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What Is the Gamma of a Deep ITM Option?

The Gamma of a deep In-the-Money (ITM) option is very close to zero. Gamma measures the rate of change of Delta.

Since a deep ITM option's Delta is already near its maximum of 1.0 (or -1.0) and changes very little with small movements in the underlying price, its Gamma is low. This means the Delta-hedge for a deep ITM option is very stable and requires minimal re-adjustment.

What Is the Term for an Option with a Delta Very Close to 1.0 or -1.0?
Why Do Options Deep OTM/ITM Have Low Gamma Regardless of Implied Volatility?
Does a Deep ITM Option Also Have Gamma near Zero?
How Does Delta Change as an OTM Call Option Moves Deeper OTM?