Zero-Gamma / Gamma Flip Level
The zero-gamma or gamma flip level is the estimated underlying price at which the dealer complex's net gamma switches sign. Above it, dealers are often net long gamma (volatility-dampening); below it, net short gamma (volatility-amplifying). It marks the boundary between the two regimes.
Because dealer gamma is a function of price, there is usually a level where the aggregate position crosses from positive to negative. Sitting above that flip, the market tends to be pinned and quiet; slipping below it, the same market can turn fast and trend, because dealer hedging flips from stabilising to amplifying.
Traders watch the flip as a structural line in the sand rather than a precise trigger. When price is comfortably above it, intraday ranges compress; when price breaks below and holds, realised volatility tends to expand. The flip itself moves as positioning and expirations change.
Like all dealer-positioning estimates, the flip level is an inference, not a guaranteed threshold. It is a probabilistic read of where the regime is likely to change, useful for context rather than as a mechanical signal.
Frequently asked
Does the market always reverse at the gamma flip?
No. The flip is an estimated boundary between regimes, not a support/resistance line. Price can cross it; what tends to change is the character of volatility, not the direction.
Does the flip level move?
Yes. It shifts as new options positions are opened and closed and as contracts expire, so it is re-estimated continuously rather than fixed.
Related terms
This term is part of a bigger picture: Gamma Exposure, Explained — the complete guide →