Iron Butterfly

What Is an Iron Butterfly?

An iron butterfly sells an at-the-money straddle and buys out-of-the-money wings for protection. The short ATM straddle generates maximum premium for the expiration. OTM long options cap losses on large moves.

The position collects large upfront credit and profits if the underlying closes very near the short strike at expiration. The profit zone is tighter than an iron condor, but the credit is substantially higher, often creating a better breakeven range despite the narrower target.

Example structure (stock at $100):

• Sell the $100 call for $3.50
• Sell the $100 put for $3.50
• Buy the $110 call for $0.75
• Buy the $90 put for $0.75
• Net credit: $5.50 ($550 per contract)
• Max profit: $550 (underlying expires exactly at $100)
• Max loss: $4.50 per side (wing width of $10 minus $5.50 credit)
• Breakevens: $94.50 and $105.50

Why It Matters for Options Traders

The iron butterfly sits between the iron condor (wider range, less credit) and the short straddle (maximum credit, unlimited risk). For traders expecting the underlying to pin near a specific price, it offers high credit with defined risk.

Theta decay is the engine. Both short options are at-the-money, carrying maximum extrinsic value and fastest decay. If the underlying stays near the short strike, the position collects premium rapidly.

The butterfly works best in high IV environments where inflated ATM premiums generate large credits. Traders often target strikes corresponding to max pain or technical levels, increasing the probability the underlying gravitates to the short strike.

The weakness is precision: the underlying must stay within a tighter range than a condor to reach maximum profit. A 1% move in a $100 stock impacts a butterfly more than a condor with strikes 5% away. Adjustments (rolling the untested side closer) can manage positions moving against the initial strike.

Key Characteristics

• Structure: Short ATM straddle (call and put at same strike) with OTM wings on both sides
• Maximum profit: Net credit received, achieved when underlying closes exactly at the short strike
• Maximum loss: Wing width minus net credit (on either side), capped by the OTM long options
• Profit zone: Tighter than an iron condor — typically extends the credit amount on each side of the short strike
• Theta: Strongly positive — ATM options decay the fastest; benefits accelerate as expiration approaches
• Comparison to iron condor: Higher credit, tighter range; condor trades lower credit for wider room
• Ideal environment: High IV with expectation of near-term stability; pinning behavior near a specific strike