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

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SpotGamma Weekly

Apr 05 2026

How One Key Level Drove Last Week’s Rally

The S&P 500 bounced back 2% last week after scraping against 6-month lows. Mixed headlines on the Iran conflict explained much of this tug-of-war, yet markets are still holding their breath. For many traders, the rally felt counterintuitive: How can equities rally so furiously if geopolitical uncertainties remain unresolved? When looking at Tuesday’s major bounce in […]

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

Mar 29 2026

The New Volatility Regime

Over the past several weeks, we have consistently highlighted the market’s growing fragility. From the negative gamma “trapdoor” to the destabilizing impact of geopolitical shocks, the message has been clear: this is no longer a range-bound market. Last week confirmed those warnings, as the S&P 500 is down nearly 9% from all-time highs. On Thursday and Friday, traders […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer gamma, dealer positioning, geopolitical risk, implied vol, iv, negative gamma, realized vol, spotgamma weekly, SPX, Synthetic OI, VIX, volatility

Mar 22 2026

After OPEX: Market Loses Its Shock Absorber

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 15 2026

March OPEX: Tipping Point or Turning Point?

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

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

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

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

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

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?

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

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