Butterfly Spread
A neutral options strategy using three strike prices that profits when the underlying stock stays near the middle strike at expiration, with limited risk and limited reward.
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Explained Simply
A butterfly spread combines a bull spread and a bear spread with a shared middle strike. The classic long call butterfly: buy 1 call at strike A (lower), sell 2 calls at strike B (middle), buy 1 call at strike C (higher), where B is equidistant from A and C.
Maximum profit occurs when the stock closes exactly at strike B at expiration. Maximum loss is the net premium paid (debit butterfly) or the net credit minus the wing width (credit butterfly). The trade profits from time decay and low realized volatility.
Butterfly spreads are used when you expect a stock to stay near a specific price — for example, pinning to a round number at options expiration, or staying flat after a binary event resolves. They are extremely capital-efficient: a $5-wide butterfly on a $100 stock might cost $1.00-1.50, with a max profit of $3.50-4.00.
Variations include put butterflies, broken-wing butterflies (unequal wing widths, creating a directional bias), and iron butterflies (selling an ATM straddle and buying OTM wings).
Types of Butterfly Spreads
Long Call Butterfly: Buy 1 ITM call + sell 2 ATM calls + buy 1 OTM call. Pay a small debit. Max profit at the middle strike. Example: stock at $100, buy $95 call, sell 2x $100 calls, buy $105 call for $1.50 debit. Max profit = $5 - $1.50 = $3.50 if stock closes at $100.
Long Put Butterfly: Same structure using puts. Identical profit profile. Choose puts vs calls based on which has better liquidity and tighter bid-ask spreads.
Iron Butterfly: Sell 1 ATM call + sell 1 ATM put + buy 1 OTM call + buy 1 OTM put. Collects a net credit. Wider max-profit zone than a standard butterfly but lower max profit. Essentially a short straddle with protective wings.
Broken-Wing Butterfly: Unequal wing widths (e.g., buy $95, sell 2x $100, buy $110). Creates a directional bias — zero or small credit on one side, wider risk on the other. Used when you have a slight directional lean but still expect low volatility.
When to Use a Butterfly Spread
Low-volatility expectations: Butterflies profit from low realized volatility. If you expect a stock to trade in a tight range over the next 1-2 weeks, a butterfly centered on the current price captures time decay without requiring directional accuracy.
Earnings pinning: Stocks often "pin" to heavily traded strike prices near expiration because market makers hedge their gamma exposure by buying dips and selling rallies, creating a gravitational pull toward max pain. A butterfly centered on the likely pin price can be very profitable.
Capital efficiency: A butterfly costs far less than a straddle or strangle, making it suitable for smaller accounts. The risk is limited to the premium paid.
When NOT to use: Before earnings or other binary events where a large move is expected. If the stock moves outside the wings, you lose the entire premium. Also avoid butterflies on illiquid options where wide bid-ask spreads erode the theoretical edge.
How to Use Butterfly Spread
- 1
Trade Broken Wing Butterflies
A broken wing butterfly moves one wing further from the body, creating an asymmetric risk profile. For a bullish broken wing call butterfly: buy 1 ITM call, sell 2 ATM calls, buy 1 further OTM call. This can be entered for a credit while maintaining upside potential.
- 2
Use Butterflies for Earnings Pin Trades
If you expect a stock to stay near a specific price after earnings, center a butterfly there. Buy a narrow butterfly (strikes $2 apart) for minimal cost. If the stock pins near your center strike, the butterfly expands to near-maximum value — a high R:R play on low-movement events.
- 3
Adjust and Roll Active Butterflies
If the stock drifts away from your center strike, roll the butterfly by closing it and opening a new one centered at the current price. This costs a small debit but resets the probability. Only roll if the underlying thesis (range-bound, pinning) is still valid.
Frequently Asked Questions
What is a butterfly spread in simple terms?
A butterfly spread is an options strategy that makes money when a stock stays near a specific price. You use three strike prices: buy one option below, sell two at the target price, and buy one above. Maximum profit is if the stock closes exactly at the middle strike at expiration. Maximum loss is the small premium you paid to enter. Think of it as a bet that the stock will stay put.
Is a butterfly spread a good strategy for beginners?
Butterflies are moderately complex (3 legs, 4 contracts), so they are not ideal for complete beginners. However, the risk is limited and defined upfront, which makes them safer than many strategies. Start by paper trading butterflies on high-liquidity stocks with tight bid-ask spreads. Understand that the narrow profit zone means most butterflies expire at a loss — the wins need to be large enough to compensate.
How Tradewink Uses Butterfly Spread
Tradewink deploys butterfly spreads in range-bound regime environments when the AI identifies a stock likely to pin near a specific price level — typically at round numbers, max pain, or near strong support/resistance zones. The narrow max-profit zone makes butterflies best used 7-14 days before expiration when gamma is high and the pinning effect is strongest.
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See Butterfly Spread in real trade signals
Tradewink uses butterfly spread as part of its AI signal pipeline. Get daily trade ideas with full analysis — free to start.