Prediction Markets Handled 10x More Than US Bookmakers During the World Cup — and a Third Exchange Just Entered the Race
Prediction market platforms combined for over $50 billion in trading volume in June 2026 as the FIFA World Cup drove the sector's most active month on record — roughly ten times the volume projected for US legal sportsbooks across the entire 104-match tournament. ADI Predictstreet, the FIFA official prediction market partner, co-branded with Kalshi in stadiums and on Fox Sports. Rothera, the Robinhood and Susquehanna joint venture, processed $2 billion in its debut month.
Prediction market platforms combined for over $50 billion in trading volume in June 2026, the most active month in the sector's history. Kalshi posted $31 billion in total notional volume — a 70% jump over May — with sports contracts accounting for roughly 85% of activity. Polymarket's international exchange recorded $10.8 billion, while its regulated US platform added $3.5 billion. Rothera, the new exchange operated by Robinhood and Susquehanna, added $2 billion in its debut month. US legal sportsbooks are projected to handle $2.8 to $4.3 billion across all 104 World Cup matches combined. Prediction markets processed approximately ten times that figure.
ADI Predictstreet is the FIFA-designated official prediction market partner of the 2026 World Cup and holds regulatory approval to operate in both the US and Gibraltar. Under a co-branding deal announced in late June, Kalshi's logo appeared alongside ADI's in stadium signage, Fox Sports broadcasts, and ADI's digital tournament hub during the knockout rounds — the first time a US prediction market platform has had mass-market sports-media distribution at an event of this scale. For UK readers, this is the clearest signal yet that prediction markets have crossed into the mainstream commercial sports sponsorship category that traditional bookmakers inhabit.
For UK customers, the headline figures are informative but not directly applicable: neither Kalshi nor Polymarket holds a Gambling Commission licence or FCA authorisation for UK retail operation, so the $50 billion figure represents activity that UK traders cannot participate in through the primary platforms. What the tournament data shows is the scale of the market developing without UK participation. The combined monthly volume of prediction markets now exceeds the annual handle of many regulated European sports-betting markets. If the UK regulatory pathway opens — through Gibraltar's new framework or a future FCA-led regime — the addressable market is already proven at significant scale.
Rothera's $2 billion debut marks the first meaningful competitive challenge to Kalshi's exchange dominance from within the US regulated market. Robinhood built Rothera through a joint venture with Susquehanna (45%/45%, with 10% to MIAX), closing in January 2026 and launching publicly for the World Cup. Robinhood's CFO has said the company expects most of its prediction-market volume to migrate to Rothera over time. For Kalshi, the World Cup delivered a record-breaking month while revealing that its largest retail distribution partner is building the infrastructure to capture that flow in-house. The $50 billion combined figure is the sector's highest watermark; the competitive dynamics behind it are more complicated than the headline suggests.
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