What is gamma scalping, and how does a trader profit from it while maintaining delta neutrality?

Gamma scalping is a volatility trading strategy where you buy options (acquiring positive gamma) and dynamically hedge delta to profit from realized volatility exceeding implied volatility. The key insight is that positive gamma generates profits from large price moves regardless of direction.\n\nCore Mechanics:\n\n`mermaid\ngraph LR\n A[\"Buy Straddle
(+Gamma, +Vega)\"] --> B[\"Delta Neutral
at inception\"]\n B --> C{\"Stock Moves\"}\n C -->|\"Stock rises\"| D[\"Delta turns positive
Sell shares to re-hedge\"]\n C -->|\"Stock falls\"| E[\"Delta turns negative
Buy shares to re-hedge\"]\n D --> F[\"Locked in profit
from rebalance\"]\n E --> F\n F --> G{\"Net P&L\"}\n G -->|\"Gamma gains > Theta decay\"| H[\"Profitable\"]\n G -->|\"Gamma gains < Theta decay\"| I[\"Loss\"]\n`\n\nStep-by-Step Example:\n\nTrader Kenji buys a 30-day ATM straddle on Ridgemont Technologies at $52. The call costs $2.10 and the put costs $1.95 (total premium: $4.05). Combined delta is approximately zero.\n\nDay 1: Stock jumps to $54. The combined position now has delta = +0.38. Kenji sells 38 shares at $54 to re-hedge.\n\nDay 2: Stock drops back to $52. Delta returns near zero. Kenji buys back 38 shares at $52.\n\nProfit from rebalance: 38 x ($54 - $52) = $76\n\nDay 3: Stock drops to $49. Delta = -0.45. Kenji buys 45 shares at $49.\n\nDay 4: Stock recovers to $52. Kenji sells 45 shares at $52.\n\nProfit from rebalance: 45 x ($52 - $49) = $135\n\nCumulative scalping profit: $76 + $135 = $211\n\nMeanwhile, theta decay over 4 days might cost approximately $0.54/day x 4 = $2.16 total (or $216 on 100-share contracts).\n\nNet P&L: $211 - $216 = -$5 (roughly breakeven in this scenario).\n\nWhen It Works:\n\nGamma scalping is profitable when realized volatility exceeds implied volatility. You're essentially buying implied vol (paying theta) and selling realized vol (earning gamma scalps). If the stock whipsaws more aggressively than the options market priced in, the cumulative rebalancing profits exceed theta decay.\n\nKey Risk: In calm markets, theta bleeds away the premium while gamma provides insufficient rebalancing opportunities. The strategy loses money in low-vol environments.\n\nExplore volatility strategies in depth with our CFA Derivatives course.