Multi-Outcome Markets
How Polymarket multi-outcome markets differ from yes/no markets, why the prices across outcomes add up to about $1.00, and what copying into a single leg actually means.
Last updated August 22, 2026
Some questions have more than two answers. Who wins the nomination, which team takes the title, which number a central bank lands on. Polymarket handles these as multi-outcome markets, and they behave a little differently from a straight yes/no.
How they differ from yes/no
A binary market has one question and two sides. You buy YES or you buy NO, and the two prices add to about $1.00 because exactly one of them pays. A multi-outcome market lists several candidates, each with its own price, and you buy the one you think will happen. Every share still pays $1.00 if its outcome occurs and $0 otherwise. The rule never changes. There are simply more ways to be wrong.
How the prices relate to each other
Across all the outcomes in a market, the prices add up to roughly $1.00, because exactly one of them will pay. That gives you a fast sanity check and a fast read of the field.
| Outcome | Price | Implied probability | 100 shares cost | Payout if it wins |
|---|---|---|---|---|
Candidate A | 48¢ | about 48% | $48 | $100 |
Candidate B | 31¢ | about 31% | $31 | $100 |
Candidate C | 15¢ | about 15% | $15 | $100 |
Someone else | 7¢ | about 7% | $7 | $100 |
The total here is 101¢ rather than exactly 100¢. A small excess is normal and comes from the spread on each leg. A large one usually means at least one leg is thinly traded and its price has drifted out of line with the rest.
Because the legs are linked, news that lifts one outcome has to push the others down. If a favourite jumps ten cents, that ten cents comes out of the rest of the field. Watching only the leg you own can make a move look bigger or smaller than it really is.
What copying into one leg means
When you copy a trade in a multi-outcome market, you are copying one specific leg, not a view on the market as a whole. You own shares in that outcome. If it happens they pay $1.00 each. If any other outcome happens they pay nothing, and it makes no difference which of the others it was.
Two things follow. Each leg has its own order book, so a market that looks busy overall can have one thin leg, and that is the leg your order fills in. Check the liquidity on the outcome you are buying rather than the market headline. And longshot legs move differently: a 7¢ leg can double to 14¢ on a rumour and be back at 6¢ an hour later, which makes both your entry and your exit much less predictable than on a 50¢ binary.
Resolution
One outcome resolves to $1.00 and every other outcome resolves to $0. Some markets also define what happens if none of the listed outcomes occurs, usually through a catch-all leg or a rule that voids the market. That is written into the market rules, and it is the part worth reading before you buy a longshot.