Polymarket is expanding deeper into sports markets by testing parlay-style contracts ahead of the new NFL season, adding a product closely resembling one of the most popular formats offered by traditional sportsbooks.
The prediction market began processing its first parlay trades on August 5, 2026. The feature remains in beta, with traders currently able to combine between two and 10 selections into a single position. Initial testing had already generated more than $7.4 million in trading volume by mid-August.
Polymarket refers to the product as Combinatorial Athletic Outcome Contracts, or CAOCs. Rather than treating the selections as conventional sportsbook legs, the contracts combine the settlement outcomes of at least two underlying event contracts. A successful position requires the specified outcomes to occur together.
The regulatory basis for the product is already in place. Commodity Futures Trading Commission records show that QCEX, the exchange acquired by Polymarket and used for its US operations, certified its CAOC product on May 20. The filing describes each contract as a $1 event contract based on the joint settlement result of two or more underlying contracts.
The timing reflects Polymarket’s increasing dependence on sport as it prepares for one of the busiest periods of the US betting calendar. According to figures cited in industry coverage, sports have represented roughly 99% of volume on its US exchange during 2026, with around $15.5 billion traded.
Polymarket is already displaying dedicated NFL combination markets covering preseason games, including moneyline-style outcomes, point spreads and totals.
The move also puts Polymarket more directly alongside Kalshi, another federally regulated prediction-market exchange that has expanded aggressively into sports contracts and combination products.
Parlays are particularly attractive to betting operators because combining several outcomes produces larger potential payouts while requiring every included selection to succeed. Introducing a comparable structure gives prediction markets another way to compete for sports customers without adopting the conventional sportsbook model.
That expansion is also likely to keep regulatory scrutiny focused on the sector. State gambling authorities have repeatedly challenged sports event contracts on the grounds that they resemble wagering products normally subject to state gambling laws, while prediction-market operators maintain that their contracts fall under federal commodities regulation.
With the NFL regular season approaching, Polymarket’s parlay experiment therefore represents more than another product update. It further narrows the practical gap between federally regulated prediction exchanges and established US sportsbooks.