TLDR
- Kalshi and Polymarket recorded a combined $44.8 billion trading volume in June, marking a 75% increase from May.
- Kalshi led the growth with an 87.4% surge, reaching $31.5 billion in monthly trading volume.
- Polymarket’s global platform generated $10.26 billion, while its U.S. platform reached $3.04 billion.
- FIFA World Cup 2026 significantly boosted activity across prediction markets during June.
- Kalshi’s World Cup winner market attracted over $832 million in bets, with France leading predictions.
Prediction markets posted strong growth in June as global sports activity increased user participation across platforms. Kalshi and Polymarket recorded a sharp rise in combined trading volumes during the period. The surge aligned with increased betting activity tied to the ongoing FIFA World Cup 2026.
Kalshi Leads Surge in Prediction Market Volumes
Kalshi reported the highest growth rate among major platforms during June as activity expanded rapidly. The platform recorded $31.5 billion in monthly volume, marking an 87.4% increase from May levels. This growth pushed Kalshi ahead of competitors in total monthly trading activity.
Meanwhile, Kalshi benefited from strong engagement in sports-based contracts linked to global football events. The FIFA World Cup Winner market alone attracted more than $832 million in bets on Kalshi. About 35% of participants placed wagers predicting France as the tournament winner.
In addition, Kalshi expanded its user base as sports-driven interest increased across regulated prediction platforms. Market activity remained consistent throughout June, supporting sustained volume growth on Kalshi. Analysts linked this trend directly to heightened global sports engagement.
Polymarket Platforms Record Steady Volume Expansion
Polymarket also reported strong gains as its non-U.S. platform attracted $10.26 billion in June volume. This figure reflected a 45% increase compared to the $7.08 billion recorded in May. The platform reversed a previous downward trend seen between March and May.
At the same time, Polymarket US maintained a steady upward trajectory in regulated trading activity. The U.S. platform recorded $3.04 billion in monthly volume, up from $1.77 billion in May. This growth highlighted continued demand within regulated prediction markets.
Moreover, World Cup-related contracts played a key role in driving trading activity across Polymarket platforms. Individual match contracts generated between $500,000 and $2 million in trading volume. These figures confirmed strong user engagement across multiple events.
Legal Scrutiny Intensifies as Volumes Rise
Despite strong growth, Kalshi and Polymarket faced increasing legal challenges across several U.S. states. Authorities in more than a dozen states initiated actions against the platforms over sports-related contracts. Regulators argued that these offerings resembled unlicensed sports betting services.
However, Kalshi and Polymarket maintained that federal oversight permits their operations within existing frameworks. The platforms, alongside the Commodity Futures Trading Commission, supported this position in ongoing discussions. They stated that federal rules override conflicting state-level restrictions.
Meanwhile, Kalshi continued to expand its market offerings while addressing regulatory concerns in parallel. The ongoing FIFA World Cup is scheduled to conclude on July 19, which may sustain activity levels. Market participants expect Kalshi to remain central to prediction market growth trends.
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