The legal battle surrounding prediction market operator Kalshi is increasingly on a path toward the Supreme Court of the United States, with legal experts and historical precedent increasingly pointing to a likely resolution by June 2027.
- A growing circuit split over prediction markets’ legal status is increasing the likelihood of a Supreme Court review by 2027.
- Conflicting rulings hinge on whether event contracts fall under federal derivatives law or state-regulated gambling frameworks.
- The case could reshape U.S. gaming by determining federal versus state authority over prediction markets and sports event contracts.
At issue is whether event-based contracts tied to sports outcomes fall under federal derivatives law or are subject to state and tribal gaming regulation. That question, seemingly set to produce divergent rulings across federal courts, is the type of high-stakes statutory and federalism conflict the Supreme Court has consistently stepped in to resolve.
A pivotal development came with a ruling from the United States Court of Appeals for the Third Circuit, which found Kalshi’s contracts qualify as “swaps” under the Commodity Exchange Act. The decision effectively places those products under the exclusive jurisdiction of the Commodity Futures Trading Commission (CFTC), preempting state gambling laws within that circuit.
That interpretation conflicts with arguments advanced in parallel litigation, including a closely watched case in the United States Court of Appeals for the Ninth Circuit, where Nevada state regulators argued prediction market sports event contracts constitute illegal gambling. The Ninth Circuit Court has not issued its decision, but all three judges who heard the case expressed skepticism toward prediction markets’ legal arguments.
Additional rulings in other circuit courts could further fragment the legal landscape, increasing the likelihood of Supreme Court intervention.
Legal scholars widely point to the emergence of a “circuit split” as the key trigger. Empirical research, including analyses published in the Harvard Law Review, shows the Supreme Court is significantly more likely to grant certiorari when federal appellate courts reach conflicting interpretations of the same statute.
That dynamic is now firmly in place. That doesn’t mean the timeline is set in stone.
The CFTC could seek expedited consideration that is now too late in the Court’s current October-to-June term but could move up action earlier in the ensuing period. In a less likely move, the Supreme Court could take up action before the Ninth Circuit ruling or issue an interim decision in its summer “shadow docket.”
Those maneuvers seem unlikely now, teeing up a more typical timeline of a granted petition to hear the case this summer, oral arguments in late fall 2026 or early winter 2027, and a final ruling in June of next year.
Timeline estimate
Based on standard Supreme Court procedure and comparable cases over the past decade, the timeline for review is relatively well defined.
The first phase centers on petitions for certiorari, or an appeal to the Supreme Court to hear the case. Under the Court’s rules, parties have 90 days from a final appellate decision to seek review. New Jersey regulators have not filed an appeal in the Third Circuit ruling, but Kalshi and other major prediction markets would seem poised to do so if the Ninth Circuit goes against them.
The Ninth Circuit will likely issue its ruling in May or June.
With major rulings expected to be finalized by mid-2026, petitions are likely to be filed between July and September. Those filings would most likely be accompanied by a wave of amicus briefs from states, tribal governments, and industry stakeholders, further underscoring the national implications.
Once petitions are filed, the case would enter the Court’s consideration cycle at the start of its next term in October. Petitions are typically reviewed within several weeks, with justices deciding whether to grant certiorari during private conferences. Given the combination of federal preemption questions and the economic significance of the underlying market, most projections place a grant between November and December 2026.
Projected Litigation Timeline
That prediction market timeline aligns with other recent high-profile administrative law and federalism disputes, including West Virginia v. EPA and NFIB v. OSHA.
Following a grant of certiorari, briefing on the merits would likely take place between January and early March 2027. Academic commentary, including work from the Yale Journal on Regulation, notes that cases involving overlapping statutory regimes - particularly those touching on agency jurisdiction - tend to attract extensive amicus participation, which can modestly extend briefing timelines but rarely alters the overall term structure.
Several dozen attorneys general have filed companion amicus briefs, as have tribal and commercial gaming stakeholders and government regulators.
Oral arguments would likely be scheduled for the late winter or early spring sitting. The Court often places complex statutory interpretation cases later in the argument calendar, particularly when multiple consolidated cases or extensive briefing records are involved.
A final decision would almost certainly arrive at the end of the term in June 2027. Historically, the Court reserves its most consequential rulings for the closing weeks of the term, particularly in cases involving major questions of federal authority. The trajectory mirrors that of Murphy v. NCAA, which struck down the federal ban on sports betting and was decided in May 2018 after being argued in December 2017.
Legal stakes
Legal academics increasingly frame the Kalshi dispute as a hybrid between a preemption case and a “major questions” doctrine challenge.
Scholarship suggests the Court has grown more skeptical of expansive assertions of agency authority absent clear congressional authorization, a theme that could shape how it evaluates the scope of the Commodity Exchange Act. At the same time, precedent affirms that where Congress has granted exclusive jurisdiction to a federal regulator, that authority can supersede conflicting state laws.
The stakes extend well beyond a single company.
A ruling affirming federal jurisdiction could open a pathway for prediction market sites to operate nationally under a derivatives framework, potentially reshaping competition with state-regulated sportsbooks. Conversely, a decision favoring state and tribal authority would reinforce the existing patchwork system that has governed sports betting since Murphy.
With petitions expected within months and a decision likely within roughly one year of acceptance, the Supreme Court appears poised to deliver a definitive answer by June 2027 - one that could redraw the boundary between financial markets and gaming in the U.S.
