What is an unbalanced butterfly spread?

It is a butterfly with unequal numbers of contracts at its three strikes, such as buying one call, selling three calls at a higher strike, and buying two calls at a strike further up. Because long and short contract counts match, the position is flat beyond the outer strikes and the loss is defined. The extra short calls generate a credit but enlarge the loss zone on one side.

How do you calculate profit and loss on an unbalanced butterfly?

Compute each leg's intrinsic value at expiration, multiply by its contract count and by 100, then net the long legs against the short legs and add the credit or subtract the debit. At $115 in the example, the long $100 call is worth $1,500, the three short $105 calls cost $3,000, and the $115 calls are worthless, for a loss of $1,500 before the $70 credit.

Unbalanced butterfly vs broken wing butterfly: what is the difference?

A broken wing butterfly keeps the standard 1 by 2 by 1 contract ratio but moves one wing further away. An unbalanced butterfly changes the contract ratio, for example 1 by 3 by 2, and may also use uneven wings. Both skew the payoff toward one side and are often opened for a credit, but the unbalanced version has a steeper and larger loss zone.

Is an unbalanced butterfly a defined risk trade?

Yes, as long as the total number of long contracts equals the total number of short contracts. In a 1 by 3 by 2 structure the three long calls fully cover the three short calls once the stock passes the upper strike, so the loss stops growing there. If the counts did not match, the position would carry unlimited risk like a ratio spread.

Where is the breakeven on a 1 by 3 by 2 butterfly?

For a credit version there is one breakeven above the short strike. Between the short strike and the upper strike the position loses $2 for every $1 the stock rises, because two short calls are uncovered, so the breakeven is the short strike plus half of the sum of the lower wing width and the credit. In the example that is $105 plus half of $5.70, or $107.85.

What happens to an unbalanced butterfly if the stock crashes?

If the trade was opened for a credit, every option expires worthless and you keep the credit. If it was opened for a debit, you lose the debit. Either way the result is small and known in advance, which is why the structure suits traders who want to lean bullish without downside exposure.

Unbalanced Butterfly Calculator & strategy guide

Butterflies & RatiosAdvancedNeutralDefined risk

A butterfly-style spread with unequal contract quantities to tilt the payoff profile.

Payoff at expiration

Worked example: XYZ at $100, 45 days to expiration

Profit Loss Breakeven

Max profit: +$570; Highest near the short strike, adjusted by net debit or credit
Max loss: −$1,430; Defined by wing widths, quantities, and net premium
Breakeven: $107.85; Depends on strikes, quantities, and net premium

The trade · net credit $0.70 a share ($70)

Buy $100 call · $3.50
Sell 3 $105 calls · $1.60
Buy 2 $115 calls · $0.30

Price this unbalanced butterfly on SPY with today's chain — then change the ticker, strikes and expiry.

Open in Build

What is an unbalanced butterfly?

An unbalanced butterfly, sometimes called a ratio butterfly, is a butterfly spread with unequal contract counts across its three strikes. Instead of the standard 1 by 2 by 1 structure, this version buys one call at the lower strike, sells three calls at the middle strike, and buys two calls at the upper strike. The number of long calls still equals the number of short calls, so the position is flat beyond the outer strikes and the risk remains defined.

Selling the extra call at the middle strike collects more premium than a standard butterfly, and the position is usually opened for a net credit. That credit is kept if the stock stays below the lowest strike, and it adds to the profit at the peak. The trade-off is that the extra short call and the wider upper wing create a much larger loss zone above the short strikes than a standard butterfly would have.

The payoff curve rises from a small flat profit on the downside to a peak at the short strike, then falls twice as steeply on the far side because two of the three short calls are uncovered until the upper strike is reached. Beyond the upper strike the curve flattens at the maximum loss. It appeals to traders who expect a drift toward the short strike and see a large move beyond it as unlikely.

Setup

Leg	Strike	Expiry
Buy 1 call	At the money	Near
Sell 3 call	1 strike OTM	Near
Buy 2 call	3 strikes OTM	Near

Unbalanced Butterfly example

XYZ trades at $100 with 45 days to expiration. You buy one $100 call for $3.50, sell three $105 calls for $1.60 each ($4.80 total), and buy two $115 calls for $0.30 each ($0.60 total). Total paid is $4.10 and total collected is $4.80, so the trade opens for a net credit of $0.70 per share, or $70 for the full 1 by 3 by 2 position.

Stock at expiration	Result
$100 or below	All six contracts expire worthless. You keep the $70 credit.
$105	The $100 call is worth $5.00 ($500). The three short $105 calls and the two $115 calls expire worthless. P&L is $500 plus the $70 credit, or $570, the maximum profit.
$107.85	Breakeven. The $100 call is worth $7.85 ($785). The three short $105 calls cost $2.85 each ($855). Intrinsic value nets to −$70, which the $70 credit offsets exactly.
$115 or above	The $100 call is worth $15.00 ($1,500). The three short $105 calls cost $10.00 each ($3,000). Above $115 the two long $115 calls offset the two extra short calls, so the loss stops growing. Net intrinsic is −$1,500, plus the $70 credit gives −$1,430, the maximum loss.

Maximum profit is $570 if XYZ closes at $105. Maximum loss is $1,430 if it closes at or above $115. There is no downside risk because the position was opened for a credit, and the single breakeven is $107.85, so the loss zone begins just $2.85 above the short strike.

When to use an unbalanced butterfly

You expect the stock to rise modestly toward a specific level and stall, and you want a larger payoff at that level than a vertical spread offers.
You want to open a butterfly for a credit so that a stock that goes nowhere or falls still produces a small profit.
Implied volatility is elevated, which makes the three short middle calls worth more relative to the wings.
You are comfortable with a payoff that is heavily skewed, where the maximum loss is more than double the maximum gain, in exchange for a high probability of a small win.
Typical entries use 30 to 60 days to expiration with the short strike set at a resistance level or a price target and the upper wing one or two strikes beyond a standard butterfly.

Risks to understand

The upside loss is large relative to the reward. In the example a rally past $115 loses $1,430 against a best case of $570, and the loss zone starts less than $3 above the short strike.
Three short calls at one strike produce concentrated gamma. Near expiration, with the stock close to $105, the position can move from maximum profit to a sizeable loss within a few dollars of stock movement.
All three short calls can be assigned early once in the money, and partial assignment leaves an awkward mix of stock and options.
Rising implied volatility works against the trade when the stock is near the body, because the short calls are the most sensitive to volatility.
The position has six contracts across three strikes, so commissions and bid-ask slippage are higher than on a two-leg spread and can eat a large fraction of a $0.70 credit.

Managing the trade

Enter with a single multi-leg limit order. With six contracts and a small net credit, legging in is likely to lose the edge to slippage.
If the stock moves toward the short strike well before expiration, consider closing for a partial gain, since the full peak value only appears in the final days and holding on exposes you to gamma.
If the stock breaks above the short strike with time remaining, buying back one of the three short calls converts the position into a standard butterfly and caps the additional loss.
When the stock threatens the loss zone, the upper wing can be rolled up or the whole position rolled out in time, though rolling six contracts is expensive.
Set a loss limit in advance, often around the size of the maximum profit, and close when it is hit rather than hoping for a reversal back toward the body.

Unbalanced Butterfly FAQs

What is an unbalanced butterfly spread?: It is a butterfly with unequal numbers of contracts at its three strikes, such as buying one call, selling three calls at a higher strike, and buying two calls at a strike further up. Because long and short contract counts match, the position is flat beyond the outer strikes and the loss is defined. The extra short calls generate a credit but enlarge the loss zone on one side.
How do you calculate profit and loss on an unbalanced butterfly?: Compute each leg's intrinsic value at expiration, multiply by its contract count and by 100, then net the long legs against the short legs and add the credit or subtract the debit. At $115 in the example, the long $100 call is worth $1,500, the three short $105 calls cost $3,000, and the $115 calls are worthless, for a loss of $1,500 before the $70 credit.
Unbalanced butterfly vs broken wing butterfly: what is the difference?: A broken wing butterfly keeps the standard 1 by 2 by 1 contract ratio but moves one wing further away. An unbalanced butterfly changes the contract ratio, for example 1 by 3 by 2, and may also use uneven wings. Both skew the payoff toward one side and are often opened for a credit, but the unbalanced version has a steeper and larger loss zone.
Is an unbalanced butterfly a defined risk trade?: Yes, as long as the total number of long contracts equals the total number of short contracts. In a 1 by 3 by 2 structure the three long calls fully cover the three short calls once the stock passes the upper strike, so the loss stops growing there. If the counts did not match, the position would carry unlimited risk like a ratio spread.
Where is the breakeven on a 1 by 3 by 2 butterfly?: For a credit version there is one breakeven above the short strike. Between the short strike and the upper strike the position loses $2 for every $1 the stock rises, because two short calls are uncovered, so the breakeven is the short strike plus half of the sum of the lower wing width and the credit. In the example that is $105 plus half of $5.70, or $107.85.
What happens to an unbalanced butterfly if the stock crashes?: If the trade was opened for a credit, every option expires worthless and you keep the credit. If it was opened for a debit, you lose the debit. Either way the result is small and known in advance, which is why the structure suits traders who want to lean bullish without downside exposure.