The legal fight over sports prediction markets is not simply about whether a product feels like betting. It is about which law controls a contract traded on a federally registered derivatives exchange. The CFTC argues that the Commodity Exchange Act gives it exclusive jurisdiction over transactions on designated contract markets. State gaming regulators argue that sports event contracts function as sports wagering and remain subject to state licensing and consumer-protection rules.
In 2026, those arguments produced a genuine federal appellate split. The Third Circuit sided with Kalshi’s federal-preemption position in the New Jersey litigation. The Ninth Circuit later held that Kalshi had not shown likely preemption of Nevada gaming law for its sports contracts. New Jersey then sought U.S. Supreme Court review, making the dispute unusually live for an explanatory article.
The federal argument starts with the Commodity Exchange Act
The CFTC’s position is that event contracts can qualify as derivatives such as swaps or futures and, when traded on a designated contract market, fall within the federal framework Congress created for national derivatives markets. The Commission’s March 2026 prediction-markets rulemaking notice points to the CEA’s exclusive-jurisdiction language for relevant swaps and futures transactions on designated markets.
From that perspective, allowing each state to decide independently whether a federally listed contract can trade would fracture a national market into state-by-state rules. The CFTC has taken that position in litigation and has itself sued states, including New Mexico, to block enforcement against CFTC registrants.
The Commission’s June 2026 New Mexico lawsuit announcement states the federal position directly: the CFTC seeks declaratory and injunctive relief against state efforts it views as preempted. That is the agency’s litigation stance, not a final nationwide judicial rule.
The state argument starts with gambling authority
States respond that sports contracts can be ordinary wagers in substance even if they are packaged as exchange-traded contracts. State sports-betting systems typically regulate licensing, geolocation, minimum age, taxation, responsible-gambling controls and game integrity. Regulators argue that Congress did not silently displace that framework simply by creating federal derivatives regulation.
The central statutory question is complicated by a special CEA provision concerning event contracts that involve enumerated activities including gaming. The CFTC’s June 2026 event-contract NPRM proposes a structured process for determining whether a contract involves one of those activities and whether it is contrary to the public interest. The proposal also seeks to define “gaming.”
That rulemaking matters because it shows the agency itself is still refining how the statutory gaming language should operate. The final rule may change the regulatory framework, but it cannot by itself erase federal courts’ role in deciding preemption and statutory meaning.
The Third and Ninth Circuits reached different results
In April 2026, the Third Circuit upheld preliminary relief protecting Kalshi from New Jersey enforcement. The court concluded that Kalshi was likely to succeed on its argument that the CEA preempted state law as applied to sports-related event contracts traded on its CFTC-regulated market. That decision strengthened the federal-jurisdiction theory within the Third Circuit.
On August 28, the Ninth Circuit reached a materially different conclusion in KalshiEX v. Assad. The court held that Kalshi had not shown a likelihood that the CEA preempted Nevada gaming regulation for the sports contracts at issue. Its analysis concluded that the sports contracts were not swaps under the cited statutory definition and that existing Regulation 40.11 also affected the treatment of gaming contracts.
The split is important because neither decision can be treated as a simple national answer. GambleRoad’s state-by-state gambling law overview already shows why gambling regulation often varies by jurisdiction. Prediction markets add a federal derivatives layer on top of that state structure.
The Supreme Court question is now concrete
New Jersey requested more time in June to file a Supreme Court petition challenging the Third Circuit decision. On September 2, Reuters reported that the state filed its petition, asking the Court to address whether states can regulate sports contracts offered through prediction markets. The petition followed the Ninth Circuit’s contrary ruling only days earlier.
A Supreme Court petition does not mean the Court will hear the case. The justices must first decide whether to grant review. Until then, the conflicting appellate decisions, additional state cases and the CFTC’s ongoing rulemaking continue in parallel.
This is why categorical legal statements are especially risky in September 2026. A platform’s federal registration is an important fact, but it does not currently eliminate every state-law dispute. Likewise, a state cease-and-desist order is not proof that federal derivatives law is irrelevant.
What the CFTC is doing while the courts litigate
The agency withdrew its 2024 event-contract rule proposal in February 2026 and replaced that approach with new work. In March it opened a broader prediction-markets ANPRM. In June it proposed a new framework for event contracts involving enumerated activities. It has also issued advisories on product certification, pricing and market integrity.
The February withdrawal notice specifically referenced state regulatory actions, litigation, preemption and the meaning of gaming as reasons to reconsider the earlier proposal. That makes the jurisdiction conflict part of the rulemaking record, not an external issue the CFTC is ignoring.
For readers comparing the U.S. dispute with other systems, GambleRoad’s global gambling law guide provides broader jurisdictional context. The key U.S. point is narrower: sports event contracts sit at the intersection of two mature regulatory systems that currently disagree about the boundary between them.
The safest conclusion in 2026
No one-sentence label resolves the conflict. Calling prediction markets “just federally regulated derivatives” ignores the Ninth Circuit ruling and state enforcement. Calling them “just illegal sportsbooks” ignores CFTC registration, the Third Circuit decision and the federal agency’s active jurisdictional position.
The legally accurate approach is to identify the contract, exchange, state, current court orders and applicable federal rules at the time of use. The result can change as courts rule, the CFTC finalizes regulations or Congress amends the law. This article therefore explains the jurisdiction problem rather than predicting which side will ultimately prevail.
For operators and customers, the practical consequence is geographic uncertainty. A contract available through one federal market may still be subject to injunctions, enforcement threats or access changes tied to a particular state. That makes current location and current court orders part of the product analysis, not an afterthought.