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Calculate a two-sided long-volatility payoff14 minute read
Long straddle max profit, loss, and break-even
Calculate long straddle maximum loss, unlimited upside, finite downside profit, two break-even prices, multiplier, fees, IV, time decay, and expiration outcomes.
Prepared by Mark · Primary sources below
Direct answer
A long straddle buys a call and put with common strike K and expiration for total net debit D per share. Maximum expiration loss is D when the underlying finishes at K. The upper break-even is K + D and the lower break-even is K - D. Upside profit is theoretically unlimited. For a stock-like underlying bounded at zero, maximum downside profit is K - D per share if positive, reached at zero. Multiply by contract multiplier and quantity and include costs.
Add both premiums into one debit
Total debit includes the call cost plus put cost, adjusted for any package price improvement. Use the actual combination fill and the same per-share unit as K.
If K = 100 and the call and put cost 4.20 and 3.80, D = 8.00. One standard straddle costs 800 before fees.
Maximum loss concentrates at the strike
At K at expiration, both options have zero intrinsic value and the entire 8.00 debit is lost. Prices between the two break-evens lose less than or equal to that debit.
At 108 the call intrinsic value exactly recovers D; at 92 the put does the same. Costs move the practical break-evens farther from K.
The two tails are not equally unbounded
Above 108, profit rises dollar for dollar and has no theoretical ceiling. Below 92, profit rises as price falls, but a stock cannot fall below zero.
At zero, the put is worth K and the call is worthless, so downside profit is K - D = 92 per share in the example. If D is at least K, the calculated lower break-even is zero or negative and no nonnegative downside expiration price produces a profit.
A percentage move is not enough by itself
The upper move from spot and lower move may differ if K is not exactly spot. Divide each break-even distance by a clearly stated reference price rather than calling D a symmetric percentage move.
Compare both required moves with the same expiration distribution, not a generic expected-move label. Premium already reflects time, IV, skew, rates, dividends, and market supply.
Before expiration, IV and time can dominate
The fixed break-evens apply only at expiration. Earlier, an IV increase may raise both option values without spot crossing either level; IV crush and theta can create a loss after a material move.
Closing both legs uses executable bid-ask prices. Holding into expiration can create long shares from call exercise or short shares from put exercise, subject to contract and broker procedures.
Common questions
What is the long straddle maximum-loss formula?
Add the net premium paid per share for the call and put, multiply by contract multiplier and straddle quantity, and add fees. That amount is lost if both options expire without intrinsic value at the common strike. A close before expiration can realize a different loss because time value, IV, skew, and executable spreads remain.
Does a long straddle have unlimited profit in both directions?
No for a stock-like underlying. Upside profit is theoretically unlimited because the stock has no fixed upper bound. Downside profit stops when stock reaches zero; its maximum before costs is K - D per share. Some materials use unlimited as shorthand for very large two-sided potential, but the lower tail is mathematically finite.
How do I calculate both break-even points?
Add total net debit D to the common strike for the upper break-even and subtract D for the lower one. With K = 100 and D = 8, they are 108 and 92. These are expiration prices before fees, not forecasts or fixed early-exit targets; remaining option value changes the price needed to close profitably earlier.
Can a long straddle profit without crossing an expiration break-even?
Yes before expiration. A rapid IV increase or favorable move can lift the resale value of both options enough to exceed the entry debit while spot remains inside 92–108. The reverse is also possible after IV crush or time decay. Use current combination bids and scenario pricing rather than applying the terminal line to every date.
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