Zomma

An options greek used to measure the change in gamma in relation to changes in the volatility of the underlying asset. Zomma, though considered a third level greek, is a first derivative of volatility, a second degree derivative of an underlying asset and third as it is related to the value of that underlying asset.

Options traders and risk managers most often use a measure of zomma to determine the effectiveness of a gamma hedged portfolio. Zomma's measure will be a measure against the change in volatility of the portfolio, or underlying assets of the portfolio.

Also known as DgammaDvol.