Butterfly Spread Options Explained (With a Real Example)

A butterfly spread is the options structure you reach for when you think a stock is going nowhere and you want to be paid precisely for being right about that. It uses three strike prices and four contracts, your risk is capped the moment you open it, and the payoff peaks at exactly one price. I trade options and swing setups myself, and butterflies are the strategy where the gap between the textbook numbers and the fill you actually get matters most.

Key Takeaways

• A butterfly spread combines a bull spread and a bear spread into one position: buy one lower strike, sell two middle strikes, buy one upper strike, all in the same expiration.
• Max profit lands at the middle strike and equals the wing width minus the net debit. Max loss equals the net debit and is reached outside either outer strike.
• The payoff ratio looks excellent on paper (often 2:1 or better), but the profit window is narrow and four-leg fills are expensive, so the strategy only works if you measure your hit rate across many trades.

What Is a Butterfly Spread?

A butterfly spread is a four-contract, three-strike options position built entirely in one expiration cycle. You buy one contract at a lower strike, sell two contracts at a middle strike, and buy one contract at a higher strike. The two outer strikes are called the wings and the doubled middle strike is the body, which is where the insect name comes from.

Structurally it is a bull spread and a bear spread stacked on top of each other, sharing the same middle strike. The bull spread makes money as the stock rises toward the body and the bear spread makes money as it falls toward the body, so the combined position is at its most valuable when the stock finishes exactly at the middle strike. Move far enough in either direction and both halves cancel out, which is why your loss is capped.

That makes a butterfly a neutral, low-volatility structure. You are not betting on direction. You are betting that the stock finishes near a specific price, and that implied volatility does not expand while you wait. It sits in the same family as the iron condor, which trades the same neutral thesis across a wider range for a smaller payoff. Both belong to the defined-risk group covered in our guide to options trading strategies.

The Three Strikes and Four Contracts

Standard butterflies are symmetrical, which means the distance from the lower wing to the body equals the distance from the body to the upper wing. If your body sits at $100 and your lower wing at $95, your upper wing goes at $105. That symmetry is what produces the clean triangular payoff diagram, and breaking it on purpose is what creates the broken wing variant covered further down.

Three placement decisions do most of the work:

• Where you put the body. The body is your price target. Put it where you actually expect the stock to finish, not where the current price sits, unless those are the same thing.
• How wide you make the wings. Wider wings cost more and widen the profit window. Narrower wings cost less and pay a higher ratio inside a tighter window.
• Which expiration you use. A butterfly is a theta-positive position that reaches full value only at expiration, so a cycle that is too far out will barely move even when you are right.

All four legs go on as a single order. Never leg into a butterfly one contract at a time on a liquid underlying; you will pay more in slippage than the structure is worth. Any modern platform, including thinkorswim, TradingView-linked brokers, and tastytrade, will build the four legs as one spread order with a single net price.

Max Profit, Max Loss, and the Two Breakevens

For a standard long butterfly opened for a net debit, the four numbers you need are fixed the moment you get filled:

• Max profit = wing width minus net debit, reached only if the stock closes exactly at the middle strike at expiration.
• Max loss = net debit, reached anywhere at or below the lower wing or at or above the upper wing.
• Lower breakeven = lower strike plus net debit.
• Upper breakeven = upper strike minus net debit.

Two things follow from that math and both are easy to miss. First, the profit window between the breakevens is always exactly twice the wing width minus twice the debit, so a cheap butterfly has a wide window relative to its cost and an expensive one does not. Second, the maximum profit is a single point on a continuous price line, so you will essentially never collect it. Plan around capturing 40 to 60% of theoretical max, not 100%.

A short butterfly, where you sell the wings and buy the body, inverts every one of these. It is opened for a credit, it profits when the stock moves away from the middle strike in either direction, and its max loss is the wing width minus the credit received.

A Worked Long Call Butterfly Example

Take a stock trading at $100 with an earnings report already behind it and a 30-day expiration cycle. You expect it to drift sideways. You build a long call butterfly:

• Buy 1 call at the $95 strike for $7.00
• Sell 2 calls at the $100 strike for $3.50 each, collecting $7.00
• Buy 1 call at the $105 strike for $1.50

Net debit is $7.00 minus $7.00 plus $1.50, which is $1.50, or $150 per butterfly including the standard 100-share multiplier. That $150 is the entire amount you can lose.

Now run the numbers. Wing width is $5.00, so max profit is $5.00 minus $1.50, which is $3.50, or $350. That happens only if the stock closes at exactly $100. Your breakevens are $95 plus $1.50, which is $96.50, and $105 minus $1.50, which is $103.50. The stock has to finish inside a $7 window, which is 7% wide on a $100 stock, for the trade to make anything at all.

Check it at the top: at a $100 close, the $95 call is worth $5.00, both $100 calls expire worthless, and the $105 call expires worthless, so the position is worth $500 against a $150 cost. That is your $350. At $103.50 the $95 call is worth $8.50, the two short $100 calls cost you $7.00, and the $105 call is worthless, leaving $1.50, which is exactly what you paid. Risk to reward is 350 to 150, or roughly 2.3 to 1.

That ratio is the pitch. The catch is the 7% window, and the honest way to evaluate it is to ask how often a stock you follow closes inside a 7% band 30 days out. If the answer is less than about 30% of the time, the trade is negative expectancy no matter how attractive the ratio looks.

The Six Butterfly Variants

Every butterfly is one of six structures. The first four use a single option type, and the last two mix calls and puts.

Long call butterfly

Buy one lower call, sell two middle calls, buy one upper call. Opened for a debit, profits when the stock finishes near the middle strike. This is the default construction and the one used in the example above.

Short call butterfly

Sell one lower call, buy two middle calls, sell one upper call. Opened for a credit, profits when the stock moves decisively away from the middle strike in either direction. It is a cheap way to express “something is going to happen here” without picking a side, and the credit received is your maximum gain.

Long put butterfly

Buy one lower put, sell two middle puts, buy one upper put. The payoff diagram is identical to the long call butterfly at the same strikes. Traders choose puts over calls when the put side of the chain is more liquid or when the skew makes the put version cheaper to open.

Short put butterfly

Sell one lower put, buy two middle puts, sell one upper put. Credit structure, same movement thesis as the short call butterfly, built entirely from puts.

Iron butterfly

Sell an at-the-money call and an at-the-money put at the body, then buy an out-of-the-money call above and an out-of-the-money put below as protection. It is opened for a credit and reaches max profit when the stock finishes at the short strike, exactly like a long butterfly, but the credit structure means you collect premium up front rather than paying a debit. Our breakdown of iron condor vs iron butterfly walks through when the tighter iron butterfly is worth the higher assignment risk.

Reverse iron butterfly

Buy the at-the-money call and put, sell the out-of-the-money wings. Opened for a debit, this is a long-volatility structure that profits from a sizable move in either direction while the sold wings reduce the cost compared with a naked straddle.

The Broken Wing Butterfly

A broken wing butterfly deliberately breaks the symmetry by pushing one wing further out than the other. That single change removes risk from one side of the trade entirely and concentrates it on the other, and in many cases it lets you open the position for a credit instead of a debit.

Take the same $100 stock. Instead of buying the $105 call, you buy the $110 call, leaving a $5 wing below the body and a $10 wing above it. Suppose that structure opens for a $0.50 credit. Here is what happens at expiration:

• Stock finishes below $95: every leg expires worthless and you keep the $0.50 credit, a $50 gain.
• Stock finishes at $100: the spread is worth $5.00 and you also keep the credit, for $5.50, or $550.
• Stock finishes at or above $110: the spread settles at negative $5.00 against your $0.50 credit, a $4.50 loss, or $450.

Read that carefully. There is no downside loss at all. You cannot lose money if the stock falls, because the credit covers you, and the only way to be hurt is a rally past the far wing. That is the whole appeal: a broken wing butterfly converts a two-sided bet into a one-sided one, and it is the variant most active traders actually place.

The tradeoff is that the risk you kept is larger than the risk in the symmetrical version, $450 against $150, and it lives on the side the market is most likely to move if a trend develops. Place the wide wing on the side you consider least likely, and size the position off the $450 number rather than the credit.

When a Butterfly Beats an Iron Condor

Both structures are neutral and defined-risk, so the real question is how confident you are about where the stock finishes rather than whether it moves.

Use a butterfly when you have an actual price target: a gap fill, a prior consolidation shelf, a strike with heavy open interest that has been acting as a magnet. The butterfly concentrates the entire payoff at that one price and pays a much better ratio than a condor for being right about it.

Use an iron condor when your thesis is only “it stays in this range.” A condor spreads the profit zone across a band instead of a point, which raises your hit rate and lowers your payoff. Comparing the two head to head, the $95/$100/$105 butterfly above pays 2.3 to 1 inside a $7 window, while a comparable condor might pay 0.4 to 1 inside a $20 window. Neither is better in the abstract; they are priced for different levels of precision, and the strategy selection guide in our roundup of the most successful options strategies works through the same tradeoff across the wider strategy set.

The Greeks and a Butterfly Spread

A long butterfly with the body at the money starts close to delta neutral, because the long lower wing and the two short body contracts largely offset. Delta grows as the stock drifts away from the body, and it works against you: the position gets short as price rises above the body and long as price falls below it, which is the structure quietly trying to pull you back toward the target.

Theta is positive and it is the main engine. Time decay erodes the two short body contracts faster than the wings, so a butterfly that is sitting near its target gains value simply by waiting. That gain is heavily backloaded, and most of it arrives in the final two weeks.

Vega is negative, which matters more than most guides admit. A long butterfly loses value when implied volatility expands, so opening one into an earnings announcement or a scheduled macro event means fighting a volatility bid even when your price thesis is correct. If you are tracking IV to time these entries, the approach in our guide to implied volatility rank in thinkorswim applies directly here.

Managing a Butterfly Before Expiration

Because a butterfly only reaches full value at expiration, holding to the last bell is tempting and usually wrong. A butterfly sitting at 50% of max profit with two weeks left is offering you a real, closable number against a payoff that still requires the stock to sit still for another ten sessions.

Three rules that hold up in practice:

• Take profit mechanically. Set a close at 40 to 60% of theoretical max and let it fire. Chasing the last 40% is where most of the strategy’s realized edge disappears.
• Cut early when the thesis breaks. If the stock trades decisively through a wing well before expiration, the position is unlikely to recover and the remaining premium is worth more to you than to the market.
• Close all four legs together. Exit as a single spread order for the same reason you entered as one.

Fills, Commissions, and Pin Risk

This is the part most butterfly guides skip. A four-leg spread crosses four bid-ask spreads. On a liquid, high-volume underlying that might cost you $0.05 to $0.10 of the net price. On a thinner name it can easily be $0.25, which on a $1.50 debit is roughly 17% of the trade’s entire cost before commissions. Always work a limit order at or near the mid, and walk it out in small increments rather than paying the natural price.

Commissions compound the same problem. At a typical per-contract rate, opening and closing a butterfly is eight contract charges, and if your max profit is $350 that is a manageable drag while a $100 max profit on a narrow-wing butterfly may not survive it. Butterflies scale poorly down to tiny sizes for exactly this reason.

Then there is pin risk. If the stock closes very near your middle strike on expiration day, you do not know whether your two short contracts will be assigned, and you can wake up Monday holding an unexpected 200-share position. The clean fix is to close the position before the final session rather than letting it settle, which is also usually the better economic decision anyway.

How to Track Your Butterfly Trades

A strategy that pays roughly 2 to 1 needs to hit somewhere north of 30% of the time to break even, and there is no way to know your real rate from memory. Butterflies are also the trade most likely to be misremembered, because a $350 winner feels much larger than a $150 loser even when you took three of the losers for every winner.

What actually answers the question is a record with the inputs attached: which body strike you chose, how wide the wings were, how many days to expiration, what you paid against the mid, and where the stock finished relative to your target. Once you have thirty or forty of those, the pattern usually turns out to be about strike placement or days to expiration rather than the strategy itself.

If you are just getting started and want something to log into today, the free trading journal template covers the basics in a spreadsheet. For automated import and analytics across every position, the Financial Tech Wiz Trading Journal pulls from 25+ brokers and breaks results down by symbol and hold duration. Either way, our roundup of the best trading journals compares the options across price points.

Pros and Cons of Butterfly Spreads

Pros: risk is capped and known before you enter; the cost of entry is low relative to the potential payoff; the risk-to-reward ratio is among the best available in a neutral structure; and it works in a quiet market where directional strategies have nothing to trade.

Cons: the profit window is narrow and full max profit is essentially unreachable; four legs mean four spreads and eight commission charges over the trade’s life; negative vega punishes you if volatility expands; and pin risk at the short strikes creates an assignment headache if you hold into expiration.

FAQ

Is a butterfly spread profitable?

It can be, but the ratio is misleading on its own. A butterfly paying 2.3 to 1 needs to finish inside its profit window roughly 30% of the time just to break even before costs, and the window is often only 5 to 8% wide. Profitability depends almost entirely on how accurately you place the body strike, not on the structure itself.

How many options are in a butterfly spread?

Four contracts across three strike prices, all in the same expiration. One at the lower strike, two at the middle strike, and one at the upper strike. The two middle contracts are what make it four rather than three.

How do you make a butterfly spread?

Pick the price where you expect the stock to finish and set that as your middle strike. Choose an equal distance above and below for the wings. Then buy one contract at the lower strike, sell two at the middle, and buy one at the upper, submitting all four as a single spread order with a net limit price rather than legging in.

Is a butterfly spread better than a short straddle?

They express a similar neutral view with very different risk. A short straddle collects more premium but carries undefined risk if the stock moves sharply. A butterfly collects less but caps the loss at the net debit. If you want the same thesis with a known worst case, the butterfly is the safer expression, and an iron butterfly sits between the two.

What is the difference between a butterfly and a broken wing butterfly?

A standard butterfly has equal wing widths on both sides of the body. A broken wing butterfly pushes one wing further out, which removes the loss on one side entirely and often lets you open the position for a credit, at the cost of a larger maximum loss on the remaining side.

When should you close a butterfly spread?

Most of the realized edge comes from closing at 40 to 60% of theoretical max profit rather than holding for the full amount. Close early if the stock trades decisively through a wing, and close before the final expiration session to avoid pin risk on the two short middle contracts.