Polymarket Test-Launches Parlays in Beta on Regulated U.S. Exchange

Polymarket’s regulated U.S. exchange has begun testing parlay-style trading, with exchange data showing thousands of multi-leg positions placed last week even though the product remains in a limited beta. The self-certified contracts, dubbed “Combinatorial Athletic Outcome Contracts” (CAOCs), bundle two or more individual sports event contracts into a single position that only pays out if every leg hits.

The beta launch caps a slower-than-expected rollout. Polymarket’s U.S. subsidiary, QCX LLC, filed the self-certification with the Commodity Futures Trading Commission back on May 20, telling the regulator it intended to list the contracts no earlier than May 21. Ten weeks later, the product still wasn’t trading on the domestic exchange. Polymarket’s offshore, blockchain-based platform — which blocks U.S. IP addresses and operates outside CFTC oversight — beat its own regulated sibling to market, turning on parlays June 10 to coincide with the start of the FIFA World Cup.

Why the Parlay Push Matters

Multi-leg wagers are the financial engine of the traditional sports betting industry, and prediction markets are chasing that same revenue stream through a different regulatory lane. A CAOC works structurally like a sportsbook parlay: pick multiple outcomes, and if any single leg misses, the whole position resolves to zero. But because pricing happens on an open exchange order book rather than through a bookmaker setting the line, the implied “vig” on a prediction-market combo can run closer to 1-3% compared to the 15-30% built into a typical multi-leg sportsbook parlay.

The CFTC filing also builds in integrity safeguards mirroring what regulated sportsbooks require — athletes, coaches, front-office personnel, team ownership, and their immediate family members are barred from trading the contracts, and users must clear age verification before combining legs into a single ticket.

Kalshi’s Head Start Widens the Gap

The lag between certification and launch mattered competitively. While Polymarket’s regulated exchange sat on the sidelines, rival Kalshi’s parlay-style “combo” volume exploded, climbing from $4.77 billion in May to $13.78 billion in July, according to exchange trade data. Kalshi has controlled roughly 80-90% of notional trading volume among CFTC-approved prediction market exchanges for most of 2026, and sports contracts — boosted heavily by combo bets during the World Cup — have become the biggest driver of that growth.

Industry analysts have pointed to Polymarket’s missing parlay product as a specific drag on its reported volume figures relative to Kalshi, since notional volume accounting rewards platforms that offer combo bets. A full rollout of custom parlays on Polymarket’s U.S. exchange is expected to help close some of that gap, though this week’s beta test — still capped in scope — suggests the company is moving cautiously rather than flipping the feature on all at once.

What Comes Next

Polymarket has not detailed a timeline for moving CAOCs out of beta and into full public release, and the CFTC filing leaves open whether the eventual product will lean on a custom combo builder, curated pre-built parlays, or both. For now, the beta gives U.S. users a first look at how exchange-priced multi-leg contracts compare to the parlays long offered at traditional sportsbooks, at a moment when prediction markets are increasingly competing directly for the same bettors.