Gamma Flip

What Is the Gamma Flip?

The gamma flip is the price level where aggregate dealer gamma exposure crosses zero, transitioning from positive to negative or vice versa. It marks the boundary between two distinct volatility regimes.

Above the flip, dealers are typically net short gamma. Their delta-hedging is counter-directional: they sell as price rises and buy as price falls, suppressing volatility. Below the flip, dealers become net long gamma. Their hedging moves with the price, amplifying rather than dampening moves.

The flip level shifts constantly. New trades, expiring contracts, and price moves alter the distribution of open interest across strikes, changing where the zero-crossing sits. Quantitative firms publish estimated flip levels as dynamic signals, not static reference points.

Why It Matters for Options Traders

The gamma flip predicts volatility regime shifts. Crossing it often marks the transition from low-volatility grinding to explosive moves.

Above the flip, price tends to be sticky. Dips get bought by both investors and dealers mechanically re-hedging. Below the flip, this stabilizing flow reverses. Dealers who were buying dips now sell as price falls, accelerating the decline. The structural support vanishes exactly when selling pressure peaks.

Traders use the gamma flip to inform strategy selection. Above the flip, selling premium and volatility strategies tend to perform better. Below it, long volatility exposure and directional strategies aligned with the trend often outperform.

Key Characteristics

• Zero-crossing of net gamma: The gamma flip is where aggregate dealer gamma changes sign from positive to negative or vice versa
• Dynamic level: The flip price shifts continuously as options are bought, sold, and expired — it is not a fixed support or resistance level
• Regime boundary: Crossing the gamma flip marks a transition between dealer-stabilized and dealer-amplified volatility conditions
• Asymmetric impact: The flip tends to matter most when price breaks downward through it, because dealer selling can accelerate declines
• Related to gamma walls: Gamma walls mark concentrations of gamma at individual strikes; the flip level marks the aggregate zero-crossing across all strikes
• Index relevance: The gamma flip concept is most commonly applied to SPX and SPY, where dealer positioning is massive enough to affect realized volatility