Gamma Scalping

What is Gamma Scalping?

Gamma Scalping Gamma scalping is an advanced options strategy that profits from realized volatility being higher than implied volatility. The trader establishes a long gamma position (typically long an ATM straddle), then dynamically delta-hedges by buying and selling the underlying stock as it moves. Profits come from the back-and-forth movement of the underlying — the more the stock oscillates, the more profit from gamma. The mechanics: a long straddle has positive gamma, meaning its delta changes as the underlying moves. After a rally, delta becomes positive (call dominates); the trader sells stock to re-establish delta neutrality. After a sell-off, delta becomes negative (put dominates); the trader buys stock to re-neutralize. Each round-trip captures a small profit because the gamma "convexity" means you're systematically selling high and buying low. The economics: - **Profit driver**: realized volatility minus implied volatility (RV − IV). If the stock realizes more vol than the options imply, the gamma scalping profits exceed the theta cost. - **Cost driver**: theta decay on the long straddle. The trader pays time decay daily; gamma scalping must produce enough profit to cover it. - **Break-even**: realized vol = implied vol. Above that, scalping is profitable; below, it loses to theta. Professional gamma scalpers typically: - Use 30-60 DTE long straddles (sufficient gamma without crushing theta). - Delta-hedge multiple times per day (more aggressive in high-vol regimes, less in calm). - Watch the RV vs IV spread carefully — exit when implied vol becomes too cheap to justify the position cost. - Size based on portfolio gamma rather than premium spent. Gamma scalping is the institutional flip side of premium selling. While iron condor sellers profit when realized vol underperforms implied (the typical regime), gamma scalpers profit when realized vol overperforms — typically around earnings clusters, major macro events, or in unusually choppy intraday environments. A common retail variant: buy a long straddle into earnings, scalp gamma as the stock makes a directional move (delta-hedge once or twice during the move), close the position before IV crush. This is more of a directional bet with a gamma overlay than true continuous gamma scalping. Modern gamma scalping has been disrupted by 0DTE options. Daily expirations let traders compress what was a multi-week gamma-scalping trade into a single session, with much higher gamma per dollar of position. Professional desks now run gamma-scalping books across multiple DTE buckets, harvesting different parts of the realized-vs-implied spectrum.