Polymarket just rolled out one of the most requested features in prediction markets: the ability to combine multiple bets into a single position. Think of it as the crypto-native version of a parlay, the betting format that turned your friend’s $10 NFL Sunday wager into either a very good or very bad Monday morning.
The feature, called Combos, went live around June 10-11 and allows users to bundle picks across different markets into one YES or NO trade. The catch, as with any parlay, is that every single leg needs to resolve in the user’s favor for a payout. Get four out of five right and you still walk away with nothing.
How Combos actually work
The platform introduced a Request-for-Quote (RFQ) mechanism that routes Combo trade requests to competing market makers. Those market makers then race to price and fill the order. Market makers have 400 milliseconds to submit their quotes, and users get 10 seconds to accept once a price comes back.
Payouts are calculated by multiplying the implied probabilities of each individual leg together. So if you combine three positions each priced at 50% probability, your Combo payout reflects the combined 12.5% chance of all three hitting.
