Prediction Markets Capture Growing Share of Legal U.S. Sports Betting During 2026 World Cup

Prediction-market trading surged during the 2026 World Cup and accounted for around 27% of all legal U.S. sports-betting volume, an increase from 9% recorded at the start of the year, while traditional sportsbooks experienced slower relative growth throughout the tournament period. This shift occurred as platforms such as Kalshi and Polymarket handled record levels of activity, with Kalshi reporting more daily app users than DraftKings or FanDuel at multiple points during the event. Observers note that the pattern placed additional competitive pressure on established operators including FanDuel and DraftKings as the tournament progressed through July 2026.

Volume Shifts and Market Share Data

Figures released in connection with the tournament show prediction markets expanding their portion of regulated U.S. betting activity from the 9% baseline early in the year to 27% by the time the World Cup reached its later stages. The increase coincided with heightened interest in event-specific contracts that allowed participants to trade on match outcomes, player statistics, and other measurable variables tied directly to World Cup fixtures. Traditional sportsbooks continued to process substantial overall volume, yet their share of new activity grew more slowly than the prediction-market segment during the same weeks.

Analysts tracking daily transaction data found that prediction platforms absorbed a larger fraction of total legal wagers placed on soccer-related events than they had on prior major tournaments. The 27% figure reflects aggregated activity across multiple exchanges and does not include unregulated offshore operations. Those who monitor regulatory filings note that the surge remained confined to licensed entities operating under existing state frameworks.

Platform Performance and User Metrics

Kalshi and Polymarket each recorded peak trading volumes that exceeded previous benchmarks set during earlier sporting events in 2026. Kalshi achieved higher daily active app users than DraftKings or FanDuel on several days while the World Cup matches were underway, according to publicly reported engagement statistics. Polymarket similarly processed elevated contract volumes tied to individual game results and tournament progression, drawing participants who previously used conventional sportsbooks for similar outcomes.

Activity on these platforms included both short-term contracts settled after single matches and longer-term positions linked to overall tournament results. Data collected during the period indicate that many users alternated between prediction-market interfaces and traditional betting apps, yet the net flow of new engagement tilted toward the prediction platforms for the duration of the event. The pattern contributed to the overall reallocation of market share observed across the legal U.S. betting landscape.

Competitive Pressure on Established Operators

Companies operating traditional sportsbooks, including FanDuel and DraftKings, faced measurable effects from the expanded prediction-market activity. Reports compiled during July 2026 show these operators maintaining strong absolute volumes while losing relative ground in the percentage of total legal betting that flowed through their platforms. The shift prompted internal reviews of product offerings and prompted some operators to explore partnerships or feature adjustments aimed at retaining user attention during high-profile soccer events.

Those who follow industry filings observe that the competitive dynamic emerged because prediction markets offered contract structures unavailable on standard sportsbooks, such as continuous trading of outcome probabilities throughout a match. This distinction allowed participants to adjust positions in real time, a capability that appealed to a subset of bettors who had previously remained within conventional platforms. The resulting redistribution of activity occurred without any reported changes to underlying regulatory approvals or state licensing requirements.

Regulatory and Operational Context

All reported prediction-market activity took place on platforms authorized to operate in the relevant U.S. jurisdictions where World Cup-related contracts were offered. State regulators continued to oversee transaction reporting and compliance standards throughout the tournament, and no enforcement actions specific to the volume increase were noted in contemporaneous coverage. The growth remained within the framework established for prediction contracts that settle on verifiable event outcomes rather than traditional point spreads or moneylines.

Industry observers tracking app-store rankings and download metrics recorded the temporary elevation of Kalshi above the established sportsbooks during the tournament window. These rankings reflected daily user engagement rather than total wagering dollars, yet they aligned with the broader percentage share captured by prediction markets across the full legal market. The alignment between user metrics and volume share provided additional confirmation of the trend documented in the July 2026 reporting period.

Conclusion

The 2026 World Cup period produced a documented reallocation of legal U.S. sports-betting activity toward prediction markets, with Kalshi and Polymarket registering record engagement and Kalshi surpassing DraftKings and FanDuel in daily app users on multiple occasions. The share of total volume attributed to prediction platforms rose from 9% to 27% over the course of the year, illustrating a measurable shift while traditional operators retained substantial absolute activity. Data compiled during the tournament window supply the basis for these observations and remain available through the referenced Fortune report covering the same developments.