Gamma Flip

Definition

A gamma flip describes a market phenomenon where the collective gamma exposure of options market makers or large institutional participants shifts from positive to negative, or vice-versa, often around key strike prices. This change in gamma sign dictates whether market makers will buy into strength and sell into weakness (positive gamma) or exacerbate price movements by selling into strength and buying into weakness (negative gamma). It represents a critical inflection point in market microstructure.