Kalshi's Legal Battle Over Prediction Markets Could Escalate to Supreme Court

An appellate court is weighing arguments that could reshape how crypto and prediction markets face regulation across the United States. The Ninth Circuit Court of Appeals heard oral arguments Thursday from Kalshi—a prediction markets platform—and Nevada state authorities over a contentious dispute: whether event contracts fall under federal or state jurisdiction.

The Core Regulatory Battle

The fight hinges on a fundamental question: Are prediction market contracts "swaps" governed by the Commodity Futures Trading Commission (CFTC) at the federal level, or should states like Nevada regulate them as gambling products requiring gaming licenses?

Kalshi's legal team made a forceful case for federal oversight. "I think the body of case law does demonstrate that what we really need to avoid here is having a state and a federal court considering exactly the same issue at exactly the same time and potentially reaching different outcomes," Kalshi attorney Colleen Sinzdak told the court Thursday.

This isn't an abstract concern. The company and other prediction market platforms have already faced a patchwork of state-level enforcement actions. Arizona filed criminal charges against Kalshi—but a federal court blocked Arizona authorities from enforcing those state gambling laws on the company's event contracts just last week. Nevada now seeks to prevent Kalshi from offering certain event-based contracts without a gaming license.

A Fracturing Legal Landscape

The fractured regulatory approach threatens the broader prediction markets ecosystem. We're watching crypto analysis unfold in real-time as competing jurisdictions stake conflicting claims over the same assets. CFTC Chair Michael Selig has already backed Kalshi's position in similar disputes involving Crypto.com's prediction markets against Nevada.

The appellate court hasn't announced a decision yet, but legal experts aren't waiting—many are already speculating this reaches the Supreme Court.

Coinbase chief legal officer Paul Grewal, whose company has significant stakes in prediction markets regulation, shared that assessment publicly. "Either way, I stand by my longstanding prediction— the Supreme Court will resolve whether sports contracts on Designated Contract Markets are swaps subject to the exclusive jurisdiction of the CFTC," Grewal posted Thursday on X following the oral arguments.

Why This Matters for Crypto Trading and Portfolios

The resolution will define the future of prediction markets as an asset class. Industry projections expect the market to hit $1 trillion by 2030—making this regulatory battle anything but academic. The Supreme Court's 2018 Murphy decision gave states authority over sports gambling, complicating the federal vs. state question further.

The outcome determines whether portfolio managers can access prediction market instruments broadly, or face a fractured state-by-state compliance nightmare. It also signals how aggressively the CFTC will defend its turf in crypto-adjacent markets.