
World Cup Ignites Record Volumes in Prediction Markets
The 2026 FIFA World Cup sparked a dramatic surge in prediction-market activity in June, with Kalshi posting over $31 billion in notional volume and Polymarket surpassing $10.8 billion on its international exchange, while the new platform Rothera traded about $2 billion. U.S. platforms saw substantial volumes (Kalshi >$3.5B, Polymarket >$3.5B) and rising open interest (Kalshi >$1B, Polymarket ~$.4B), underscoring the World Cup as a major test for market integrity and regulatory scrutiny as platforms prepare for continued high-volume periods.













