A measure that captures the premium difference between the value of an option calculated using the smile volatility and its value derived using the at-the-money volatility (ATM volatility). It is approximately equal to vega times smile volatility less ATM volatility difference. If smile volatility is larger than ATM volatility, zeta will have a positive value. The opposite is true (if smile volatility is smaller than ATM volatility, zeta will have a negative value).
Derivatives
Derivatives have increasingly become very important tools in finance over the last three decades. Many different types of derivatives are now traded actively on ...
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