Robinhood Switched Michigan Off on Wednesday and Asked the Supreme Court on Thursday to Rule That It Never Has To

Editor's note: TrueEdge builds odds tools and earns affiliate commissions from licensed sportsbooks. This piece argues that a prediction-market operator's litigation strategy has undercut its own strongest legal claim, and our commercial interest runs toward the licensed books that compete with it. Weigh it accordingly. Our editorial position has not changed: criminal exposure is the wrong instrument to point at a federally registered exchange.

At the end of the day on Wednesday, September 9, Robinhood Derivatives stopped offering new sports-related event contracts to customers in Michigan. Not some of them. All of them, across every designated contract market it routes to — the stipulation names KalshiEX and it names Rothera Exchange and Clearing, which is Robinhood's own CFTC-licensed venue, launched in June. Positions already open close by the end of October 9, unless a customer gets out sooner.

The next morning, Robinhood filed a petition for a writ of certiorari at the Supreme Court of the United States arguing that a state may not do to it what Michigan just did.

Both things are defensible. Neither is a scandal. A litigant may comply with a state while appealing, and the September 4 stipulation that produced the shutoff says so in as many words: it preserves every party's rights, obligations and defenses, expressly including Robinhood's claim that the Commodity Exchange Act preempts Michigan's gambling law as applied to event contracts on a federally registered exchange. Michigan, for its part, agreed to forbear from enforcement over past activity while Robinhood complies. No money changed hands. No licence was issued. Nobody conceded anything on paper.

What happened off the paper is the story.

The workability plank just collapsed, and it was load-bearing

Strip the preemption argument down and it has two parts. The first is textual — whether sports event contracts are within the CFTC's exclusive jurisdiction under the Commodity Exchange Act as amended by Dodd-Frank. That part is genuinely hard, genuinely contested, and produced a real circuit split: the Third Circuit went New Jersey's way in April, the Ninth Circuit went Nevada's way on August 28 in a 3-0 panel opinion by Judge Ryan Nelson, and the Supreme Court now has petitions from Robinhood and from New Jersey sitting in front of it on the same question.

The second part is practical, and it is the one every operator leads with in public. It says a national exchange cannot function under fifty regulators. That a designated contract market is a single order book, and an order book cannot be sliced by state line without ceasing to be one. That a patchwork is not a compromise, it is a shutdown.

Robinhood filed its complaint against Michigan officials on March 4. Judge Paul L. Maloney's court denied a preliminary injunction on June 17; the notice of appeal went up the next day, and the Sixth Circuit docketed it as No. 26-1542 on June 23. From the September 4 stipulation to the shutoff was five days. From the shutoff to the position-closing deadline is thirty. That is the whole operational cost of removing an entire state from a national event-contract book: a geofence, a calendar, and a month.

Every attorney general in the country watched that happen. It is now a demonstration, not a theory. When Michigan's next brief says the patchwork is administrable because Robinhood administered it, the sentence will be true.

Two companies, one legal position, opposite postures

Kalshi does not do this. Kalshi's answer to Ingham County was to keep trading until Judge Rosemarie Aquilina signed a preliminary injunction on September 1 — geofence Michigan or pay $500,000 per day, no deposits from state residents, no account creation, and no marketing into the state through apps, push notifications, influencers, affiliates or paid placements. Attorney General Dana Nessel announced it the following morning as the second such order she had secured. On Thursday, Kalshi's response to the Ninth Circuit was to ask for rehearing en banc, calling the panel's reasoning — sports event contracts are not swaps, yet the CFTC regulates them — a position "at war with itself."

It is a good line. It is also, as a route to relief, close to hopeless: the gaming attorney Daniel Wallach counts eleven en banc petitions granted out of 730 in the Ninth Circuit in fiscal 2025. That is 1.5%. Kalshi's petition buys time and preserves the record. Robinhood's cert petition is the shot.

The two companies want the identical holding and are behaving completely differently, and the reason is not conviction. It is what each has at risk. Kalshi is a private company whose entire enterprise is event contracts; a state it switches off is revenue it never sees again and a precedent that invites the next state. Robinhood is a listed brokerage with a securities licence, a banking ambition, and a regulatory relationship with the SEC and FINRA that it will still need in 2031. Event contracts produced $156 million of its revenue in the second quarter on 13.6 billion contracts traded — a tenfold increase year over year, and a genuinely spectacular line item, and still a minority of the $1.31 billion the company booked that quarter.

A firm with one product fights on the product. A firm with a portfolio protects the portfolio. Michigan is roughly 3% of the United States by population, and Robinhood decided that was a cheaper thing to lose than an adverse contempt record in front of a district judge whose circuit is already hearing its appeal.

The best version of the other side

Here is the strongest argument that none of this matters, and it is not weak.

Interim compliance under an express reservation of rights is ordinary litigation hygiene. Courts see it constantly and draw no inference from it, because drawing one would punish parties for de-escalating — which is precisely what judges want them to do. Robinhood's lawyers wrote the reservation clause for exactly this reason and it will do its job. And a company that turns a product off in one state for the duration of an appeal has not conceded that turning it off is lawful; it has conceded that a contempt fight is a bad use of a Thursday.

There is also a fair reading in which Robinhood is simply better advised than Kalshi. Defiance has bought Kalshi criminal referrals in Arizona, a half-million-dollar daily exposure in Michigan, and a growing collection of state orders that will be cited against it in every subsequent case. Compliance-under-protest has bought Robinhood a clean docket and a cert petition filed from a position of institutional respectability. If the Supreme Court takes the case, the party that behaved better in the meantime is not disadvantaged by it.

All of that is right, and it is why the concession here is not legal. It is evidentiary in the loosest sense and rhetorical in the strongest one. Irreparable harm is a fact question. A company arguing that state-by-state regulation would destroy its business, in a filing dated one day after it absorbed state-by-state regulation and kept operating, has made the harm harder to describe as irreparable and much harder to describe as impossible. The word the briefs want is unworkable. The word Michigan now gets to use is Tuesday.

What we do not know

We have not resolved which co-appellant Robinhood's Sixth Circuit case is consolidated with — reporting variously puts it with Coinbase's derivatives arm and with Polymarket's US entity, and we are not going to guess at a docket we have not read. We also do not know whether the CFTC intends to intervene here as it has in New York and Connecticut, and the agency's pending sports-contract rulemaking makes that a live possibility rather than a remote one.

What is not in doubt is the sequence. On Wednesday a federally registered venue proved a state can switch it off. On Thursday it asked nine justices to hold that a state cannot. Those are compatible legal positions and they make a terrible pair of headlines, and the second one is going to be read in light of the first for as long as this litigation lasts.