New York Attorney General Letitia James and Governor Kathy Hochul sued QCX LLC d/b/a Polymarket U.S. on September 24, 2026, alleging the CFTC-regulated prediction market operates as an unlicensed gambling business under state law. Polymarket countersued hours later, seeking federal jurisdiction a...
"We'll fight for our users. Polymarket was founded in a tiny NYC apartment and now has more than 350 employees here, embodying why people and businesses come here to make it. We believe in New York and we're staying here." — Neal Kumar, Chief Legal Officer, Polymarket
New York Attorney General Letitia James and Governor Kathy Hochul sued QCX LLC d/b/a Polymarket U.S. on September 24, 2026, alleging the CFTC-regulated prediction market operates as an unlicensed gambling business under state law. Polymarket countersued hours later, seeking federal jurisdiction and arguing the Commodity Exchange Act (CEA) preempts state gambling statutes for federally licensed designated contract markets (DCMs).
The lawsuit lands in the middle of a constitutional collision that now involves six state enforcement actions, a coalition letter from 44 state attorneys general, three unprecedented uses of CFTC emergency authority, a confirmed circuit split between the Third and Ninth Circuits, and a pending petition for Supreme Court review. At stake: regulatory control over a sector whose combined monthly trading volume crossed $53 billion in July 2026, according to Pew Research Center.
The economic question is straightforward. If prediction markets are gambling, operators owe state licensing fees and tax revenue. If they are federally regulated derivatives, the CFTC holds exclusive oversight and states lose both revenue and enforcement power. The answer will reshape how economic value flows through event-based financial products — and who captures it.
New York's complaint, filed September 24 in state court in Manhattan, makes three core claims: (1) Polymarket operates as a gambling business without a New York State Gaming Commission license; (2) the platform has avoided state taxes that licensed casinos and mobile sports betting platforms remit; and (3) Polymarket exposes New Yorkers, including users under the legal gambling age of 21, to financial risk without state consumer protections.
The state seeks injunctive relief ordering Polymarket to cease operations as an unlicensed gambling business in New York, forfeiture of all profits deemed illegal, restitution to users, and financial penalties equal to three times its illegal gains.
"By skirting New York's laws, Polymarket is targeting the most vulnerable and depriving New York families of critical services and support," James said in a statement accompanying the filing.
Hours later, Polymarket filed two responsive actions. First, it moved to transfer the state case to the U.S. District Court for the Southern District of New York, seeking federal jurisdiction. Second, it filed a separate civil suit against James and New York State Gaming Commission officials, arguing the state action is "an extraordinary assertion of state power squarely foreclosed by federal law."
Polymarket U.S. holds a Designated Contract Market license from the CFTC — the same federal classification used by major U.S. futures exchanges such as the CME Group. The company returned to the U.S. market in December 2025 following CFTC approval to operate an intermediated trading platform subject to the full requirements of federally regulated exchanges, including segregated customer funds and regular audits.
This is the second prediction market lawsuit New York has filed in two months. In late July 2026, the state sued Kalshi on substantially identical grounds.
The legal fight is occurring against a backdrop of rapid volume growth.
According to a Pew Research Center analysis published September 23, 2026, combined monthly global trading volume on Kalshi and Polymarket more than doubled from $26 billion in May to $53 billion in July, driven primarily by sports contracts coinciding with the FIFA World Cup. Sports trading topped $58 billion on Kalshi and neared $22 billion on Polymarket during June and July alone.
Full-year 2026 volumes are estimated to reach $240 billion, up 370% from 2025's $44 billion total, according to Bernstein. Polymarket hit $25.7 billion in monthly volume in March 2026 and has generated approximately $117.85 million in 2026 revenue, according to The Merkle, dominating on-chain prediction market earnings.
Kalshi now accounts for roughly 82% of monthly turnover across both platforms, fueled by sports contracts that represent 87% of its $39.7 billion in trailing-twelve-month volume. Together, the two platforms control an estimated 85%-90% of global prediction market volume.
Both platforms have raised capital at private valuations exceeding $20 billion. The trajectory, per Dealroom.co projections, points toward $1 trillion in annual volume by 2030 at a compound annual growth rate of approximately 80%.
For context: Americans wagered approximately $40 billion through legal sportsbooks in Q1 2026 alone — roughly in line with combined prediction market sports trading over the same period.
The Polymarket lawsuit is one front in a broader constitutional conflict.
The CFTC has sued six states — Arizona, Minnesota, Wisconsin, Illinois, New York, and Connecticut — asserting that state enforcement actions against prediction market platforms are preempted by the Commodity Exchange Act. The agency's position: the CEA grants it exclusive jurisdiction over event contracts traded through CFTC-licensed DCMs, and state gambling laws cannot apply to these instruments.
States argue the opposite. In July 2026, 44 state attorneys general submitted a joint letter during the CFTC's public comment period on its proposed event contract rule, asserting that "the Proposed Rule goes beyond the CFTC's statutory powers, is in tension with the Constitution" and urging the agency to "start afresh with its rulemaking and clarify that sports bets and gambling cannot be traded on [designated contract markets], but are instead subject to state law." The letter was led by Ohio Attorney General Andy Wilson. Five states — Florida, Georgia, New Hampshire, Missouri, and Texas — did not sign.
The CFTC simultaneously asserts its oversight authority stems from the Dodd-Frank Wall Street Reform and Consumer Protection Act and issued a proposed rule on June 10, 2026, providing substantive changes to Rule 40.11 and a new procedural framework for exercising authority over event contracts.
The CFTC has invoked emergency authority three times in 2026 to direct prediction markets to ignore state regulators — a power used only four times previously, all between 1976 and 1980.
The most notable instance followed New York's July lawsuit against Kalshi. After Kalshi sought federal assistance, the CFTC issued an emergency order requiring the platform to continue operating and honoring executed trades, according to CoinDesk. In a separate Michigan case, the CFTC described its order as the first time a state had attempted to interfere directly with executed derivatives transactions on a federal exchange.
Between July and August 2026, the CFTC issued a total of five letters or emergency orders focused on prediction markets, an intensity of intervention without precedent in the agency's history.
The jurisdictional dispute has produced conflicting appellate rulings, creating the conditions for Supreme Court review.
In April 2026, a federal appeals court ruled that the CEA "likely" preempts state gambling laws for sports event contracts traded on CFTC-licensed DCMs — siding with Kalshi. The Third Circuit held that these contracts qualify as federally regulated instruments.
On August 28, 2026, the Ninth Circuit reached the opposite conclusion, ruling that sports event contracts are not "swaps" under the CEA and that federal law does not preempt state gambling regulation.
This confirmed circuit split is a textbook trigger for Supreme Court review. New Jersey filed a petition for a writ of certiorari by September 3, 2026, asking the Court to resolve whether states or the federal government control oversight of prediction markets. According to Bloomberg Law, the divergent rulings make the issue "a strong candidate for Supreme Court review."
Prediction market traders on Polymarket itself currently assign a 64% probability that the Court will accept a sports event contract case by the end of 2026. If the Court takes the case, the ruling would set precedent not only for prediction markets but potentially for other crypto and DeFi products that straddle state and federal regulatory lines.
The lawsuit is fundamentally a dispute over economic rent extraction.
Under the gambling classification, prediction market operators would need to secure state licenses in every jurisdiction where they offer contracts. They would pay state gaming taxes — revenue that New York's complaint specifically notes "funds public schools, sports programs, and problem gambling treatment." States would retain enforcement power and the associated regulatory fees.
Under the federal derivatives classification, the CFTC collects registration fees and exercises oversight through its existing framework. Operators comply with a single federal regime: segregated customer funds, audited operations, transparent contract terms. States lose both the tax revenue and the regulatory authority.
For an industry projected to move $240 billion in 2026, the difference is material. Even a modest state gaming tax rate — New York imposes 51% on mobile sports betting gross revenue — applied to prediction market revenue would redirect substantial sums from platform operators to state treasuries.
Polymarket's $117.85 million in 2026 revenue, if subjected to New York's mobile sports betting tax rate, would imply roughly $60 million in state tax liability from a single platform in a single state. Scale that across the industry and across 44 states seeking jurisdiction, and the fiscal stakes become clear.
The question maps directly to the economic value framework that governs Web3 analysis: for every dollar of transaction value, who captures it — the federal regulator, the state regulator, or the platform?
New York sued Polymarket on September 24, 2026, alleging unlicensed gambling; Polymarket countersued hours later, asserting CFTC preemption under the CEA.
Combined prediction market monthly volume hit $53 billion in July 2026, doubling from $26 billion in May. Full-year 2026 volumes are projected at $240 billion.
44 state attorneys general have challenged the CFTC's authority over sports prediction markets in a joint letter, while the CFTC has sued six states and invoked emergency authority three times in 2026.
A confirmed circuit split between the Third Circuit (pro-federal preemption) and Ninth Circuit (pro-state authority) has produced a petition for Supreme Court review filed by September 3.
The economic stakes are direct: state gambling classification would redirect substantial tax revenue from platform operators to state treasuries; federal derivatives classification preserves a single regulatory regime under the CFTC.
The outcome will set precedent beyond prediction markets, potentially affecting how other crypto-native and DeFi financial products are classified under state vs. federal jurisdiction.
The Polymarket lawsuit is the sharpest articulation to date of a question the crypto industry has deferred for years: when does a blockchain-based financial product become a state-regulated gambling instrument? New York's answer — when users put money on uncertain outcomes — would subject prediction markets to the same licensing, taxation, and consumer protection regimes that govern casinos and sportsbooks. Polymarket's answer — when the CFTC grants a DCM license, federal law controls — would preserve a single regulatory framework and keep tax revenue at the federal level.
With $240 billion in projected 2026 volume, a confirmed circuit split, and a pending Supreme Court petition, the jurisdictional question is no longer theoretical. The Court's decision, if it takes the case, will determine whether prediction markets operate as federally regulated financial infrastructure or as state-licensed gambling businesses. The answer will define the economic value distribution for the entire sector.