Polymarket US logs record 74 million trades in October

Polymarket US just had its busiest month on record. The platform processed more than 74 million trades in October, a 15% jump from the month before.

The milestone matters because it arrives as regulated prediction markets compete for the same pool of US users.

What drove the October surge

The short answer is sports. Polymarket US expanded its sports contracts, with NFL and college football leading the charge.

The other ingredient was product design. In August 2026, the platform rolled out combo and parlay-style products.

For the uninitiated, a parlay bundles several predictions into one position. Every leg has to hit for the trade to pay out, which raises the risk and the potential reward.

Those bundled products caught on quickly. In some weeks, combo and parlay-style contracts accounted for more than 50% of activity on Polymarket US.

Dollar figures moved alongside the trade count. During one week in October, Polymarket US recorded notional volume of $2.82 billion.

Daily and weekly notional volumes frequently reached into the hundreds of millions of dollars over the month. Notional volume measures the face value of contracts traded, not the platform’s revenue, so it captures how much money is sloshing through the system.

A steep climb from a standing start

Polymarket US launched in late 2025. Earlier in 2026, weekly volumes sat below $100 million. By October, they had climbed into the billions.

Monthly active traders reached an all-time high of approximately 478,000 in October.

October also built on a strong September. The platform logged $8.8 billion in total volume that month, which was its previous record.

Polymarket US operates under the oversight of the Commodity Futures Trading Commission. That regulatory status allows it to offer event contracts to US users through a compliant framework.

Worth noting: the activity numbers reflect trading in regulated contracts. They are not propped up by native token incentives or on-chain trading mechanics, which can sometimes inflate volume figures in other corners of the market.

The Kalshi rivalry heats up

Polymarket US is not alone in this race. Its most direct competitor is Kalshi, another regulated prediction market.

Kalshi has been posting its own eye-catching numbers. The company reported a record $19 billion in contract volume for a single week in October.

The competition is pushing both sides to ship new products faster. Polymarket’s parlay launch in August is a clear example of a feature aimed squarely at sports-minded users.

What this means for prediction markets

The heavy reliance on sports is both a strength and a risk. Football season delivers a predictable burst of activity, but the calendar eventually turns.

Bundled contracts also look a lot like what traditional sportsbooks offer. That similarity could draw more mainstream users, and potentially more scrutiny over how these products are classified and marketed.

Watch three things in the coming months. First, whether monthly active traders keep rising past the approximately 478,000 mark. Second, how trade counts hold up after football season. Third, how Polymarket US and Kalshi respond to each other’s next product moves.

For now, Polymarket US has set a new high-water mark. The 74 million-plus trades in October show how quickly a regulated platform can grow when it lands on the right mix of events and products.