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

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October OPEX

Oct 25 2026

Dip Buyers Step into the AI Unwind

Will the Selloff Continue? The market began to waver at the end of last week, with the S&P 500 down nearly 2% and Nasdaq dropping 3% from mid-week highs. We noted a spike in MAGS put buying and a rising put/call ratio in our previous Sunday Newsletter as big tech earnings approached. Then, our October […]

Written by Sherry An · Categorized: Market Analysis, SpotGamma Weekly · Tagged: AI trade unwind, CRWV call option, dealer gamma, DRAM call option, FOMC, implied volatility, NBIS calls, October OPEX, options positioning, options skew, SKHY calls, spotgamma weekly, SPX term structure, stock market selloff, volatility spike

Oct 18 2026

OPEX Week Shatters Market Calm

Vol Sellers Forced to Cover as VIX Breaks 20 On Friday, the market’s calm broke heading into the October monthly options expiration. The S&P 500 dropped over 1% on the day while the VIX jumped to close at 20 — the highest level in nearly three months. Options traders spent Friday scrambling for protection, marking […]

Written by Sherry An · Categorized: Market Analysis, SpotGamma Weekly · Tagged: dealer gamma, implied volatility, MAGS puts, October OPEX, options positioning, options skew, put/call ratio, QQQ puts, spotgamma weekly, SPX put skew, VIX calls, volatility spike, VVIX

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