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mino酱是个小破货 · 2023年10月26日

麻烦老师解释下C选项,不是厌恶风险吗?在那种情况下,就put option被高估也应该买入啊,谢谢

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NO.PZ202208100100000104

问题如下:

In her statement to Patel, Cho is most likely correct regarding the:

选项:

A.

volatility skew.

B.

volatility smile.

C.

risk-reversal strategy.

解释:

A is correct. Cho correctly describes the volatility skew. Implied volatility for out-of-the-money (OTM) put options is higher than for at-the-money (ATM) put options and increases as the strike price moves further away from the current stock price. Implied volatilities for OTM call options are lower than for ATM call options and decrease as strike prices rise above the current stock price.

B is incorrect. Cho is incorrect about the volatility smile. The volatility smile occurs when OTM call and put option volatilities are higher than ATM option volatilities and are also higher than normal volatilities for OTM put and call options.

C is incorrect. Cho is incorrect about the long risk-reversal strategy; in fact, she describes a short risk-reversal strategy. If the put-implied volatility is too high relative to call-implied volatility, you would devise a long risk-reversal strategy by shorting the out-of-the-money put option and go long the out-of-the-money call option.

A和C选项纠结中,选择了C

1 个答案

pzqa31 · 2023年10月27日

嗨,从没放弃的小努力你好:


一般提到risk reversal指的是short risk reversal。

另外教材上没有区分long/short risk reversal,同时也没有对collar和risk reversal进行明确地区分。collar是在默认持有现货头寸的基础上-C +P,教材中对于collar和risk reversal的描述直接是-C+P。教材中的相关的表述如下:

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