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

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OPEX

Jun 21 2026

Vol Sellers Shrug off a Hawkish Fed

Despite a hawkish Fed rattling equities midweek, the market easily and quickly retraced any lost ground by Thursday. With June OPEX now behind us and implied volatility reset toward recent lows, there is a soft feeling of “what’s next?” for the S&P 500 until earnings season ramps up next month. The June FOMC meeting on […]

Written by Sherry An · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer hedging, FOMC, Gamma Exposure, hawkish Fed, implied volatility, JPM Collar roll, Kevin Warsh Fed, market makers, Micron earnings implied move, negative gamma, OPEX, SPCX options, spotgamma weekly, SPX term structure

Jun 14 2026

Triple Witching + FOMC Fuels Volatility Risk

The market delivered several volatile sessions last week as traders navigated Wednesday’s CPI inflation report, Friday’s massive SpaceX IPO (SPCX), and a mix of Iran-driven headlines throughout. Last Sunday, we wrote about how extreme options positioning into major catalysts could spark the exact volatile market behavior observed over the past several days. Tuesday’s wild 200-point […]

Written by Sherry An · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer hedging, FOMC, Gamma Exposure, gold GLD outlook, implied volatility, Kevin Warsh Fed, market makers, negative gamma, OPEX, spotgamma weekly, SPX term structure, triple witching

Apr 19 2026

The Hidden Mechanics Behind Last Week’s Rally

The S&P 500 has bounced back to record highs, closing decisively above 7,100 after Friday’s 1.2% rally. That marks a 12% rise from March lows in just under three weeks. In that same timeframe, volatility expectations have seemingly collapsed: VIX is down 40% since March 31, dropping from >30 to below 18. Crude oil has […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: call buying, call options, dealer gamma, dealer positioning, geopolitical risk, implied vol, iv, OPEX, rv, spotgamma weekly, SPX, volatility

Apr 12 2026

Vol Crush Lifts the S&P 500 — Will the Rally Last?

Following last week’s ceasefire announcement, the S&P 500 lifted 3% from roughly 6,550 to 6,800. On the surface, this rally looked like a meaningful shift toward risk-on sentiment as implied volatility collapsed rapidly across all expirations. Similarly, VIX plummeted below 20 for the first time in four weeks, marking one of its largest single-day declines ever. Yet […]

Written by Simon Scholten · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer gamma, dealer positioning, geopolitical risk, implied vol, iv, negative gamma, OPEX, spotgamma weekly, SPX, vanna, vol crush, volatility

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 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 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

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

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