Key Highlights
- Trading volume across Kalshi, Polymarket, and Polymarket US reached $44.8 billion in June, representing a 75% surge from the previous month
- Kalshi dominated the market with 87.4% month-over-month expansion, totaling $31.5 billion in volume
- Polymarket’s international platform increased 45% to $10.26 billion, while its U.S. division generated $3.04 billion
- FIFA World Cup 2026, which launched on June 11, served as the primary catalyst for the dramatic volume increase
- More than $832 million wagered on Kalshi’s World Cup championship market, with France leading at 35% probability
The prediction market sector experienced its most significant monthly performance in June, with platforms Kalshi and Polymarket benefiting enormously from the FIFA World Cup 2026 tournament.
The Block’s analytics reveal that the trio of platforms—Kalshi, Polymarket, and Polymarket US—collectively processed $44.8 billion in transactions throughout June. This figure represents a substantial 75% escalation compared to May’s $25.66 billion.
These statistics underscore the expanding public appetite for prediction markets, platforms where participants wager actual currency on event outcomes spanning political contests, sporting competitions, and beyond.
Kalshi Dominates Market Growth
Kalshi emerged as the standout performer among the trio. The platform’s monthly transaction volume surged from $16.81 billion in May to $31.5 billion in June—an impressive 87.4% monthly expansion.
This performance positions Kalshi as the industry leader by volume, commanding over two-thirds of the aggregate total across all three platforms.
Polymarket’s global platform, serving users outside American borders, generated $10.26 billion throughout June. This represents a 45% climb from May’s $7.08 billion figure.
The international Polymarket platform had experienced consecutive monthly declines from March through May. June’s performance signals a significant turnaround in that trajectory.
Polymarket US, the company’s compliant American platform, achieved $3.04 billion in June volume, marking a substantial increase from the previous month’s $1.77 billion.
FIFA Tournament Powers Volume Spike
The FIFA World Cup 2026 tournament commenced on June 11 and has unquestionably fueled trading activity across these prediction market platforms.
Kalshi’s dedicated World Cup championship prediction market has accumulated over $832 million in total wagers. Approximately 35% of that capital backs France as the eventual tournament winner.
On Polymarket, contracts for individual match outcomes have consistently generated between $500,000 and $2 million in trading volume per game.
With the World Cup tournament extending through July 19, analysts expect elevated trading volumes to persist for several additional weeks.
These robust figures emerge as prediction market operators face an increasingly complex regulatory environment throughout the United States.
Over a dozen state regulatory bodies have initiated legal proceedings targeting both Kalshi and Polymarket. These states claim the platforms are providing unauthorized sports wagering or gambling services to their residents.
Both companies, supported by the Commodity Futures Trading Commission’s interpretation, maintain that federal regulatory authority permits them to facilitate sports-related prediction markets without obtaining individual state licenses.
This regulatory battle continues to unfold, though it has not dampened trading activity in the near term.
June’s combined transaction volume establishes a new monthly record for these platforms, with the World Cup tournament still several weeks from reaching its finale.
Get 3 Free Stock Ebooks
Discover top-performing stocks in AI, Crypto, and Technology with expert analysis.
- Top 10 AI Stocks - Leading AI companies
- Top 10 Crypto Stocks - Blockchain leaders
- Top 10 Tech Stocks - Tech giants
