A $50 billion industry is caught in a constitutional crossfire. In February 2026, the U.S. Commodity Futures Trading Commission filed an extraordinary amicus brief in the Ninth Circuit Court of Appeals, asserting "exclusive jurisdiction" over prediction markets — and threatening state attorneys g...
"The CFTC will no longer sit idly by while overzealous state governments undermine the agency's exclusive jurisdiction over these markets by seeking to establish statewide prohibitions on these exciting products." — Michael Selig, Chairman, U.S. Commodity Futures Trading Commission
A $50 billion industry is caught in a constitutional crossfire. In February 2026, the U.S. Commodity Futures Trading Commission filed an extraordinary amicus brief in the Ninth Circuit Court of Appeals, asserting "exclusive jurisdiction" over prediction markets — and threatening state attorneys general with litigation if they interfere. In a video statement, Chairman Michael Selig warned: "To those who seek to challenge our authority in this space, let me be clear: We will see you in court."
The stakes are enormous. Polymarket and Kalshi, which together capture 85–90% of global prediction market volume, processed roughly $44 billion in notional trading volume in 2025. Kalshi alone hit $1 billion in Super Bowl Sunday trading volume in February 2026 — a 2,700% year-over-year increase. Polymarket reached 679,000 monthly active addresses in February, a new all-time high. Yet these platforms simultaneously face enforcement actions from more than two dozen state attorneys general who classify event contracts as illegal gambling.
This is not merely a regulatory turf war. It is a test case for how the United States will regulate crypto-native financial products — and whether federalism or federal preemption wins. The outcome will determine whether prediction markets become a regulated $100 billion asset class or fragment into a jurisdictional patchwork that stifles the industry entirely.
The numbers tell a story of unprecedented growth. In 2024, global prediction market volume was under $5 billion. By the end of 2025, that figure had ballooned to approximately $44 billion — a tenfold expansion driven by the 2024 U.S. presidential election cycle and the subsequent legalization of event contracts through court rulings and CFTC designations.
Two platforms dominate:
Polymarket recorded $21.5 billion in 2025 trading volume, with $3.6 billion in monthly volume as of February 2026. Its monthly active addresses hit a record 679,000 in mid-February. The platform relaunched in the U.S. in December 2025 under "Polymarket USA" after acquiring QCEX, a CFTC-designated contract market, in November 2025.
Kalshi processed $17.1 billion in 2025 volume and is now on an annualized revenue pace of $600–700 million. The company raised $1 billion at an $11 billion valuation in its November 2025 Series E, led by Sequoia and CapitalG. Kalshi's sports-adjacent contracts alone generate an estimated $1.3 billion in annualized revenue — roughly 20% of DraftKings' projected 2026 revenue.
Combined weekly volumes now routinely exceed $1 billion, with peaks during major events (Super Bowl, March Madness, geopolitical crises) driving multi-billion-dollar trading windows. The sector's annualized run rate entering 2026 is approximately $50 billion.
The Trump administration's CFTC has taken an aggressively pro-prediction-market stance that represents a 180-degree reversal from the previous administration's posture.
On January 29, 2026, at the joint SEC-CFTC "Project Crypto" summit, Chairman Selig announced a four-part regulatory agenda: withdraw the prior administration's proposed ban on political event contracts, issue new permissive rulemaking, defend the CFTC's exclusive jurisdiction in court, and streamline the self-certification process for new contracts.
The most consequential action came on February 17, 2026, when the CFTC filed an amicus brief in the Ninth Circuit — in a case brought by Nevada against Kalshi — asserting that the Commodity Exchange Act (CEA) gives the federal government exclusive jurisdiction over event contracts. The brief argued that prediction market contracts are "swaps" under federal derivatives law, and that states cannot regulate, restrict, or prohibit them under gambling statutes.
This is not a theoretical position. The CFTC explicitly withdrew a 2024 proposed rule that would have restricted certain event contracts, signaling that the current commission views prediction markets as legitimate financial instruments deserving federal protection.
The states are not backing down. More than two dozen state attorneys general have filed legal actions against prediction market platforms, with active enforcement proceedings in Nevada, Massachusetts, Tennessee, Maryland, Utah, and others.
The Massachusetts case is particularly significant. On February 9, 2026, Polymarket filed a preemptive federal lawsuit against Massachusetts Attorney General Andrea Joy Campbell and the Massachusetts Gaming Commission, seeking injunctive relief to prevent enforcement of state gambling laws against its platform. The filing came weeks after a Massachusetts judge denied competitor Kalshi's emergency motion to stay a preliminary injunction, effectively ordering Kalshi to block Massachusetts users from accessing sports-related contracts within 30 days.
Former New Jersey Governor Chris Christie, appearing on CNBC on February 20, 2026, argued that "Polymarket and Kalshi are violating laws in all 50 states" — a position shared by state gambling regulators who view event contracts as thinly disguised sports betting.
The state argument has legal force. In multiple rulings, courts have rejected what they call the "overly broad" claim that CFTC oversight preempts all state gambling regulation. Several courts have found that federal commodities regulation can coexist with states' traditional authority to regulate gambling — a concurrent-jurisdiction theory that directly contradicts the CFTC's field-preemption argument.
The legal question at the heart of this dispute is constitutional: Does the Commodity Exchange Act preempt the entire field of event contract regulation, or does it merely prevent states from imposing rules that directly conflict with federal derivatives law?
Field preemption — the CFTC's position — would eliminate state authority entirely. If Congress preempted the field when it gave the CFTC "exclusive jurisdiction" over futures and swaps, then there is no room for states or tribal authorities to regulate event contracts, regardless of whether those contracts look like gambling.
Conflict preemption — the states' fallback position — would allow state gambling laws to coexist with federal derivatives regulation, provided state rules don't directly contradict the CEA. Under this theory, a state could ban sports-related event contracts as gambling while leaving political and economic contracts untouched.
The circuit courts are now split. The Ninth Circuit (Nevada v. Kalshi) and First Circuit (Massachusetts cases) are expected to issue conflicting rulings, virtually guaranteeing Supreme Court review within the next 18–24 months.
This mirrors other crypto-regulatory battles — the SEC vs. CFTC jurisdiction war over digital assets, the state-by-state money transmitter licensing patchwork — but with a crucial difference: prediction markets generate enough revenue to fund sustained Supreme Court litigation. Kalshi's $11 billion valuation and Sequoia backing ensure this fight will be prosecuted to its conclusion.
From an economic value perspective, prediction markets present a fascinating case study in sustainable crypto-adjacent revenue.
Unlike most crypto protocols — where 85–90% of economic activity is subsidy-driven through token inflation, airdrops, and venture capital injections — prediction markets generate genuine fee revenue from real user demand. Kalshi's $600–700 million annualized net revenue comes from transaction fees on billions in trading volume, not from token issuance or inflationary mechanisms.
Polymarket operates on Polygon, settling contracts in USDC and collecting fees on resolution. Its CFTC-designated U.S. entity operates under regulated clearinghouse requirements. The platform's 679,000 monthly active addresses represent real economic actors making real financial decisions — not bots farming airdrops or MEV searchers extracting value.
However, the economic model faces structural risks:
Regulatory fragmentation costs: Operating across 50 states with varying compliance requirements could consume 15–25% of revenue, eroding the margin advantage over traditional sportsbooks.
Liquidity concentration: 85–90% of volume in two platforms creates systemic risk. A single adverse court ruling could vaporize billions in open interest overnight.
Event dependency: Volumes spike 3–5x during major events (elections, Super Bowls) but normalize between them. The industry's $50 billion annualized run rate may overstate sustainable demand.
Settlement infrastructure: Polymarket's Polygon-based settlement introduces smart contract risk, oracle dependency, and bridge exposure — the same infrastructure vulnerabilities that cost crypto $2.1 billion in hacks during 2025.
Prediction markets sit at a critical intersection of crypto infrastructure and traditional finance.
Polymarket's on-chain architecture — USDC settlement on Polygon, automated market makers, and smart contract resolution — represents one of the few crypto use cases generating sustained, non-speculative transaction volume. The platform's $3.6 billion monthly volume flows through crypto rails, generating real demand for stablecoin liquidity and layer-2 block space.
Kalshi, by contrast, operates entirely on traditional financial infrastructure, with fiat settlement and CFTC-regulated clearing. Yet its $11 billion valuation reflects crypto-venture economics — Sequoia, CapitalG, and other crypto-adjacent investors are betting on prediction markets as the next breakout crypto-native financial primitive.
The regulatory outcome will determine which model wins. If the CFTC prevails and prediction markets are classified as regulated derivatives, the crypto-native model (Polymarket) must compete on compliance with the TradFi model (Kalshi). If states prevail and event contracts require state-by-state gambling licenses, both platforms face the same 50-state licensing burden that has constrained DraftKings and FanDuel.
The legal timeline is accelerating:
Legal analysts note that the case has elements that attract Supreme Court attention: a clear circuit split, billions of dollars at stake, fundamental federalism questions, and a federal agency actively litigating against state governments. The intersection of derivatives regulation, gambling law, and emerging technology makes this one of the most significant financial regulatory cases since the SEC's battles over crypto asset classification.
$50 billion annual market is caught between federal derivatives law and state gambling statutes, with 50+ active legal proceedings across the country.
The CFTC under Chairman Selig has made an unprecedented power grab, asserting exclusive jurisdiction over prediction markets and openly threatening state attorneys general with litigation.
Polymarket (679K monthly active addresses) and Kalshi ($11B valuation) control 85–90% of the market, giving the industry the financial resources to litigate through the Supreme Court.
From an economic value standpoint, prediction markets are one of crypto's rare sustainable revenue models — Kalshi generates $600–700M in annualized net revenue from real transaction fees, not token inflation.
The regulatory outcome will determine crypto's role: if the CFTC wins, prediction markets validate crypto rails for regulated financial products. If states win, the industry faces a DraftKings-style 50-state licensing gauntlet.
Supreme Court review is likely within 18–24 months, making this the most consequential financial regulation case since the SEC's crypto enforcement campaigns.
The prediction market jurisdictional war is a proxy fight for a much larger question: who regulates crypto-native financial products in the United States? The CFTC's aggressive assertion of exclusive jurisdiction — backed by the Trump administration — represents the most explicit federal endorsement of a crypto-adjacent market structure to date. But more than two dozen states, armed with centuries of gambling regulation precedent, are not conceding.
For investors and builders, the signal is clear: prediction markets have achieved product-market fit. The $50 billion in annualized volume, 679,000 monthly active users, and $11 billion private valuations are not speculation — they are evidence of genuine demand for event-driven financial products. The question is no longer whether prediction markets will exist, but under whose rules they will operate.
The answer will likely come from the Supreme Court. And when it does, it will set precedent not just for Polymarket and Kalshi, but for every crypto-native financial product seeking to operate in the United States.