Record dealer gamma exposes market to sudden crash if momentum breaks

Dealer gammaThe rate of change of delta - the option's curvature., a technical measure of market makers' hedging flows, has jumped to near-record levels, according to Goldman Sachs analysis. Gamma represents the rate of change in deltaHow much an option's price changes per $1 move in the underlying., the sensitivity of option hedges to underlying price moves. When gamma is high and negative (short-gamma), dealers are forced to sell into strength and buy into weakness, exacerbating volatility and amplifying directional moves in both directions.

The current setup presents a latent crash risk: if equity momentumThe empirical fact that winners keep winning over the medium term. falters and the S&P 500 breaks key support levels, dealers' forced buying to rebalance short-gammaThe rate of change of delta - the option's curvature. positions could rapidly reverse into forced selling, creating a feedback loop of accelerating drawdowns. Historical precedent includes the December 2018 Christmas Eve selloff and the COVID March 2020 crash, where dealer hedging dynamics amplified initial price moves into severe dislocations.

However, dealer gammaThe rate of change of delta - the option's curvature. spikes are a common feature of bull markets, especially when retail flow is heavy and volatility is suppressed. The S&P 500 call skew has hit record highs while put skew has collapsed, indicating that traders are heavily positioned for continued upside with minimal hedging. This suggests that as long as momentumThe empirical fact that winners keep winning over the medium term. holds and earnings growth supports valuations, the high gamma environment may not be immediately dangerous.

The risk materializes if a catalyst (e.g., Iran war escalation, Fed hawkishness, earnings disappointment) breaks the momentumThe empirical fact that winners keep winning over the medium term. trade. VIXThe 30-day implied volatility of S&P 500 options. The 'fear gauge.' has remained suppressed, suggesting complacency about tail risk. If volatility spikes suddenly, option gammaThe rate of change of delta - the option's curvature. effects could amplify that move, creating a sharp correction or worse before market makers can fully adjust positioning.