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139****67842024-01-30 20:44:18

Generally speaking, implied volatility increases for put options at strike prices that are lower than the current stock price, whereas implied volatilities decrease for call options for strike prices that are higher than the current stock price; this is called the volatility skew. However, sometimes implied volatility decreases for put options at strike prices that are lower than the current stock price, whereas implied volatilities increase for call options at strike prices that are higher than the current stock price; this is called the volatility smile.

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Simon2024-01-31 15:19:13

同学,上午好。volatility smile和skew,行权价越低,越在图像左边,行权价越高,越在图像右边。

Generally speaking, implied volatility increases for put options at strike prices that are lower than the current stock price【行权价低于当前股价,所以是OTM put,在图像左边,volatility高,这段话描述正确】,
whereas implied volatilities decrease for call options for strike prices that are higher than the current stock price【行权价高于当前股价,所以是OTM call,在图像右边,volatility低,这段话描述正确】; 
this is called the volatility skew. 
However, sometimes implied volatility decreases for put options at strike prices that are lower than the current stock price, 【错,OTM put volatility低,正确说法在smilie中,左边图像volatiliy也是高的】
whereas implied volatilities increase for call options at strike prices that are higher than the current stock price; this is called the volatility smile. 【这段话对的,OTM call的volatiliy高】

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