S&P 500 sell-off puts options market focus on key risk pivot

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S&P 500 options risk pivot

Highlights

Options market makers have maintained long gamma around the S&P 500 7,500 level, stabilizing prices within a 200-point range since mid-May.
Barchart flags a negative gamma flip at 7,500 in S&P 500, raising risk of intensified volatility and less robust dip-buying if the index drops further.
SpotGamma notes positive gamma is minimal below 7,300, with bearish sentiment rising as the S&P 500 breaches a risk pivot, prompting put-based hedges.

Dealer positioning shapes near-term trading range

As reported by CNBC, options traders are watching whether concentrated positioning around key S&P 500 levels continues to act as a stabilizer for the market. Analysis based on data from SpotGamma, Barchart and Cboe LiveVol suggests market makers are likely long gamma for much of the past month, a setup that tends to damp volatility because dealers buy stocks on dips and sell into rallies.

The largest positions are concentrated around the 7,500 level in the S&P 500, creating what traders describe as support and resistance zones. This is seen as a main reason the benchmark largely stays within a 200-point range since mid-May, even as macro conditions become less favorable.

That buffer is not absolute. If the index moves too far from dealers’ preferred range, positive gamma can turn negative, forcing market makers to hedge in ways that amplify price swings instead of suppressing them.

Risk of deeper volatility builds below key levels

According to Barchart’s volatility model, the flip into negative gamma occurs at 7,500, a level that may weaken expectations for steady dip-buying. Traders are also monitoring the State Street SPDR S&P 500 ETF Trust, where a move below 740, the area of largest dealer gamma exposure, could raise the risk of a sharper sell-off.

“We are in a negative gamma regime,” Brendan Herbert, options product manager at Barchart, says. He adds that if the market falls further, market makers may have to sell to cover deltas, potentially intensifying any downward move.

Brent Kochuba, founder of SpotGamma, writes in a note to clients on Thursday morning that positive gamma in the market has diminished but remains fairly light down to the 7,300 level. He adds that the S&P 500 has moved below a risk pivot and says he would add short-dated, cheap, out-of-the-money put flies with a bearish directional bias.

Our earlier article on the S&P 500’s corrective pullback highlighted how the index slipped below its 20- and 50-day moving averages, signaling persistent seller control despite strong earnings-guidance momentum. It also flagged the 7,322–7,393 area as a key near-term support/resistance zone, warning that a break below support could confirm deeper short-term weakness amid sector-driven volatility.

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