Gamma Flip
The estimated underlying-asset level at which the net gamma position of options dealers flips from positive to negative (or vice versa). Below the flip line, dealers are typically net short gamma and their hedging amplifies moves; above the flip line, dealers are typically net long gamma and their hedging dampens moves. The line is ESTIMATED from public open-interest data with assumptions about dealer-vs-non-dealer positioning, so different vendors publish different lines -- estimates of the same flip can differ by 50-200 index points. A useful microstructure concept with material calibration uncertainty.
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Related terms
American Option · Asian Option · Barrier Option · Basket Option · Butterfly Spread · Calendar Spread
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