Iron Butterfly
A short straddle protected with wings for maximum concentrated neutral income.
Profit / Loss Diagram
Iron Butterfly at expiration
What is this strategy?
The Iron Butterfly is an advanced neutral strategy that sells a straddle — a put and a call at the same centre strike — protected by wings: a lower put and a higher call bought for coverage. It resembles an iron condor but more concentrated: the maximum-profit zone is very narrow, achieved only if price expires exactly at the centre strike, but the net credit is larger because you sell at-the-money options carrying the most extrinsic value in the chain.
The structure creates a butterfly-shaped payoff: maximum gain at the peak (centre strike), falling to zero at the breakevens, and then capped losses beyond. The Iron Butterfly suits traders confident that price will remain at or very near the current level. It requires moderate margin and offers a theoretically superior risk-reward to the iron condor thanks to the larger credit.
The Iron Butterfly is more aggressive than the iron condor because the maximum-profit zone is smaller. That said, the potential gain-to-loss ratio is better thanks to higher net credits. It works best when implied volatility is elevated and price is expected to be very stable. Management is critical: small moves can require adjustments quickly.
Construction
| Action | Instrument | Strike | Expiration | Example |
|---|---|---|---|---|
| SELL | 1 Put (ATM) | ATM | 30-45 DTE | -1 XLV 100 Put |
| SELL | 1 Call (ATM) | ATM (same strike) | Same expiry | -1 XLV 100 Call |
| BUY | 1 Put (OTM) | Lower OTM | Same expiry | +1 XLV 95 Put |
| BUY | 1 Call (OTM) | Higher OTM | Same expiry | +1 XLV 105 Call |
Example
Scenario: XLV at $100, strongly neutral view, you expect it to stay around $100 ± $5. Moderate margin available.
- Put Sold (100) -1 XLV 100 Put @ $3.00
- Call Sold (100) -1 XLV 100 Call @ $3.00
- Put Bought (95) +1 XLV 95 Put @ $1.00
- Call Bought (105) +1 XLV 105 Call @ $1.00
- Net Credit +$400 (3.00+3.00−1.00−1.00 × 100)
- Maximum Gain $400 (ONLY if XLV = 100 at expiry)
- Maximum Loss $100 (5-wide − 4 credit × 100)
- Breakeven (Put side) $96.00 (100 − 4)
- Breakeven (Call side) $104.00 (100 + 4)
The Greeks
The short put and short call deltas cancel perfectly. Completely neutral price exposure while the underlying sits at the money.
Maximum positive theta. You sell the two options with the most extrinsic value in the chain, so daily decay works hardest for you.
Maximum negative vega. Rising IV is very damaging; the structure requires low or falling volatility to work.
Gamma is very negative away from the centre. Any price move produces accelerating gamma losses, especially far from the middle.
Position Management
- 01 Monitor Price Strictly This is critical: if price moves more than 2–3% from the centre strike, the position begins to deteriorate. Be aggressive about closing once it leaves the zone.
- 02 Close Early on Profit Do not wait for expiration. If you reach 50–75% of maximum gain — for example $200–300 of $400 — close the entire structure. It cuts gamma risk sharply.
- 03 Be Ready to Adjust If price moves, you may need to close one wing and hold an asymmetric position, or close entirely and start fresh.
- 04 Check IV Before Opening Iron butterflies are far more profitable when IV is high, since you are selling expensive options. Avoid opening them at low IV; wait for a higher-volatility environment.
- 05 Define a Total Stop Loss If the position reaches 2× the maximum loss, close it completely rather than risking multiple assignment at expiration.