Sports contracts close on 25 November; the rest of the platform does not
Polymarket US has agreed to stop offering new sports-related event contracts to Michigan customers and to close any Michigan positions still open at the end of the day on 25 November 2026. The agreement was reached with the Michigan Gaming Control Board (MGCB) and approved by the US District Court for the Western District of Michigan.
The shutdown of Polymarket Michigan sports contracts is narrow in two directions. It covers sports-related markets, not politics, economics or the other event contracts the exchange lists. And it covers Michigan, not the United States. Nothing in the stipulation ends Polymarket US as a business or settles whether sports event contracts are gambling.
That last point is where most of the commentary goes wrong. The common read — Michigan won, prediction markets lost — reaches the right conclusion about what Michigan residents can trade, for the wrong reason. No judge decided the merits here. Polymarket US signed a stipulation that lets it avoid state enforcement action, and a court approved it. A settlement is not a ruling, and the question underneath it stays open.
What the agreement actually covers
Two obligations sit at the centre of the deal: no new sports-related event contracts for Michigan customers, and no Michigan positions left open after 25 November 2026. Customers can close their own positions voluntarily before that date. Anything still open at the end of that day, Polymarket US is required to close itself.
The practical scope looks like this:
| Market type | Michigan customers | Customers in other states |
|---|---|---|
| Sports-related event contracts | New listings stop; open positions closed by 25 November 2026 | Not covered by this agreement |
| Other event contracts (politics, economics, culture) | Not covered by this agreement | Not covered by this agreement |
What the published summary of the stipulation does not spell out is where “sports-related” stops. A market on who wins a division is obviously in. A market on a coaching hire, a league’s media deal, or an athlete’s off-field conduct is less obvious. Polymarket US has to draw that line in its own notice to Michigan users, and that notice is the document to read rather than any secondhand description of it, including this one.
Why a state regulator can do this to a federally regulated exchange
Michigan licenses sports wagering. The MGCB issues the licences, polices unlicensed operators, and treats taking bets on sporting events from Michigan residents without one as unlawful. From the board’s position, a contract that pays out based on who wins a game is a sports bet regardless of what it is called on the trading screen or which federal agency oversees the venue listing it.
Polymarket’s side of the argument runs through a different statute entirely. Event contracts listed on a CFTC-regulated designated contract market are derivatives, supervised federally, and federal commodities law has historically pre-empted state regulation of futures trading. Under that reading, a state gaming board has no more authority over a sports event contract than it would over an oil futures contract.
How CFTC oversight differs from a state sports wagering licence
The two regimes are built for different problems and that is the root of the conflict. A CFTC-regulated exchange is overseen as market infrastructure: contract listing standards, market integrity, position limits, clearing, surveillance for manipulation. The agency asks whether a market functions fairly, not whether the thing being traded is a game.
A state sports wagering licence is built around consumer and integrity protections specific to betting: operator suitability, tax, geofencing, advertising limits, self-exclusion programmes, league data rules, problem-gambling funding. Trading venue rules do not replicate those, which is exactly what state regulators object to. Neither framework was written with the other in mind, and the courts are working through the overlap case by case.
The deadline cost most users will overlook
The risk in this wind-down is not the loss of access. It is holding a position into 25 November and letting someone else decide when you exit. Anything a Michigan customer still holds on that evening gets closed by Polymarket US rather than by the customer, and the exact handling of pricing, settlement and withdrawals is set out in Polymarket’s own notice rather than in the court filing summary.
Long-dated markets are where that bites. A season-long futures position that will not resolve for months has to come off the book early, and thin order books tend to get thinner as a deadline approaches and the pool of counterparties shrinks. Traders who wait until the final week may find the only available exit is worse than the one they had in October.
Three things are worth doing before the date, in this order: read the notice Polymarket US sends to Michigan accounts, check which of your holdings it classifies as sports-related, and decide whether to close them yourself while you still control the price. Treat any figure you see quoted elsewhere about settlement prices or withdrawal timing as unverified until it appears in that notice.
Michigan is a template, not an outlier
The MGCB has done versions of this before. The Polymarket agreement follows similar deals with Coinbase and Robinhood over sports event contracts, and a preliminary injunction against Kalshi. Four large, well-lawyered platforms, one state, one pattern: three negotiated exits and one contested fight.
The distinction matters for what comes next. Operators that settle buy certainty and avoid enforcement, but they also leave the pre-emption question untested. Kalshi has chosen to litigate it instead, and that route produces the precedent, whichever way it goes. Other states have raised the same objections to sports event contracts, so Michigan’s approach is a template other regulators can copy rather than a local quirk — and the CFTC’s own posture toward sports contracts remains a live variable that could reshape the whole dispute.
What Michigan users can legally use instead
For prediction-market access, Polymarket’s non-sports markets remain available under this agreement, and the same contracts stay available to users outside Michigan. For sports-outcome exposure specifically, the legal route in Michigan is an MGCB-licensed online sportsbook; the board publishes the list of licensed operators, and that list is the authoritative place to check an operator’s status.
Licensed sportsbooks and event-contract exchanges are not the same product. A sportsbook sets a price with a built-in margin and takes the other side of your bet. An exchange matches you against other traders and charges fees. Neither changes the basic arithmetic: both are priced so that the operator keeps a share of what flows through, and over enough wagers that share comes out of the customer.
If you move from one to the other, move the habits too. Set deposit and loss limits, use the self-exclusion and cool-off tools Michigan-licensed operators are required to offer, and treat money staked on sports as money you have decided to spend rather than capital you expect to grow.
What stays unresolved after 25 November
Michigan residents lose sports contracts on Polymarket; the legal question of whether a state can reach a federally regulated exchange survives entirely intact. A stipulation binds two parties. It does not bind the next state, the next court, or the CFTC.
So the deadline is a date for traders, not an ending for the industry. Confirm the final mechanics through Polymarket’s official notice to Michigan accounts and the MGCB’s own announcements rather than aggregated coverage, including the dates in this piece, and assume this list of affected states and platforms is still being written.