Prediction market trading tied to the 2026 FIFA World Cup has surpassed US$2 billion across leading platforms, highlighting the sector’s growing influence within the broader sports wagering landscape.
According to data from Polymarket, Kalshi, and market-tracking platform DeFi Rate, combined trading volume crossed the milestone as the tournament’s group stage got underway on June 11.
The surge in activity underscores increasing consumer interest in event-based prediction markets, which continue to gain traction alongside traditional sportsbook betting products.
Polymarket Drives Majority of Trading Volume
Polymarket’s World Cup winner market has emerged as one of the largest prediction contracts ever launched on the platform.
Since opening in July 2025, the market has generated more than US$2 billion in cumulative trading volume. Activity accelerated significantly around the tournament’s opening match, with over US$66 million traded during the 24-hour period surrounding kickoff.
The platform currently holds approximately US$352.7 million in liquidity across World Cup-related markets, providing substantial depth for traders participating throughout the tournament.
Among individual nation contracts, France has attracted the highest trading volume at US$40.9 million, followed by Spain at US$33.6 million.
Kalshi Expands Sports Market Presence
Kalshi, the CFTC-regulated event contract exchange serving the U.S. market, has also recorded strong demand for World Cup-related contracts.
According to company figures, its Men’s World Cup winner market has generated more than US$130 million in trading volume, making it the platform’s third-largest active market.
Only Kalshi’s 2026 NBA Finals market and its 2028 Democratic presidential nominee contract have generated higher trading volumes.
DeFi Rate projects that total World Cup activity on Kalshi could reach between US$1.47 billion and US$1.93 billion by the end of the tournament, depending on the level of U.S. consumer engagement.
Spain Emerges as Market Favorite
Current pricing across both major prediction platforms points to Spain as the leading favorite to win the tournament.
At the time of reporting, Spain carried an implied championship probability of approximately 17%, narrowly ahead of France at 16%.
Portugal ranked third at 11.3%, followed by England at 10.9%, while defending champions Argentina and Brazil were priced at 8.8% and 8.3% respectively.
Kalshi’s market data similarly identifies Spain, France, England, Brazil, and Portugal among the strongest contenders to reach the final stages of the competition.
U.S. Participation Continues to Grow
One of the more notable trends has been the level of interest surrounding tournament co-host United States.
Despite carrying only an implied championship probability of around 3%, the U.S. market has generated approximately US$50.9 million in trading volume on Polymarket.
Analysts suggest the discrepancy reflects strong retail participation and host-nation interest rather than a broad belief in the team’s title chances.
Meanwhile, Robinhood’s affiliated Rothera exchange has added further liquidity to the sector after launching World Cup prediction markets through infrastructure linked to Kalshi.
Prediction Markets Remain Small Relative to Sports Betting
Although prediction market activity continues to expand rapidly, it remains a relatively small segment of the overall World Cup wagering ecosystem.
Industry research firm H2 Gambling Capital estimates that legal sportsbook betting handle on the 2026 World Cup could reach approximately US$60 billion, representing a 71% increase from the US$35 billion wagered during the 2022 tournament in Qatar.
The expanded 48-team format, featuring 104 matches compared to 64 in 2022, is expected to create significantly more betting opportunities throughout the six-week competition.
Regulatory Questions Remain
Despite record growth, the regulatory landscape for prediction markets remains uncertain.
In the United States, the Commodity Futures Trading Commission (CFTC) recently proposed new rules that could affect certain event contract categories. Public consultation on the proposals remains ongoing.
At the state level, regulatory scrutiny has intensified. Massachusetts has moved to restrict Kalshi’s sports-related contracts, Nevada has taken action that resulted in Polymarket withdrawing from the state, and Arizona has reportedly pursued legal action against Kalshi.
Kalshi continues to argue that its event contracts fall under federal financial market regulation rather than gambling legislation, a position that remains subject to ongoing legal and regulatory debate.
Sector Growth Accelerates
The World Cup trading surge reflects broader momentum across the prediction market industry.
According to research cited by ESPN, combined monthly trading volume across Kalshi and Polymarket exceeded US$24 billion in April 2026, more than four times the level recorded eight months earlier.
Sports-related contracts have been a major driver of that expansion, accounting for approximately 80% of Kalshi’s total trading volume since mid-2024.
As World Cup activity continues to build, the tournament is emerging as one of the most significant tests yet for the prediction market sector, offering insight into how these platforms may evolve alongside traditional sports betting products in the years ahead.
