According to ChainCatcher citing Predicted, prediction markets recorded $194.1 billion in notional trading volume in Q3 2026, up 75% from Q2. U.S.-regulated exchanges accounted for 89% of volume, compared with 69% in Q2. Parlays made up 44% of U.S. volume, exceeding the 39% share for single-game sports bets.
American Spend data showed that 11 U.S. states where sports betting is not yet legal, home to about one-third of U.S. adults, contributed 55% of Kalshi’s debit-card deposits in September 2026. Users aged 18 to 24 accounted for 30% of Kalshi’s debit-card deposits. Kalshi and Polymarket US together represented 11% of debit-card deposits to the betting apps, up from 3% in Q1. Blask data showed Kalshi’s share of U.S. prediction-market search demand rose from 23% to 34%.