Butterfly Spread

What Is a Butterfly Spread?

A butterfly spread is a three-legged options strategy constructed by combining two vertical spreads that share a middle strike. The classic long call butterfly buys one call at a lower strike, sells two calls at a middle strike, and buys one call at a higher strike — all with the same expiration. The structure resembles an iron condor compressed to three strikes rather than four.

The trade is typically entered for a net debit and has maximum profit when the underlying closes exactly at the middle strike at expiration. Maximum loss equals the net debit paid, occurring if the underlying closes at or beyond either outer strike. The profit and loss profile creates a peaked tent shape on a chart.

Example (stock at $100):

• Buy 1 $95 call, sell 2 $100 calls, buy 1 $105 call
• Net debit: $1.00 ($100 per structure)
• Max profit: $4.00 at expiration if stock is at $100
• Max loss: $1.00 (the debit paid)
• Breakeven: $96 and $104

Why It Matters for Options Traders

Butterflies are a precision tool. They’re most useful when a trader has a strong conviction about where the underlying will be at expiration — not just directional, but a specific price target. The strategy offers extremely favorable risk/reward ratios (often 4:1 or higher) for a very low net debit, but requires near-perfect timing and price accuracy.

The narrow profit zone is the main challenge. A stock that moves 5% in either direction can turn a maximum-gain butterfly into a maximum-loss outcome. This makes butterflies most popular around specific events where a stock is expected to pin to a known level — earnings when the stock has a history of muted moves, or when a stock is expected to consolidate near a key technical level.

Zero-DTE butterfly spreads have become a popular vehicle for high-precision, same-day trading around market-moving events, particularly on index products like SPX and SPY where the expected move is often well-defined by implied volatility.

Key Characteristics

• Risk profile: Defined risk (net debit) and defined reward (spread width minus total debit)
• Maximum profit zone: Narrow range centered on the middle strike
• Ideal environment: Neutral to slightly directional with a specific price target at expiration
• Variants: Call butterfly, put butterfly, iron butterfly (using both puts and calls), broken-wing butterfly (asymmetric strikes)
• Greeks: Near-zero delta at entry if centered at-the-money; very high gamma near expiration
• Cost: Typically low net debit, offering high potential return relative to risk