Long Gut

Volatility Strategies Advanced Singapore STI DBS OCBC UOB SINGTEL

Expecting Significant Move in Either Direction

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Quick Reference

Strategy Type Long Volatility Using ITM Options
Market Outlook Expecting Significant Move in Either Direction
Risk Profile Defined Risk - Premium Paid Minus Intrinsic Overlap
Reward Profile Unlimited Profit Potential Both Directions
Time Horizon 30-60 Days Typical
Iv Environment Low IV Preferred (Lower Extrinsic Value)
Breakeven Two Breakevens - Outside the Strike Range

Payoff Profile

A long gut creates a V-shaped payoff similar to a straddle, but the strikes are further apart (ITM call below stock, ITM put above stock). The profit zone begins outside the strike range. • Unlimited as stock rises above call strike • Substantial as stock falls below put strike • Total Premium - Intrinsic Value Overlap • Call Strike + Total Premium - Put Intrinsic • Put Strike - Total Premium + Call Intrinsic

Singapore Market Details

Primary Instruments STI Options, DBS, OCBC, UOB - need ITM strikes with liquidity
Mas Compliance MAS regulated; No margin required (all long options)
Contract Size 1,000 shares for equities; S$5 per point for STI
Trading Hours 9:00 AM - 5:00 PM SGT
Strike Intervals S$0.50 for equities; 10-25 points for STI
Expiration Schedule Monthly options - 2nd last business day of month
Settlement T+1 for derivatives
Tax Treatment No capital gains tax for individuals in Singapore
Liquidity Note ITM options may have wider spreads than ATM; Check liquidity before entry

Frequently Asked Questions

Why is it called a 'gut'?

The name comes from the strikes being 'inside' (like intestines) the current stock price. The call strike is below and the put strike is above, bracketing the stock from the inside. This is opposite to a strangle where strikes are outside.

Why does a gut cost more than a straddle?

A gut includes intrinsic value in both options. While a S$33 straddle might cost S$1.05 (all extrinsic), a S$32/S$34 gut might cost S$2.85 (S$2.00 intrinsic + S$0.85 extrinsic). You're paying for the guaranteed floor value.

Can I lose the entire premium on a gut?

No, not the entire premium. The strike width (e.g., S$2 for S$32/S$34 strikes) is guaranteed at any expiration price. You can only lose the extrinsic portion (premium minus strike width).

When should I use a gut instead of a straddle?

Use a gut when: you want lower daily theta decay, you have more capital to deploy, you plan to hold through multi-day events, or you want a guaranteed floor value. Use straddle for maximum gamma with less capital.

Are the breakevens the same as a straddle?

No. Gut breakevens are further from current price (outside the strike range). You need a bigger move to profit, but you also have less at risk. It's a trade-off: higher capital, lower risk, bigger move needed.

How do I calculate my true risk on a gut?

True risk = Total Premium - Strike Width. For a S$32/S$34 gut costing S$2.85: Risk = S$2.85 - S$2.00 = S$0.85. The S$2.00 is guaranteed regardless of outcome.

Why is liquidity a concern for guts?

ITM options typically have wider bid-ask spreads than ATM options. This slippage can reduce or eliminate the theta advantage. Always check ITM strike liquidity before entering a gut.

How does gamma compare to a straddle?

Gut has lower gamma because ITM options have less gamma than ATM. Your position gains from movement, but less explosively. The trade-off is lower theta decay.

Should I size based on total premium or effective risk?

Size based on effective risk (premium - strike width). If your risk budget is S$1,000 and effective risk is S$850 per gut, you can do 1 gut even though total capital is S$2,850.

How does IV crush affect guts vs straddles?

Guts are less affected by IV crush because they have less extrinsic value (lower vega). After events, gut positions lose less value from IV collapse than straddles would.

How does put-call parity affect gut pricing?

Put-call parity means ITM calls are linked to OTM puts and vice versa. Skew in the OTM options affects ITM pricing through this relationship. Sometimes gut extrinsic can be cheaper than straddle due to skew effects.

What is the synthetic equivalent of a gut?

Long gut = Long straddle + Long box spread. The box value equals the strike width. This shows why gut and straddle have the same extrinsic exposure - the difference is just the box (guaranteed value).

How do I gamma scalp a gut position?

Same as straddle: delta hedge with stock as position moves, then rebalance. However, lower gamma means less scalping opportunity. May not be worthwhile for small guts due to transaction costs.

When is the gamma/theta ratio better for gut vs straddle?

The ratio may be similar despite different absolute values. Calculate: Gamma ÷ Theta for each. If gut ratio is similar or better with lower absolute theta, gut offers better risk-adjusted exposure.

How do I integrate guts into a short-vol portfolio?

Guts add long gamma to offset short gamma from iron condors. The lower theta of guts means less drag on portfolio. Size guts based on effective risk to balance with short-vol positions.

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