Are Prediction Markets Legal? Two Federal Courts Now Disagree

The honest one-line answer, friend: prediction markets are legal at the federal level, contested state by state, and now the subject of a straight contradiction between two federal appeals courts. That last part is new, and it is the whole story. In April a federal appeals court ruled that Kalshi’s sports contracts are financial swaps beyond a state’s reach. In August a different federal appeals court read the same law and ruled they are not. Same product, same statute, opposite answers — which is precisely the situation that ends up at the Supreme Court.

Here is where it actually stands, and what it means if you’re deciding whether to put money on one.

The One Question Everything Turns On

Strip out the legal vocabulary and it reduces to a single question: is a contract on the outcome of a football game a financial derivative or a bet?

If it’s a derivative, it belongs to the Commodity Futures Trading Commission under the Commodity Exchange Act, and federal law overrides state gambling rules. If it’s a bet, it belongs to the states, which license and tax sports betting and have their own regulators. Every lawsuit, injunction and ban flows from how a given judge answers that one question. And judges do not agree.

Federally: Legal, and the CFTC Is Defending It

At the national level there is no ambiguity. Kalshi operates as a CFTC-registered exchange, and Polymarket re-entered the US market under the same framework. The federal position is that event contracts fall under exclusive federal jurisdiction, and the CFTC has backed that position in court rather than just asserting it — including joining the platforms in suing a state to stop a ban taking effect.

The Circuit Split, in Plain Terms

This is the part worth understanding, because it explains why nobody can give you a clean answer.

Court	When	Held	Effect
Third Circuit Kalshi v. New Jersey	4 April 2026 (2–1)	Sports contracts are swaps; federal law preempts NJ gambling law	New Jersey blocked from enforcing
Ninth Circuit Kalshi v. Nevada	28 August 2026	Sports contracts are not swaps; Nevada’s gaming rules apply	Nevada’s block stands

Read those two rows again. The identical product from the identical company is federally shielded in New Jersey and subject to state gaming enforcement in Nevada, because two panels of federal appellate judges interpreted the same definition and reached opposite conclusions. That is not a grey area or a slow rollout. It is a direct conflict, and a circuit split on a federal statute is the textbook reason the Supreme Court takes a case.

Until that happens, which court’s reasoning applies to you depends on which circuit your state sits in. That is an absurd way to run a national market, and everyone involved knows it.

September 2026: a Third Front Opens on Tribal Lands

On 16 September 2026 the Ninth Circuit added a question the circuit split does not cover. In Blue Lake Rancheria v. Kalshi, brought by the Blue Lake Rancheria and the Chicken Ranch Rancheria of Me-Wuk Indians, a three-judge panel held that Kalshi’s sports event contracts are class III gaming under the Indian Gaming Regulatory Act when they are accessed from tribal lands.

The reasoning is the part worth understanding, because it is the same reasoning states have been trying to make stick. The court refused to decide the case on the label attached to the product, and looked at the activity instead: Kalshi advertises sports betting to consumers, and the resemblance to a traditional sports bet is, in the panel’s words, overwhelming. It also decided where the gaming happens — at least in part, where the customer places the trade. So a user sitting on a rancheria is gaming on Indian lands even though Kalshi operates from New York and its servers sit somewhere else entirely.

Here is what most coverage got wrong, and it matters if you are trying to work out what changes tomorrow: the Ninth Circuit did not order Kalshi to stop. It reversed the district court’s denial of a preliminary injunction and sent the case back to Judge Jacqueline Scott Corley to weigh the remaining factors — irreparable harm, the balance of equities and the public interest. The tribes were held likely to succeed on the merits. That is not the same as an injunction, and nothing is switched off by this ruling on its own.

What it does is widen the problem for prediction markets from two fronts to three: federal preemption, where the circuits contradict each other; state gambling law, where the bans keep coming; and now tribal sovereignty, which is a separate body of federal law with its own logic and its own litigants. A Supreme Court review of the preemption question would not automatically settle the IGRA one.

The States That Tried to Ban Them

Minnesota went furthest, passing a first-of-its-kind law in May 2026 to criminalise prediction markets. It never took effect: days before the 1 August start date, a federal judge granted a preliminary injunction, finding the platforms likely to succeed on their argument that the CFTC has exclusive jurisdiction over these contracts. The platforms continue serving Minnesota users while the case proceeds. If you read somewhere that Minnesota banned prediction markets, that is half the story — the legislature did, the courts stopped it.

Nevada is the one place where the state clearly won. A judge found Kalshi’s sports contracts “indistinguishable” from a bet at a licensed Nevada sportsbook, and the Ninth Circuit let that stand in August. Sports event contracts are not available in Nevada without a gaming licence.

Maryland is where the states have gathered their strength: 38 states filed briefs supporting Maryland’s position that these contracts are unlicensed sports bets subject to state law. Several other states have issued cease-and-desist orders and been met with federal countersuits.

Where You Can Actually Trade Today

As a practical matter, prediction markets are live in most states, and Nevada is the clearest exception for sports contracts. Several other states are contested and availability can change on a single ruling — which is why any list of “legal states” you find, including any implied by this page, carries an expiry date. Check the platform’s own state availability at sign-up rather than trusting an article, this one included.

The Monkey’s Take: What This Means If You Play Casino

Two things, said plainly.

They are not a casino, and they are not a substitute for one. There are no slots, no live dealer, no table games — you are taking a position on a real-world outcome, on a platform regulated as a financial exchange. If you landed here because your sweepstakes casino closed and you’re looking for somewhere to play, this is not it; we set out the routes that actually are in where US players are going next.

And the legal ground is unresolved, which is different from illegal and also different from settled. Two appeals courts contradict each other, a Supreme Court review looks likely, and a single decision could change availability in your state overnight. That is a real risk to weigh, not a technicality — and this uncertainty exists despite federal registration, not because of its absence.

If what you want is real-money casino play, the safer routes haven’t changed: a regulated operator if your state licenses one, or an established offshore brand chosen on payout record. Our is online gambling legal in the USA guide covers where your state stands, and best crypto casinos USA ranks the offshore options on payout evidence. For the argument about whether prediction markets are simply sports betting wearing a suit, see prediction markets vs sports betting.

If you trade these markets rather than only read about them, the mechanics matter as much as the law: which venue your software is authenticated against decides what you can open, not just what is legal where you live. Our WinWeatherBot review works through that question in the context of a Polymarket trading tool — one we own ourselves, and say so at the top of the page.

Frequently Asked Questions

Are prediction markets legal in the US?

Federally, yes: Kalshi and Polymarket operate under the CFTC, which regulates them as derivatives markets and claims exclusive jurisdiction. Several states argue the sports versions are gambling. In August 2026 the Ninth Circuit agreed with that view, while in April the Third Circuit had rejected it — so the answer now depends partly on which federal circuit your state falls in, pending a likely Supreme Court review.

Did Minnesota ban prediction markets?

The legislature passed a ban in May 2026, but it never came into force. A federal judge blocked it days before its 1 August start date, finding that federal law likely gives the CFTC exclusive jurisdiction. The platforms still operate in Minnesota while the litigation continues.

Is Kalshi available in Nevada?

Not for sports event contracts. A Nevada judge found them “indistinguishable” from a licensed sportsbook bet, and in August 2026 the Ninth Circuit held they are not swaps, so Nevada’s gaming rules apply. Operating there requires a Nevada gaming licence.

Why are two federal courts disagreeing?

Because they answered the same question differently: whether a sports event contract is a “swap” under the Commodity Exchange Act. The Third Circuit said yes, which makes it federal territory and blocks state gambling law. The Ninth Circuit said no, which leaves state gaming regulation intact. A split like this between appeals courts on a federal statute is the standard reason the Supreme Court steps in.

What did the September 2026 tribal lands ruling change?

On 16 September 2026 the Ninth Circuit held that Kalshi’s sports event contracts count as class III gaming under the Indian Gaming Regulatory Act when accessed from tribal lands, and that the gaming happens where the customer places the trade. It did not order Kalshi to stop: it reversed the denial of a preliminary injunction and sent the case back to the district court to weigh the remaining factors. It opens a third legal front alongside federal preemption and state bans.

Are prediction markets the same as online casinos?

No. They are financial contracts on real-world outcomes traded on a CFTC-regulated exchange, not casino games. There are no slots or table games, the risk profile is different, and their legal status is unsettled in a way a licensed casino’s is not. They are not a replacement for a casino or a sportsbook.

18+ (21+ where required) · This article is general information, not legal or financial advice — prediction-market law varies by state and is changing quickly; verify the current position before acting. Play responsibly. Problem gambling? Call 1-800-MY-RESET or the National Council on Problem Gambling at 1-800-522-4700 in the US; in Canada, ConnexOntario at 1-866-531-2600.

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