Short Gut

Most retail traders shouldn't. It's primarily used by market makers with hedges or institutions with offsetting positions. For retail, defined-risk alternatives like iron condors are usually better.

Both options are ITM, meaning they have intrinsic value. At any price between strikes, you owe back the strike width (intrinsic). You only keep the extrinsic portion as profit. Example: Receive S$2.75, owe S$2.00 = S$0.75 max profit.

You must sell 1,000 shares at the call strike. If you don't own shares, you'll be short 1,000 shares. You'll need to buy shares to cover or manage the short stock position along with the remaining put.

Yes, margin is released when you close. However, if you're closing at a loss, you'll have less cash. Margin requirement can also increase if the position moves against you before closing.

Theoretically yes with unlimited risk, though brokers typically have margin calls and forced liquidation. Never trade this strategy without understanding you could lose your entire account plus owe more.

Since risk is unlimited, use stop-loss as your risk. If you'll close at 2× max profit loss (e.g., S$1,500 loss on S$750 max profit), that's your risk for sizing. At 1% portfolio risk, a S$150,000 portfolio = S$1,500 max loss = 1 contract.

Gamma peaks at ATM and decreases for ITM options. Since short gut uses ITM options, the gamma magnitude is lower. This means the position deteriorates slower as the stock moves, though losses are still unlimited.

Yes, strongly consider it. ITM calls are frequently assigned before ex-dividend so the holder can capture the dividend. Early assignment means unexpected short stock position.

Generally poor. You might need S$6,000+ margin for S$750 max profit (12.5% return on margin). Iron condor might need S$600 margin for S$400 max profit (67% return on margin). Iron condor is more capital efficient.

Roll if you can collect credit that offsets losses and you still believe in the thesis. Close if you can't roll for credit, thesis is invalidated, or loss exceeds your stop. Never throw good money after bad.

Put-call parity links ITM options to their OTM counterparts. Skew in OTM options affects ITM pricing through this relationship. Analyzing the vol surface helps determine if you're getting fair extrinsic value.

Start delta-neutral. As stock moves and delta develops, buy/sell stock to offset. If delta reaches +30, sell 30 shares per contract. This reduces directional exposure but adds transaction costs and doesn't eliminate gamma risk.

Yes. Buy an OTM call above the short put strike and an OTM put below the short call strike. This creates an iron butterfly with defined risk. You'll pay for the protection, reducing potential profit.

Short gut profits when realized vol < implied vol. If the stock moves less than implied volatility suggested, you profit from the vol risk premium. Analyze historical realized vol vs current implied to assess edge.

High IV percentile (>50%) means more extrinsic to collect. However, high IV often precedes movement, so timing is tricky. Ideally enter when IV is elevated but expected to decline (post-event, IV rank mean-reverting).