Home › Glossary

What is max loss on an options trade?

In one line: Max loss is the largest amount an options position can lose if the worst case happens; for a put seller or covered-call writer, it's the shares falling to zero, minus the premium.

Trading glossary · Updated 2026-10-26

How it works

Max loss is the worst case, in dollars, known before you place the trade. For an option buyer it's the premium paid. For a seller it's bigger, and it's the number that matters.

"Defined" means the loss has a hard cap: a buyer, or a spread. "Undefined" means no cap: a naked call can lose without limit, because a stock can rise without limit. A cash-secured put sits between the two. The loss is huge but finite, because a stock can't go below zero.

Both trades in the wheel strategy have a defined max loss. It's almost the whole position.

An example (hypothetical)

XYZ trades at $50 (an illustration, not a trade idea). You sell a 30-day $45 put for $1.00 ($100). Cash set aside: $4,500.

Then the story goes wrong. XYZ reports an accounting problem. The stock halts, reopens at $12, and drifts to $8 by expiry.

Nothing you can do at $8 fixes it. You can sell the shares and book −$3,600, or hold and hope. The premium you collected was a thin slice of what was at risk.

Why it matters for sellers

The max loss is the real size of the trade. The $100 is not. Sellers who size by the premium run five of these at once and call it spreading risk. It's $22,500 at risk.

Knowing the number does three jobs. It tells you if the trade fits your account. It shows you what a bad month looks like before it happens. And it makes the stock choice honest: would you hold this to zero? If not, where would you sell, and what's that loss? That smaller number is your planned loss. The max loss is what happens if you don't follow the plan.

A Covered call has the same shape: your share cost times 100, minus the premium. Our options assignment guide shows what the loss looks like in the account.

Questions