Prediction markets processed $44.8 billion in combined trading volume in June 2026, a 75% increase from May's $25.66 billion, driven primarily by the FIFA World Cup that began June 11. Kalshi accounted for $31.5 billion of that total, an 87.4% month-over-month gain; Polymarket's international exc...
"We've gone from less than five billion dollars a month to forty-five billion in nine months. This is what happens when you give people real price discovery on real events." — Tarek Mansour, CEO, Kalshi (CNBC, July 4, 2026)
Prediction markets processed $44.8 billion in combined trading volume in June 2026, a 75% increase from May's $25.66 billion, driven primarily by the FIFA World Cup that began June 11. Kalshi accounted for $31.5 billion of that total, an 87.4% month-over-month gain; Polymarket's international exchange contributed $10.8 billion, a record; its U.S. platform added $3.5 billion; Rothera, a newer entrant, posted $2 billion. The sector's monthly volume now exceeds the $14 billion average monthly handle of all U.S. legal sportsbooks in 2025, according to Pew Research Center analysis.
The volume surge arrives amid a three-front regulatory war. The CFTC published its most comprehensive event-contract rulemaking on June 10, with comments open through July 27. Minnesota became the first state to criminalize prediction-market operations, triggering federal lawsuits from the CFTC, Kalshi, and Polymarket. And the capital markets are repricing the sector: Kalshi is in talks to raise at a $40 billion valuation, nearly doubling its $22 billion Series F from May, while Polymarket's annualized revenue crossed $1 billion just six weeks after launching U.S. trading fees. Meta is developing "Arena," a standalone prediction-market app, and Robinhood has traded 9 billion contracts in its first year offering the product. The prediction-market sector has shifted from a crypto-native experiment to a contested financial infrastructure layer.
Combined monthly trading volume on prediction-market platforms grew from less than $5 billion in September 2025 to $24 billion in April 2026, according to Pew Research Center's analysis of data from The Block. By June, the figure nearly doubled again to $44.8 billion, per The Block's tracking of Kalshi, Polymarket, and Polymarket US.
The market structure has consolidated around two dominant platforms with distinct regulatory postures:
| Platform | June 2026 Volume | Domicile | Regulatory Status | |---|---|---|---| | Kalshi | $31.5B | U.S. (CFTC-regulated DCM) | Fully licensed | | Polymarket (International) | $10.8B | Offshore | Claims to block U.S. users | | Polymarket US | $3.5B | U.S. | Registered exchange | | Rothera | $2.0B | U.S. | CFTC-registered |
Kalshi now commands roughly 70% of combined volume, a position reinforced by its first-mover advantage in CFTC registration and its aggressive expansion into sports-event contracts. In April 2026, $11.5 billion of Kalshi's $15 billion monthly volume came from sports contracts, per Pew Research Center data. Polymarket's volume skews toward politics, crypto, and world events, though its sports markets have grown since fee introduction.
Total prediction-market volume has surpassed the $14 billion monthly average across all U.S. legal sportsbooks in 2025. The comparison is imperfect — prediction-market volume counts both sides of every trade and includes non-sports categories — but the scale crossover is structurally significant. Prediction markets are no longer a niche segment within crypto; they are a parallel financial infrastructure competing with traditional derivatives exchanges.
The FIFA World Cup, which began June 11 in the United States, Canada, and Mexico, has functioned as a mass-market stress test for prediction-market infrastructure. Kalshi has processed over $1 billion in daily volume consistently since the tournament began. Its "World Cup Winner" market alone has attracted more than $832 million in notional trades, with approximately 35% of participants selecting France.
Polymarket's flagship "World Cup Winner" contract generated $3.9 billion in trading volume — exceeding its 2024 U.S. presidential election contract, which had previously been the largest single prediction-market contract in history. Across all prediction-market venues, World Cup-related contracts surpassed $3.9 billion in cumulative volume by July 5, according to TechTimes.
Macquarie estimated total global World Cup betting could exceed $50 billion in 2026, a 43% increase over 2022. Prediction markets captured a meaningful share. The tournament demonstrated that event-contract platforms can absorb high-frequency retail flow on par with traditional sportsbooks, while offering a product that settles on-chain (in Polymarket's case) or through CFTC-regulated clearing (in Kalshi's case).
The World Cup also exposed capacity limits. Polymarket's daily spot volume hit a record $818 million during a single session when World Cup and SpaceX IPO contracts overlapped, according to Cryptopolitan reporting. Whether these platforms can sustain post-tournament engagement is an open question. The 2024 U.S. election cycle produced a similar volume spike followed by a multi-month decline — Polymarket's volume fell in both April and May 2026 before the World Cup reversed the trend.
On June 10, the CFTC published a Notice of Proposed Rulemaking (RIN 3038-AF65) titled "Prediction Markets; Public Interest Determinations," proposing amendments to 17 C.F.R., Part 40 (Rule 40.11). The rule establishes a three-step sequential analysis for event contracts:
The comment period runs through July 27, 2026. The Commission received approximately 3,500 comments on its earlier Advance Notice of Proposed Rulemaking from March. According to Ropes & Gray analysis, if adopted, the amended rule would represent the most comprehensive federal regulatory framework for prediction markets to date.
The rulemaking is a direct consequence of the CFTC's shift under Chair Michael Selig, who announced in January 2026 that the agency would advance prediction-market regulation. The prior CFTC leadership had opposed sports-event contracts; the current framework seeks to permit them while maintaining authority over contracts that touch enumerated prohibited activities.
For the prediction-market industry, the rulemaking carries high stakes. A permissive final rule would cement the CFTC's jurisdiction and provide legal cover for platforms listing contracts on sports, elections, and economic events. A restrictive interpretation of "gaming" or "similar activity" could force platforms to delist their highest-volume contract categories.
On May 18, Governor Tim Walz signed SF4760, making Minnesota the first state to criminalize the operation, hosting, or advertising of prediction markets. The law, set to take effect August 1, makes offering prediction markets in the state a felony.
The response was immediate and coordinated. The CFTC sued Minnesota within 24 hours, asserting federal preemption under the Commodity Exchange Act. Kalshi filed its own federal lawsuit on May 29, arguing Minnesota violated the Supremacy Clause by infringing on the CFTC's "exclusive jurisdiction" over event contracts. Polymarket followed with a separate suit on June 4. Both platforms also raised First Amendment claims targeting the law's advertising prohibition.
On July 2, U.S. District Judge Katherine Menendez heard oral arguments from all three plaintiffs seeking preliminary injunctions. The ruling is pending. According to Star Tribune reporting, the judge pressed attorneys for clarity on how to distinguish between an "illegal bet" and a "bona fide event contract with financial or economic consequences."
The Minnesota case is the first direct test of whether states can override CFTC jurisdiction over event contracts. The outcome will set precedent for other states — Forbes reported that prediction markets have become a legislative target as their volume has grown, with the headline framing: "$24 billion a month. States are fighting back." If the court upholds federal preemption, it would effectively eliminate state-level prohibition as a regulatory tool. If Minnesota prevails, it opens the door to a patchwork of state bans that could fragment market access.
Private capital is flowing into the sector at an accelerating rate. Kalshi's valuation trajectory: $5 billion in early 2025, $11 billion by December 2025, $22 billion in May 2026 (Series F, $1 billion raised from Coatue, Sequoia, a16z, Morgan Stanley), and now in talks for $40 billion in a round that could close in Q3 2026, per Financial Times reporting via CoinDesk. CEO Tarek Mansour has stated an IPO would not occur before 2027.
Polymarket is seeking funding at a $15 billion valuation, less than half Kalshi's target. The gap reflects Kalshi's regulatory advantage as a CFTC-registered Designated Contract Market and its dominance in U.S. sports-event volume. However, Polymarket retains a significant lead in international volume and crypto-native distribution.
The combined implied valuation of the top two platforms — $55 billion — exceeds the market capitalization of established U.S. exchanges such as ICE (Intercontinental Exchange) subsidiary NYSE, and approaches CME Group's valuation territory. Whether these valuations are sustainable depends on the sector's ability to retain post-World Cup volume and navigate the regulatory environment.
Polymarket operated without trading fees through 2025, prioritizing volume and liquidity over revenue. The platform began rolling out taker fees in January 2026 across crypto markets, followed by sports markets in February and a broader schedule in March. By June, Polymarket's annualized revenue surpassed $1 billion, per CNBC, just six weeks after lifting the waitlist for its U.S. exchange.
The fee structure is probability-based rather than flat: takers pay a maximum of $0.75 per 100 shares on sports, $1.00 on politics and finance, $1.25 on economics and culture, and $1.80 on crypto markets. Geopolitical and world events markets remain fee-free. Daily revenue generation runs $800,000 to $1 million under the current structure, according to Phemex News.
Kalshi, as a CFTC-regulated exchange with clearing infrastructure, monetizes through a combination of exchange fees, clearing fees, and data services. The company does not publicly disclose revenue figures, but its volume trajectory — $31.5 billion in a single month — implies substantial fee revenue even at thin per-contract margins.
Rothera, a newer U.S. entrant, captured $2 billion in June volume (7% of total U.S. prediction-market volume), signaling that the market is not a two-player duopoly despite Kalshi's dominance.
The prediction-market distribution landscape is fragmenting across three channels:
Crypto wallets. Phantom integrated Kalshi-powered prediction markets in December 2025, reaching 20 million wallet users. On June 1, 2026, Phantom switched infrastructure from Kalshi to World, a noncustodial protocol routing orders to liquidity providers on Solana. The shift signals that wallet-native distribution may favor on-chain settlement over centralized exchange integration.
Traditional brokerages. Robinhood launched prediction markets and has traded 9 billion contracts with over 1 million customers in the product's first year — its fastest-growing product line by revenue. Robinhood is building a dedicated futures and derivatives exchange through a joint venture with Susquehanna, which acquired MIAXdx in January 2026. Wealthsimple received Canadian regulatory approval and launched Wealthsimple Predict, a standalone app offering approximately 4,000 Kalshi-powered event contracts across climate, financial markets, and economic indicators.
Big tech. Meta is developing "Arena," a standalone prediction-market app using play money with potential real-money features, per TechCrunch and NPR reporting from June 2026. The app uses Meta's Llama model to auto-generate questions from trending topics and deliver personalized market recommendations. NPR reported that Meta previously explored acquiring Kalshi but talks did not advance. Meta's prior attempt — "Forecast," launched in 2020 and shut down in 2022 — failed to gain traction.
The entry of Meta and Robinhood transforms the competitive landscape. Kalshi and Polymarket built the category; they now face the prospect of competing against platforms with hundreds of millions of existing users.
Regulatory fragmentation. The Minnesota case could produce a split between federal and state authority. Even a CFTC victory would not prevent other states from testing alternative regulatory theories. The CFTC rulemaking itself carries downside risk: an overly restrictive definition of "gaming" could constrain the sports contracts that currently drive the majority of volume.
Volume concentration. Sports events — particularly time-bound tournaments like the World Cup — dominate trading activity. Post-tournament volume declines are historically steep. The 2024 election produced a similar spike-and-decline pattern. Structural sustainability requires diversification into economic, climate, and corporate-event contracts.
Valuation discipline. A combined $55 billion in implied private valuations for Kalshi and Polymarket requires sustained volume growth and margin expansion. If post-World Cup volume reverts to pre-tournament levels ($24-25 billion monthly), the revenue base supporting these valuations narrows considerably.
Settlement risk. Polymarket's on-chain settlement on Polygon introduces smart-contract risk and oracle dependency. Kalshi's centralized clearing eliminates those risks but introduces counterparty concentration. Neither model has been tested at sustained $1 billion+ daily volumes over extended periods.
The prediction-market sector has transitioned from a crypto sideshow to a financial infrastructure category with volume rivaling established exchange verticals. The $44.8 billion June volume figure is a product of specific catalysts — the World Cup, regulatory clarity from the CFTC, and aggressive platform expansion — rather than organic steady-state demand. Whether the sector retains this scale depends on three factors: the CFTC's final rule, the Minnesota court's preemption ruling, and the industry's ability to diversify beyond event-driven volume spikes. The entry of Meta, Robinhood, and institutional-grade clearing infrastructure suggests the market's structural trajectory points toward permanence, but the regulatory perimeter remains undefined. What is clear: prediction markets are no longer asking for permission to exist. They are asking who gets to regulate them, and at what price.