Debit Spread

What this structure is

A Debit Spread (Debit Spread) has two legs and costs you a net amount: you buy an option near the price and sell one further out with the same expiration. The sale pays for part of the purchase, so your maximum loss is what you paid and your maximum profit is the gap between the strikes minus that cost.

When it beats an outright long

When implied volatility is expensive (selling gives back part of the cost), and when your forecast has a capped upside anyway ("a rise toward 110, not an open-ended surge"), selling above your target turns a probability you don't bet on into an immediate cash discount. You give up the infinity you never expected.

Its honest economics

It eases all three of your enemies: the cost is lower, Theta is gentler (the short leg decays in your favor, in part), and volatility collapse hurts less (the two legs partly offset), in exchange for a fixed profit cap. The trade-off: earn less in the best case to lose less in every other case.

Hypothetical example

A stock at $100, a forecast of a rise toward $110 within two months, and volatility at its 80th percentile: buy the 100 strike and sell the 110 for a net $3.20, instead of an outright contract at $5.60. At $110: a profit of $6.80 on $3.20 (more than double). Below $100: the loss is $3.20, not $5.60.

Common mistake

Built wider than the forecast: a 100/130 spread for a 110 forecast pays for a probability that won't be used. Size the structure to the target, or it becomes a plain long position in disguise, at its cost.

Why size it to the target

A spread wider than your forecast pays for a probability you won't use. A narrower one cuts the profit before the idea has run its course. Spread width is a decision derived from the measured target, not from a wish for a cheaper premium.

Where to see it on the platform

The structure calculator builds it with both legs and draws its limits. The strategy guide suggests it when you have a limited forecast and expensive volatility.

The structure calculator builds it with both legs and draws its limits. The strategy guide suggests it when volatility is expensive and the forecast is limited.