Gamma Scalping

No. Gamma scalping is complex, time-intensive, and has no guaranteed profit. Success requires: stock to oscillate more than implied volatility suggests, discipline to hedge consistently, capital for margin, and ability to monitor constantly. Transaction costs can easily eliminate edge.

Significant time during market hours. You need to monitor the position, calculate delta changes, and execute hedges. Some traders automate this, but even then it requires attention. Casual or part-time traders may find it difficult.

Your position accumulates directional delta. If the stock continues in that direction, you may profit (from delta). If it reverses, you lose the potential scalping profit. Missing hedges means missing the oscillation profits that are the core of the strategy.

Traditional gamma scalping uses stock for hedging. You could use futures or CFDs if available (often lower costs). Some traders use options for hedging, but this changes the Greeks. Stock is most straightforward.

You need capital for: (1) Option premium (straddle cost), (2) Margin for stock hedging (varies but significant), (3) Multiple transactions. For Singapore stocks like DBS, expect to need S$5,000-20,000+ depending on position size and broker requirements.

Track each hedge transaction. Calculate cumulative scalping P&L. Compare to cumulative theta decay. If scalping P&L > theta, you're succeeding. Track this daily and cumulatively. Also compare to option premium - are you on track to exceed it?

Either can work. Delta-based is more precise (hedge when delta hits ±X). Price-based is simpler (hedge every ±S$0.50 move). Delta-based adapts to gamma changes; price-based is more mechanical. Choose based on your style and monitoring capability.

Stamp duty (0.2% on purchases) is a significant drag. If you buy 300 shares at S$33 = S$9,900, you pay S$19.80 stamp duty. Over 20 buy transactions, that's ~S$400. This forces wider hedging bands than would be optimal otherwise.

IV drop hurts your long options (vega loss). Your scalping profits may not overcome both theta AND vega loss. This is why entering when IV is low is important - less room to drop. If IV drops significantly, assess whether to close early.

Generally roll before 21 DTE. After 21 DTE, theta accelerates faster than gamma benefit for most situations. Holding to expiration also creates pin risk (stock near strike causes extreme gamma). Rolling maintains favorable gamma/theta profile.

Market makers are natural gamma scalpers - they take the other side of customer orders and end up with inventory. They hedge continuously to remain delta-neutral, monetizing the bid-ask spread + any volatility risk premium. They have advantages: lower costs, faster execution, better pricing, and economies of scale.

Gamma scalping approximates a variance swap payoff. A variance swap pays (realized variance - implied variance). Continuous gamma scalping, in theory, replicates this: you earn realized variance through scalping and pay implied variance through theta. In practice, discrete hedging creates tracking error.

Optimal frequency balances: (1) Capturing variance (favors frequent hedging), (2) Transaction costs (favors infrequent hedging). The optimal band width is approximately √(2 × Transaction Cost / (Gamma × Price)). In Singapore with stamp duty, this pushes toward less frequent hedging than optimal in frictionless theory.

You can add directional bias by not fully hedging delta, or by using asymmetric hedge bands. However, this introduces directional risk. Some traders 'lean' in a direction but still scalp when moves occur. This is more complex and requires directional skill in addition to scalping discipline.

Backtesting requires: (1) High-frequency price data (at least 1-minute), (2) Accurate Greeks calculation at each point, (3) Realistic transaction cost modeling including spread and stamp duty, (4) Proper simulation of hedge execution. Standard daily data is insufficient. Results are highly sensitive to transaction cost assumptions.