What is Gamma Exposure (GEX)?
Gamma Exposure, commonly abbreviated as GEX, measures the total gamma-weighted open interest across all option contracts at each strike price. It reveals how much delta hedging market makers and dealers must perform as the underlying stock price moves. The standard formula is: GEX = Gamma × Open Interest × 100 × Spot Price². By aggregating GEX across all strikes, traders can identify key price levels where dealer hedging activity will either stabilize or amplify price movements.
For example, if a stock trades at $450 and there are 50,000 call contracts at the $450 strike with a gamma of 0.045, the call GEX at that strike would be 0.045 × 50,000 × 100 × 450² = approximately $45.6 billion. This massive notional value shows why options market makers have such a significant impact on stock price behavior through their hedging activities.
Why Use Our GEX Chart?
Visual GEX by Strike
See a clear bar chart of net gamma exposure at every strike price. Positive bars (green) indicate dealer long gamma; negative bars (red) indicate dealer short gamma. Instantly spot where the action is concentrated.
Gamma Wall Detection
Automatically identifies the gamma wall — the strike with the highest positive GEX concentration. This level acts as a price magnet where dealer hedging creates strong mean-reversion pressure.
Zero Gamma Level
Pinpoints the exact price where net dealer gamma flips from positive to negative. Above this level, dealers suppress volatility; below it, they amplify moves. A critical level for understanding market regime shifts.
Real-Time Options Data
GEX is calculated from live option chain snapshots with real gamma values and open interest. No manual data entry required — just enter a ticker and get instant results.
How to Use This GEX Chart
- 1
Enter a Ticker Symbol
Type a U.S. stock or ETF ticker symbol (e.g., SPY, AAPL, TSLA, QQQ) into the input field. The tool works with any optionable security.
- 2
Load GEX Data
Click "Analyze GEX" to fetch the full option chain snapshot. The tool retrieves gamma and open interest for all contracts, then calculates GEX at each strike price.
- 3
Interpret the Chart
Review the bar chart showing net GEX by strike. Green bars indicate positive gamma (stabilizing), red bars indicate negative gamma (amplifying). The dashed blue line marks the current stock price. Look for the gamma wall, put wall, and zero gamma level.
Positive vs. Negative Gamma: Market Impact
The sign of net gamma exposure determines how dealer hedging affects market behavior. Positive gamma means dealers are net long gamma — they buy when the stock falls and sell when it rises. This dampens volatility and creates a "pinning" effect near high-GEX strikes, especially around options expiration.
Negative gamma means dealers are net short gamma — they must sell into declines and buy into rallies to maintain delta neutrality. This amplifies price movements and can lead to gamma squeezes, where forced hedging creates a feedback loop of accelerating price moves.
Positive GEX Environment
Dealers buy dips and sell rallies. Expect lower volatility, mean-reversion, and price pinning near the gamma wall. Ideal for range-bound strategies like iron condors and credit spreads.
Negative GEX Environment
Dealers sell into weakness and buy into strength. Expect higher volatility, trend continuation, and potential gamma squeezes. Directional strategies and long volatility plays tend to perform better.