Kalshi hits record June prediction market volume as World Cup boosts trading
Kalshi recorded a record month for trading volume in June as the 2026 FIFA World Cup drove surging activity in prediction markets. DefiLlama data shows Kalshi posted nearly $9.4B in trading volume in June, up from about $5.3B in May. Polymarket also rose to roughly $4.3B from about $3.5B.
The tournament started June 11 and is the first FIFA World Cup with 48 teams. Reported data from Dune Analytics showed record notional trading volumes on both Kalshi and Polymarket, making the World Cup one of the biggest drivers of prediction market trading in June.
Knockout-stage matches drew especially heavy flows. Canada’s Round of 16 vs Morocco generated over $48M in trading volume on Kalshi and $26.8M on Polymarket. For the United States Round of 16, Kalshi’s “which team will advance” market recorded more than $2.1M in volume, while a comparable Polymarket market attracted around $1.6M.
Regulatory pressure remains a key overhang. In the US, multiple states moved against Kalshi and Polymarket, seeking to halt or reframe event contracts under gambling and tax rules. CFTC Chair Michael Selig criticized such moves as “illegal enforcement actions,” arguing Congress gave the CFTC sole authority over commodity derivatives, including prediction markets.
In June, casino operators, tribal groups, and labor organizations urged Congress to remove sports-event contracts from the CFTC’s authority via an amendment to the CLARITY Act. In Europe, ESMA said regulation depends on product characteristics rather than the “event contract” label.
Neutral
This is fundamentally a trading-activity and liquidity headline for prediction markets, with Kalshi reporting record June volume ($~9.4B) and notable knockout-match spikes. That can attract short-term attention and speculative positioning in related crypto venues, which is typically mildly supportive.
However, the article also highlights ongoing US legal and regulatory uncertainty. States challenging Kalshi and Polymarket, and CFTC Chair Michael Selig’s pushback (“illegal enforcement actions”) suggests a potentially volatile policy path. Similar regulatory back-and-forth in past derivatives-like products often creates periodic risk-off moves, even when usage data is strong.
Net effect: strong demand signals for event-contract trading (short-term bullish impulse), offset by governance/regulatory overhang that can cap follow-through and raise headline risk (neutral overall). In the long run, sustained World Cup-driven participation could normalize flows into prediction market infrastructure, but traders will likely monitor legal outcomes before committing capital beyond the event cycles.