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Gamma Exposure Explained: GEX Market Structure Report — Apr 16, 2026

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# Gamma Exposure Explained: [GEX dashboard](https://voledge.io/dashboard/gex) Market Structure Report — Apr 16, 2026

**Meta description:** Gamma exposure explained through today's dealer positioning data. SPY pinned at 700 with 667B positive GEX, QQQ at 1012B. Key flip strikes, put walls, and trading levels inside.

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## Current GEX Regime: Dealer Positioning Today

**SPY** carries 667.3 billion in total gamma exposure. **QQQ** sits even higher at 1,012.9 billion. Both readings are deeply positive, placing the broad market firmly in a dealer-long-gamma regime — the kind of environment where market makers mechanically dampen directional moves by selling into rallies and buying into dips.

With today's session showing +2.83% average breadth across 37 advancers and only 12 decliners, the positive GEX environment is acting as a governor on what would otherwise be an aggressive risk-on tape. Dealers are absorbing momentum rather than amplifying it, which compresses realized volatility below what the headline moves might suggest.

## Key GEX Levels: Flip Strike, Gamma Walls, and Pin

The SPY max gamma strike and [GEX flip strike](/tools/gex-dashboard) converge at 700 — a rare alignment that turns this level into both the strongest magnet and the regime boundary. Above 700, dealer hedging dampens every tick. Below 700, positive gamma vs negative gamma dynamics shift, and dealers begin amplifying moves rather than absorbing them. That convergence makes 700 the single most important structural level in today's session.

The SPY put wall sits at 694 with -42.4 billion in net GEX — a meaningful pocket of dealer short gamma that would generate mechanical buying if price approaches from above. The call wall at 700 carries 612.4 billion in net GEX, creating a ceiling where dealer selling intensifies. The functional range defined by these gamma walls is 694–700, a tight 6-point band consistent with a compression regime.

QQQ's structure tells the same story at a larger scale. The flip strike at 635, max gamma at 637, and call wall at 637 concentrate dealer hedging activity in a narrow 2-point zone. The put wall sits further out at 626, where -20.0 billion in net GEX provides a lower bound. The distance between the put wall and the pin — 11 points — suggests QQQ has more room to drift lower before hitting structural support than SPY does.

## SPX Strike-Level Gamma Analysis

The SPY strike-level breakdown reveals extreme concentration at the 700 strike: 612.4 billion in net GEX with 724.6K in DEX, dwarfing every other level. The 701 strike holds 61.6 billion, the 697 strike 52.1 billion — meaningful but an order of magnitude below the 700 pin. The asymmetry is pronounced on the downside: the 694 strike flips to -35.5 billion net GEX, and 690 registers -7.4 billion. This creates a sharp cliff below 694 where dealer positioning shifts from supportive to reflexive. Any sustained move through 694 would transition SPY into a negative gamma pocket with potential for accelerated selling into the 690 level.

On the upside, gamma is evenly distributed across 701–705, with each strike carrying 14–20 billion in positive GEX. This creates a smooth, well-defended ceiling rather than a single breakout trigger — consistent with a mean-reverting environment above the pin.

## Single-Name GEX Setups

**TSLA** at $391.95 is trading between its flip strike at 360 and its call wall/max gamma at 400. With 39.4 billion in total GEX, the entire range from 380 (put wall) to 400 is positively gammed — dealers are dampening the +7.6% move today. The 400 strike holds 7.0 billion in net GEX and acts as the pin. On a day where TSLA gained nearly 8%, the gamma structure suggests the rally decelerates approaching 400 rather than breaking through cleanly.

**AAPL** at $266.43 sits just above its flip strike at 262.5, with max gamma and the call wall at 270. The [options flow tracker](/tools/options-flow) flagged the session's largest single print: $9.9 million in 262.5 calls expiring Apr 17, with volume running 2.8x open interest — a score-90 sweep indicating urgency. That strike is the flip level. Aggressive call buying at the flip strike reinforces the gamma structure above it and adds to dealer long-gamma positioning. The 270 call wall carries 16.7 billion in net GEX, defining the upside target.

**NVDA** shows a null flip strike with 106.4 billion in total GEX, suggesting universally positive dealer gamma across the chain. Max gamma at 200 and put wall at 195 frame the structural range. Notably, the [unusual flow](/tools/options-flow) captured selling of 180 puts ($99K premium, 4.4K volume) — a bet that NVDA remains well above the lower gamma boundary.

**PLTR** stands out as the one name where flow contradicts the bullish tape. Despite a +4.6% move to $142.15, the flow summary shows $5.2 million in total premium skewed bearish: put buys at the 138 and 139 strikes with 10–12x volume-to-OI ratios (score 90). Near-term protection at this scale in a name rallying with the broader market warrants attention — it may represent hedging against a concentrated long position or genuine directional conviction against the move.

## What GEX Means for Trading Today

The data paints a textbook positive-gamma compression regime. With SPY's flip strike, max gamma, and call wall all converging at 700, the session's center of gravity is clearly defined. Expect narrow ranges, failed breakouts, and mean-reversion toward the 700 pin — the kind of environment where premium sellers have a structural tailwind and breakout traders get chopped. The critical level to monitor is 694: a break below shifts the dealer hedging dynamic from dampening to amplifying, and the -35.5 billion net GEX pocket there marks the regime change boundary. As long as SPY holds above 694, the [market structure](/learn/market-mechanics) favors selling volatility with defined risk outside the 694–700 range.

## Related Reading

- [High IV Rank Stocks Today: Apr 16 Daily Volatility Brief](https://voledge.io/blog/high-iv-rank-stocks-today-apr-16-daily-volatility-brief) - [High IV Rank Stocks Today: NOW, RBLX, and MSFT Top a Bullish Tape](https://voledge.io/blog/high-iv-rank-stocks-today-now-rblx-and-msft-top-a-bullish-tape) - [High IV Rank Stocks Today: Tech Rips Into a Positive-Gamma Tape](https://voledge.io/blog/high-iv-rank-stocks-today-tech-rips-into-a-positive-gamma-tape)