Prediction markets hit $50.6B record in July 2026

Prediction markets hit a record $50.6B in July 2026, led by Kalshi’s $37.7B. Polymarket US surged 54% to $5B, while the main Polymarket fell 26% to $7.9B. The FIFA World Cup drove the surge.

Prediction markets Kalshi, Polymarket, and Polymarket US set a new monthly record in July 2026, reaching a combined trading volume of $50.6 billion—up 7.8% from June’s $46.95 billion. Kalshi led the market with $37.7 billion, a 14% monthly increase, accounting for approximately 74.5% of the total volume. Polymarket US experienced a significant 54% surge to $5 billion, while the main Polymarket platform declined 26% to $7.9 billion, resulting in a combined Polymarket total of $12.9 billion. The surge in trading activity was largely attributed to the FIFA World Cup, which concentrated volume on high-profile event contracts. Despite the record-setting volumes, open interest dropped to $1.2 billion following the tournament’s conclusion. Regulatory challenges continued, with lawsuits and enforcement actions in New York and Minnesota. The data highlights shifting trader activity between platforms and underscores the growing mainstream adoption of event-based trading venues.