.Rising risk-free rates would make the selling a call option strategy more advantageous to VFO because call options increase in value with higher risk-free rates. B.Rising risk-free rates would make the buying a put option strategy more advantageous to VFO because the company locks in the put option premium at lower interest rates. C.Rising risk-free rates are a negative for both option strategies.

解释:

C is correct. Because both option strategies (buy a put or sell a call) are short strategies, VFO is delaying cash inflows so higher risk-free rates are negative. A is incorrect as this statement describes the value effect from buying a call option, not from selling. B is incorrect as the locked-in premium will decline after rising risk-free rates.

不太理解,请问考察的是哪个知识点,正常short call获得期权费,rf变大,不是获利么,A为什么不对呢

1 个答案

李坏_品职助教 · 2024年10月13日

嗨,从没放弃的小努力你好:


题目的背景是VFO正在考虑在未来6个月之后以300.84的远期价格卖出股票,当前的无风险利率是4%。

实际上VFO就是在考虑做空股票,现在提供两种做空的方案:

  1. 现在去sell call option。
  2. 现在去buy put option。


如果现在有人已经buy call了,rf未来上升,那么call的价值上升,buy call的人是赚钱的。但是方案1说的是sell call,这是call的空头,反而会在rf上升时亏钱。所以A不对。


put会在rf上升时价值下降,也是亏钱的,所以两个方案在rf上升时都不好。

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