Polymarket US launches parlay trading to compete with Kalshi

Polymarket US has expanded its platform by launching parlay-style trading, referred to as Combinatoric Athletic Outcome Contracts (CAOCs). This feature allows users to combine multiple sporting outcomes into a single position. Following its public rollout, the volume for these multi-leg combos surged, accounting for over 20% of Polymarket US trading volume, reaching approximately $31.4 million in a single 24-hour period.

The launch intensifies competition between Polymarket and Kalshi, as both platforms vie for dominance in the multi-leg prediction market sector. Additionally, a new mobile-native platform, Swipe1, has announced its entry into the ecosystem, focusing on a social, swipe-based user experience designed to lower the barrier to entry for everyday users.

Various promotional offers are currently active for Polymarket users, including referral bonuses for new accounts that provide additional trading funds upon qualifying deposits.