A Butterfly Credit and Debit Can Produce the Same Expiration Profit

One four-contract position puts $350 into an account. Another takes $150 out. In the fictional example below, both earn $350 if the shares finish at $50 and both lose $150 if the shares finish outside the $45 and $55 wings. Reading only the opening credit would miss their shared expiration result.

The credit position is a short iron butterfly. The debit position is a long call butterfly. Their different calls and puts create different opening cash flows and different exercise obligations. Once every option's expiration value and the original premium are included, this particular pair has the same profit-and-loss line.

That equality depends on the matching strikes, expiration, contract size and stated entry prices. It does not mean any iron butterfly and call butterfly found in a live chain will earn the same amount. Nor does it make a credit safe to spend or establish which position suits an investor.

Two structures around the same three strikes

The Options Industry Council describes a long call butterfly as one long call at a lower strike, two short calls at the middle strike and one long call at an upper strike. The wings are equally spaced and every option has the same expiration.

A short iron butterfly instead holds a lower-strike long put, a middle-strike short put and short call, and an upper-strike long call. OIC identifies the call butterfly as a comparable position and explains that the iron version receives a premium at entry. The word "short" in this strategy's name does not mean its expiration payoff benefits from an unlimited fall in the shares.

Use fictional Cedar shares at $50 and one future expiration, 30 calendar days after entry. These are standard, unadjusted American-style equity options with physical share delivery and a 100-share contract size. OCC's equity-option specifications explain those terms and warn that corporate actions can change the deliverable.

For the call butterfly, buy one $45 call for $6.40, sell two $50 calls for $3.10 each, and buy one $55 call for $1.30. The opening debit is:

($6.40 - 2 x $3.10 + $1.30) x 100 = $150 paid

For the iron butterfly, buy one $45 put for $1.40, sell one $50 put for $3.10, sell one $50 call for $3.10, and buy one $55 call for $1.30. The opening credit is:

($3.10 + $3.10 - $1.40 - $1.30) x 100 = $350 received

Each position contains four option contracts. Both have $5 between the middle strike and either wing. All prices, the company label and the 30-day interval are fictional. The calculation assumes that all legs remain intact until expiration and are valued together at the same share price. It excludes commissions, fees, taxes, bid-ask effects, interest, dividends, early exercise and any stock exposure left after expiration. These are illustrative entry prices, not executable quotes or predicted market prices.

Reconcile the final value with the opening cash

At a $50 expiration price, the call butterfly's $45 call has $5 per share of intrinsic value. Its other calls have zero intrinsic value. The combined options are worth $500 in the expiration calculation, from which the $150 entry debit is subtracted. Gross profit is $350.

At the same $50 price, none of the iron butterfly's options has intrinsic value. Its signed option payoff is zero, leaving the $350 opening credit as gross profit. That is a payoff calculation, not a guarantee that every option will expire without exercise or that the account will have no share position afterwards.

At $45, the call butterfly has zero combined intrinsic value and loses its $150 debit. The iron butterfly's short $50 put creates a $500 intrinsic obligation; its other options contribute zero at that price. The $350 received at entry offsets part of the obligation, leaving a $150 loss. At $55, the call butterfly's $45 call gains $1,000 while its two short $50 calls subtract $1,000. The iron butterfly has a $500 short-call obligation. Both again lose $150 after their respective opening cash flows.

The comparison below reports dollars for one complete four-contract set. A negative signed option payoff is an obligation in the intrinsic-value calculation, not a negative quoted option premium. For physically delivered equity options, these figures are economic values of the legs, not promised cash-settlement payments.

The call position's gross profit or loss is its signed option payoff minus $150. The iron position's gross profit or loss is its signed option payoff plus $350. The $500 difference between their option payoffs offsets the $500 difference in their opening cash flows.

Both therefore break even at $46.50 and $53.50 in this model. Each has a $350 maximum gross expiration profit at $50 and a $150 maximum gross expiration loss at or below $45 or at or above $55. The call-butterfly explanation develops the narrow peak. An iron condor has separate short strikes, so its central maximum-profit region has a different shape.

Matching entry prices are part of the equality

For these equally spaced, matched contracts, the call butterfly's signed intrinsic payoff exceeds the iron butterfly's signed intrinsic payoff by one wing width at every expiration share price. Net profit matches when the entry debit plus entry credit equals that width in the same units. Here, $1.50 plus $3.50 equals $5 per share.

A different entry price changes the comparison. If the call debit were $1.60 per share while the iron credit remained $3.50, the call position would earn $10 less per set at every expiration price before other costs. The identical strike labels would no longer produce identical net profit. This is arithmetic under a changed fictional assumption, not a claim that either price is available.

Today's exit requires actual prices for the remaining legs, rather than their final intrinsic values. Financing the entry debit and maintaining collateral against a credit position can also differ. The opening credit does not establish withdrawable cash, the broker's buying-power requirement or a rate of return on committed capital. OIC's bid-and-ask explanation describes the gap between an expected price and a fill. Neither structure is shown to have a cheaper or more liquid exit here.

Different short options create different account obligations

The call butterfly has two short $50 calls. The iron butterfly has one short $50 call and one short $50 put. If assigned, a standard short call requires delivering 100 shares at its strike, while a standard short put requires purchasing 100 shares at its strike. American-style options can face assignment before expiration.

FINRA's assignment guidance warns that the obligation remains even when another owned option limits a spread's overall risk. The investor must exercise that option or take other action when needed. Long wings do not arrange funding, acquire stock or submit exercise instructions automatically.

OIC warns of uncertain short-option assignment near the middle strike for both butterfly structures. A modeled $50 finish does not assure the same post-expiration account. A surviving share position, a missed exercise deadline or a separately closed leg can create exposure outside the intact-position calculation. Check the broker's approval, collateral, exercise deadlines and liquidation procedures, together with the actual deliverable and any corporate-action notice. The exercise-versus-assignment guide provides the foundation.

The current OCC options disclosure gateway links the disclosure document investors should read. Its transaction-cost, tax and margin discussion explains why those items can alter an illustrative result. Equivalent gross expiration profit does not promise equivalent after-tax profit, and the $150 modeled loss is no substitute for a funded account plan.

When comparing a credit and debit strategy, record the opening cash flow beside each leg's signed expiration value. Then compare the complete profit-and-loss results, costs and account obligations at the same prices and deadline. Use expiration breakeven and loss measures and liquidity checks for those separate questions.

Sources and scope

Primary sources checked 13 October 2026, Australia/Brisbane: OIC's long call butterfly, short iron butterfly and bid-and-ask guidance; OCC's equity-option specifications, current disclosure gateway and linked June 2024 disclosure document; and FINRA's assignment explanation. The worked example is author arithmetic, not market data, a model forecast or customer experience.

This is Options Matrix Pro general education, not personal financial, investment, legal or tax advice, and it does not recommend entering, holding or exiting either position. Options involve risk and are not suitable for all investors. OMP learning links refer to our own educational material; the editorial policy explains our attribution and standards.