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S&P 500 Stock Market Gamma Trading Levels Based on Options Open Interest

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volatility

Mar 22 2026

After OPEX: Market Loses Its Shock Absorber

Stacked bar charts showing March 20, 2026 OPEX delta notional breakdown by asset class, with calls vs puts distribution percentages.

The options market has just cleared one of the largest structural events of the quarter, as Friday’s OPEX saw nearly $1.4 trillion in delta notional expire for the S&P 500. Because significant positions have now rolled off from the March expiration, the market has lost an important stabilizing force just as macro pressures begin to build. […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer gamma, dealer positioning, FOMC, geopolitical risk, implied vol, iv, negative gamma, OPEX, put skew, realized vol, spotgamma weekly, SPX, trace, VIX, volatility, Volatility Skew

Mar 22 2026

VIX Expiration, Oil, and the JP Morgan Collar Trade: What’s Driving the S&P 500

Market Summary The market is entering a critical window where VIX expiration, quarterly options expiration, crude oil, and the JP Morgan collar trade are all colliding at once. The core argument is simple: implied volatility remains elevated while realized volatility has stayed unusually muted, and that mismatch may not last much longer. If oil continues […]

Written by SpotGamma · Categorized: Market Analysis · Tagged: Iran, JPM Collar, oil, OPEX, Stock Market Crash, VIX, volatility

Mar 15 2026

March OPEX: Tipping Point or Turning Point?

Two charts comparing SPX 1-month realized volatility against VIX implied volatility from 2000-2026, with their spread displayed below.

Fragility, Risk, and Potential Vol Reset As the S&P 500 enters OPEX week, we echo the same theme of the past few weeks: this market remains fragile. Last week’s selloff pushed the index below the three-month trading range of SPX 6,800-7,000 that had held since late 2025, subsequently closing down 5% since mid-January. The conflict with Iran continues […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer gamma, dealer positioning, FOMC, geopolitical risk, implied vol, iv, negative gamma, put skew, realized vol, spotgamma weekly, SPX, trace, VIX, volatility, Volatility Skew

Mar 08 2026

Geopolitical Risk Hits a Fragile Market

SPX gamma exposure heatmap by strike price showing negative gamma conditions on March 6, 2026.

Markets entered last week on fragile footing. In our previous Sunday note, we emphasized how negative dealer gamma, extreme put skew, and heavy 0DTE options activity set the market up for a trapdoor scenario. This created a market structure vulnerable to sharp drops and spikes in volatility, as we saw play out last week. The dramatic […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: Compass, dealer gamma, dealer positioning, forward implied volatility, forward-vol, geopolitical risk, iv, negative gamma, put skew, risk management, spotgamma weekly, SPX, Synthetic OI, trace, volatility, Volatility Skew

Mar 01 2026

The Options Market Trapdoor

SPX options chart showing implied volatility curve with strike prices, highlighting two price levels marked by yellow dashed lines and arrows.

Over the past week, the topic of volatility has returned to the forefront. While the market has been largely range-bound, underlying support remains tenuous. Simultaneously, traders have begun more actively paying for downside protection. Given the backdrop of flaring geopolitical conflict, we see assymetric downside risk forming as trader uncertainty and negative gamma threaten to unlock the […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: call skew, Compass, dealer gamma, dealer positioning, iv, negative gamma, positive gamma, put skew, spotgamma weekly, SPX, Synthetic OI, volatility, Volatility Skew

Feb 22 2026

Right Tail Risk Is Building in the S&P 500

S&P 500 options gamma chart showing left and right tail risk zones with strike prices and gamma levels.

The market spent most of last week locked in the SPX 6,800–6,900 range that has largely held since Thanksgiving. Wednesday’s VIX expiration and Friday’s monthly OPEX defined the week’s rhythm, while negative gamma positioning and elevated single-stock put demand maintained pressure under the surface. Our historical OPEX data suggests the market is positioned for a […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: Compass, dealer gamma, dealer positioning, iv, mag7, negative gamma, OPEX, positive gamma, spotgamma weekly, SPX, Synthetic OI, volatility

Feb 15 2026

Flat Index Masks Hidden Chaos

SPX put skew chart showing elevated downside hedging with call skew at low levels as of February 13, 2026.

Overall price stability in the S&P 500 is masking one of the most unusual equity environments in recent years. While SPX has been roughly flat over the past month, the average constituent has moved 10.8% — a 99th percentile dispersion reading, as we discussed in our Thursday AM Founder’s Note. All signs point to increasing fragmentation beneath […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: FOMC, iv, OPEX, positive gamma, spotgamma weekly, SPX, VIX, volatility

Feb 08 2026

The Market’s 0DTE Underbelly Is Exposed

SPX options data showing strike prices, net open interest, and gamma exposure throughout trading hours on Feb 4, 2026.

Last week reminded us just how fast market stability can give way to volatility. After trading near all-time highs at 7,000, the S&P 500 fell 3% in just three sessions, closing Thursday at 6,798 amid weakness in software and crypto. Our last Sunday Newsletter focused specifically on how this type of fragility underscores today’s market. This […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: FOMC, iv, OPEX, positive gamma, spotgamma weekly, SPX, VIX, volatility

Feb 01 2026

SPX Touches 7,000 and Cracks — What Makes This Market So Fragile?

Chart showing cumulative dealer gamma (positive) and non-Odte dealer gamma (negative) across strike prices, with bars indicating gamma levels.

Market Fragility in the Face of All-Time Highs As the S&P 500 pushes record highs, the options market continues to flash warning signals beneath the surface. Underlying risk from volatility discrepancies and index-equity correlation suggest an environment prone to vol spasms — similar to what we witnessed with Thursday’s (1/29) sharp selloff and reversal. These […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: FOMC, iv, OPEX, positive gamma, spotgamma weekly, SPX, VIX, volatility

Jan 25 2026

Vanna Fuels Market Rally as Market Fears Subside

Volatility skew chart showing downside vol decreasing from Tuesday to Friday while upside vol spikes, with three comparable trading dates tracked.

Last week began with fear dominating market sentiment: analysts widely attributed Tuesday’s 2% SPX selloff to Greenland worries and tariff threats. As we pointed out in last weekend’s newsletter, traders had begun hedging against downside risk as put skew increased and volatility premiums rose. However, the quick turnaround back to SPX 6,900 seemed to erase any […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: FOMC, iv, OPEX, positive gamma, spotgamma weekly, SPX, VIX, volatility

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