Kalshi's U.S. monthly notional trading volume reaches $40 billion, up approximately 4,500% year-over-year

Odaily News: Prediction market platform Kalshi recorded 15.4 million U.S. visits in July, up approximately 1,520% from fewer than 1 million visits in August 2025; U.S. visits accounted for nearly 80% of its total traffic, higher than the 72.8% recorded during the same period.

Kalshi's August monthly notional trading volume reached approximately $40 billion, up roughly 4,500% from $874 million in the same period last year. During the same timeframe, the prediction market industry's monthly notional trading volume rose from approximately $2 billion to $50.7 billion, with Kalshi accounting for nearly 79% of the latest total.

Sports contracts accounted for 83% of Kalshi's July trading volume. Whether Kalshi's sports contracts fall under federal regulation or state gambling laws is subject to legal dispute, and New Jersey has brought the matter before the U.S. Supreme Court.

Canada recorded approximately 450,000 visits in July, and the U.K. around 296,000 visits, both higher than the roughly 50,000 and 31,000 visits in August 2025, respectively. Users in both regions are currently prohibited from directly accessing or trading on Kalshi under its membership agreement. Kalshi has partnered with Canadian financial services firm Wealthsimple to offer nearly 4,000 eligible contracts through a standalone application. (Cointelegraph)