SPDR S&P MIDCAP 400 ETF TRUST (MDY) Gamma Exposure
Net dealer gamma exposure in SPDR S&P MIDCAP 400 ETF TRUST (MDY) options is -$1.14B — dealers are net short gamma. Gamma exposure (GEX) estimates how much market makers must re-hedge as MDY moves. This page maps that exposure strike by strike, marks the gamma flip level, and explains what the hedging pressure means for price behavior in plain English.
Data as of Jul 10, 2026, 8:00 PM ET · OPRA data 15 minutes delayed · For information only — not investment advice.
MDY Gamma Exposure by Strike
MDY call GEX (green, above) and put GEX (red, below) by strike, with the cumulative net GEX line (blue). The line crosses zero at the gamma flip level — where net dealer positioning switches from stabilising to amplifying.
| Net gamma exposure (GEX) | -$1.14B |
| Gamma flip level | $330 |
| Net delta exposure | 129.43K |
| Total call open interest | 8,568 |
| Total put open interest | 16,696 |
Net dealer gamma exposure is -$1.14B. When dealers are short gamma they buy into rallies and sell into declines to stay hedged, which can amplify price swings. The gamma flip level — where cumulative dealer gamma crosses zero — sits at $330, 52.2% below the last close; crossing it would flip the hedging regime. The single largest gamma concentration sits at the $690 strike, which often acts as a magnet or barrier while dealers hedge around it.
MDY Net GEX History
MDY net dealer gamma exposure, past year.
Net dealer gamma exposure has fallen from $37.6M in Feb '26 to -$1.1B today.
Explore the payoff profile of option on MDY for free
Build multi-leg MDY strategies, visualize payoffs, and scan the full US options universe with OptiView.
MDY Options FAQ
What is MDY's gamma exposure (GEX) today?
MDY's net dealer gamma exposure is -$1.14B as of Jul 10, 2026. Negative GEX means dealer hedging trades with the market — buying rallies and selling declines — which can amplify swings.
What is MDY's gamma flip level?
MDY's gamma flip level is $330 as of Jul 10, 2026. It is the price where cumulative dealer gamma crosses zero: above it dealers are net long gamma (stabilizing hedging), below it they are net short gamma (destabilizing hedging).
How is MDY gamma exposure calculated?
OptiView multiplies each open MDY contract's gamma by its open interest, contract size, and the square of the share price, counting calls as positive and puts as negative dealer exposure. Summing across all strikes and expirations gives net GEX; the per-strike breakdown is shown in the chart above.
Methodology. IV rank compares the current 30-day at-the-money implied volatility with its highest and lowest values over the past 52 weeks. Max pain is the strike that minimizes the total payout to option holders at expiration. The call and put walls are the strikes carrying the largest call and put open interest across all expirations. Net gamma exposure (GEX) is measured from the dealer perspective. All statistics are derived from delayed OPRA options data.
Options trading involves significant risk, and losses can exceed your initial investment. Always consult a licensed financial professional before making investment decisions. OptiView does not provide financial advice; all figures on this page are descriptive statistics, not recommendations.