Prediction Markets vs. Sportsbooks: Same Game, Different Rulebook

Practical Explainer | Current through September 12, 2026.

Put two apps next to each other during an NFL game.

One offers Browns +150.

The other asks: “Will Cleveland win?” A “Yes” contract costs 40 cents and pays $1 if Cleveland wins.

To the person risking money, the distinction may seem almost absurd. In both cases, money changes hands based on the outcome of the same football game.

Legally, however, those transactions may live in entirely different regulatory worlds.

A traditional sportsbook operates under state gambling law. A federally regulated prediction market argues that it is operating a derivatives exchange under the Commodity Exchange Act, or CEA, and that its “event contracts” fall within the exclusive jurisdiction of the Commodity Futures Trading Commission.

That distinction is no longer theoretical. States and prediction-market operators are litigating it across the country. In April 2026, the Third Circuit held that sports-event contracts offered on a CFTC-regulated exchange qualified as swaps and were protected from New Jersey gambling regulation. In August, the Ninth Circuit reached essentially the opposite conclusion in a Nevada case. New Jersey has now asked the U.S. Supreme Court to intervene.

So what actually separates a prediction market from a sportsbook?

The short answer is that the screen is not the law.

A sportsbook takes wagers under a state gambling license. State law generally determines whether sports betting is permitted, who may offer it, what events and wager types are allowed, where customers may bet, and what consumer-protection and integrity rules apply.

A prediction market, in the form now generating controversy, operates through a federally registered designated contract market, or DCM. Instead of calling the transaction a bet, the exchange lists a standardized contract whose value depends on whether some future event occurs. Market participants buy and sell positions in that contract, and the contract eventually settles according to predetermined rules.

The CEA gives the CFTC “exclusive jurisdiction” over certain swaps and futures transactions traded on federally regulated markets. It also defines some swaps broadly enough to encompass contracts whose payment depends on an event or contingency associated with a potential financial, economic, or commercial consequence.

That creates the central legal question:

When a federally regulated exchange offers a contract on who wins a football game, is it a federally regulated derivative—or simply a sports bet wearing different clothes?

Right now, federal courts disagree.

The economic experience can therefore converge even when the legal theories do not.

That is why the prediction-market fight is fundamentally a classification fight.

Take a simplified contract:

Will Cleveland win Sunday?

Suppose a “Yes” contract is trading at $0.40. A buyer pays 40 cents. If Cleveland wins, the contract settles at $1. If Cleveland loses, it settles at $0.

The 40-cent market price roughly implies that traders collectively value the “Yes” outcome at 40 percent—although market prices are not perfect probability estimates and can reflect liquidity, transaction costs, participant behavior, and other factors.

Unlike a traditional sportsbook, the exchange need not simply take the opposite side of every customer's position. Buyers and sellers trade through the market, often with market makers providing liquidity.

That difference is real.

But it does not answer the legal question. A state regulator can reasonably respond: whatever machinery sits behind the interface, someone still put money at risk based on whether a team wins a game.

And that is exactly where the fight begins.

The easiest way to understand the current law is to separate three questions that often get collapsed into one.

Calling something a “prediction market” does not place it under CFTC jurisdiction.

The important question is whether the transaction is being offered on a properly registered federal derivatives market, such as a DCM, and whether the particular product falls within the CEA.

That distinction matters. An offshore website, informal betting pool, decentralized protocol, or ordinary gaming company cannot obtain federal protection simply by changing “bet” to “event contract” in its marketing.

The label is not the jurisdiction.

This is now one of the central disputes.

The CEA's definition of “swap” includes certain contracts whose payment or delivery depends on an event or contingency associated with a potential financial, economic, or commercial consequence.

The Third Circuit read that language broadly in KalshiEX LLC v. Flaherty. It concluded that sports outcomes can have financial and commercial consequences for broadcasters, advertisers, sponsors, franchises, communities, and others. Kalshi's sports contracts therefore fit within the statutory definition of swaps, the court reasoned. Because they traded on a CFTC-licensed DCM, the court concluded that they fell within the CFTC's exclusive jurisdiction.

The Ninth Circuit disagreed in KalshiEX LLC v. Assad. Its August 28, 2026 decision held that the definition should not be stretched to turn ordinary sports bets into swaps merely because sporting events have downstream economic effects. In its view, Kalshi's sports-event contracts were sports bets, not the kind of swaps Congress placed exclusively under CFTC control.

That disagreement is enormous.

If the contract is not a CEA-regulated swap, much of the federal-preemption argument disappears.

This is the preemption question.

The CEA says the CFTC has “exclusive jurisdiction” over specified derivatives transactions traded or executed on federally regulated markets. Prediction-market operators argue that allowing every state to separately prohibit those same contracts would recreate exactly the regulatory patchwork Congress eliminated for derivatives markets.

The Third Circuit substantially accepted that theory. It held that New Jersey was likely preempted from using its gambling laws to prohibit Kalshi's sports contracts on a CFTC-regulated DCM.

The Ninth Circuit rejected it as applied to Nevada's gaming laws. Because the court concluded that the sports contracts were not swaps—and because of the CFTC's existing gaming rule—it held that Kalshi had not shown that Nevada's regulation was preempted.

So, as of September 2026, the answer can literally change depending on which federal appellate court's law controls.

Even if a sports-event contract qualifies as a derivative, there is another problem.

Congress gave the CFTC special authority over event contracts involving specified subjects, including terrorism, assassination, war, unlawful activity, and gaming. The CFTC implemented that provision through Rule 40.11. The current regulation says a registered entity “shall not” list an applicable contract that “involves, relates to, or references” gaming.

The current rule does not define “gaming.”

That omission has become exceptionally important.

The Third Circuit emphasized that Kalshi had self-certified its sports contracts and that the CFTC had not undertaken a review resulting in a determination prohibiting them.

The Ninth Circuit took a much different view: sports wagering is gaming, Rule 40.11 currently prohibits gaming-related contracts, and CFTC inaction does not erase the text of the regulation.

That disagreement exposes one of the strangest features of the current system: the CFTC is defending federal control of sports prediction markets while its existing regulation contains language that states are using to argue those contracts should not be listed in the first place.

The agency is trying to resolve some of that tension.

In February 2026, the CFTC withdrew an earlier event-contract proposal and a 2025 staff advisory concerning sports contracts. It then opened a broader prediction-market rulemaking in March.

On June 10, the CFTC proposed a major revision of Rule 40.11.

Importantly, that proposal is not yet final law.

The proposal would define “gaming” as an activity undertaken for recreation or entertainment, governed by rules, and producing measurable outcomes dependent on participants' luck, skill, or athletic ability. It would then use a contract-by-contract public-interest framework rather than treating every contract touching an enumerated activity as automatically forbidden.

For sports, the proposal is particularly revealing. The CFTC preliminarily indicated that contracts involving aggregate professional or collegiate results—wins, final scores, point differentials, tournament advancement and similar objectively verifiable outcomes—could be unlikely to fail the public-interest test when backed by strong surveillance and integrity protections.

It was considerably more skeptical of contracts tied to player injuries, officiating decisions, discrete player-controlled acts, physical altercations, and pre-collegiate sports. Those products create obvious concerns about manipulation, inside information and perverse incentives.

In other words, the CFTC appears to be moving toward a model that distinguishes which sports contracts should trade rather than asking only whether sports contracts may trade at all.

But until a final rule is adopted, the existing Rule 40.11 remains the operative regulation.

This is probably the most commonly misunderstood procedural point.

CFTC rules allow a DCM to list many new products through self-certification. The exchange files documentation stating that the product complies with the CEA and CFTC regulations. It generally does not need to wait for an individualized affirmative Commission order blessing that specific contract before trading begins.

The word certified therefore does a lot of misleading work in public discussion.

A sports contract appearing on a federally regulated exchange does not necessarily mean five commissioners—or even the agency staff—conducted a full merits proceeding and affirmatively declared: This contract is lawful.

Indeed, in July 2026, CFTC staff specifically warned DCMs against overly broad, template-style event-contract self-certifications and reiterated the information required for proper submissions.

That distinction matters enormously in the pending litigation.

Not quite.

Murphy v. NCAA invalidated PASPA's attempt to prevent states from authorizing sports wagering. It did not create a federal sports-betting license or require every state to permit sportsbooks. The result was largely to return the policy choice to the states.

That is why ordinary sportsbooks still operate through state-by-state regulatory systems.

That is precisely what the current litigation is about.

The CFTC itself is aggressively defending its asserted exclusive jurisdiction and has sued multiple states that attempted to apply gambling laws to federally registered prediction markets.

But federal appellate courts now disagree about whether that argument works for sports contracts.

Also too simple.

Economic similarity matters, but legal classification depends on statutory text and regulatory structure. The Third Circuit viewed the contracts as federally regulated swaps. The Ninth Circuit viewed the same basic category as sports bets falling outside the relevant swap definition.

The fact that the products look alike is not the conclusion. It is the problem the courts are trying to solve.

Too broad.

Even broad federal preemption of DCM trading would not necessarily erase every generally applicable state law. Fraud, contract, consumer-protection and other claims can raise different preemption questions.

The real dispute is whether a state may use its gambling regulatory regime to prohibit or condition the listing and trading of federally regulated sports-event contracts.

This is not simply an argument over which government office gets the paperwork.

For operators, the difference between federal and state treatment determines whether a platform can potentially scale through one national derivatives framework or must obtain gaming approvals jurisdiction by jurisdiction.

For states, the stakes include regulatory authority, responsible-gaming policy, age and location restrictions, licensing standards, taxation, sports-integrity protections and, in some jurisdictions, tribal gaming interests.

For leagues and governing bodies, prediction markets introduce another regulated channel for trading on competition outcomes. The CFTC's proposed framework already recognizes the resulting integrity concerns and specifically contemplates information-sharing between exchanges, leagues, governing bodies and integrity units.

For athletes, coaches, officials and other insiders, increasingly granular markets create obvious information problems. A bet on who wins a championship is one thing. A contract concerning an injury, officiating decision or highly controllable in-game occurrence can create a much more direct opportunity for informational advantage—or manipulation.

And for consumers, the regulator matters because the rules surrounding access, responsible-gaming protections, disputes, trading restrictions and product availability may differ substantially between a state-licensed sportsbook and a federally regulated derivatives platform.

As of September 12, 2026, there is a genuine federal appellate split.

The Third Circuit's April decision in Flaherty favors the federal-market theory: sports-event contracts can qualify as swaps, and state gambling laws may be preempted when applied to them on a CFTC-regulated DCM.

The Ninth Circuit's August decision in Assad points the other way: Kalshi's sports contracts were not swaps, Rule 40.11 currently bars gaming contracts, and Nevada could continue applying its gaming regime.

Other cases remain in the pipeline. The Sixth Circuit, for example, heard argument on July 30 in Kalshi's challenge to Ohio regulators after previously denying an injunction pending appeal. The CFTC has appeared in that litigation supporting federal preemption.

Most importantly, New Jersey filed a petition for Supreme Court review on September 2 in Flaherty v. KalshiEX, No. 26-299. The petition remains pending; the Supreme Court has not agreed to hear the case as of September 12.

Three developments could reshape this area quickly.

First is the Supreme Court. The direct conflict between the Third and Ninth Circuits makes the federal-state jurisdictional question increasingly difficult to leave unresolved.

Second is the CFTC's Rule 40.11 rulemaking. A final rule could materially change the regulatory premise on which some of the current cases were decided—especially the Ninth Circuit's reliance on the existing categorical text.

Third is product design. The regulatory debate is already becoming more sophisticated than “sports contracts: yes or no.” The next dividing line may be between relatively broad, objectively settled markets—game winners, season outcomes and tournament advancement—and products involving injuries, officiating, individual acts, minors or other outcomes presenting greater integrity concerns.

That distinction may ultimately prove more important than the word “prediction market” itself.

Sometimes the economic experience can be extremely similar. Legally, however, a genuine CFTC-regulated event-contract exchange operates through a different market structure and invokes a different federal statutory regime. Whether that regime can lawfully encompass sports betting is now the subject of conflicting federal appellate decisions.

Do not assume so. Product availability currently depends on the platform, contract, jurisdiction, court orders and evolving regulatory positions. Federal preemption remains unsettled nationally.

Because Congress anticipated that event-based derivatives could overlap with subjects that raise public-interest concerns. The CEA therefore gives the CFTC special authority concerning contracts involving gaming and several other enumerated activities. The dispute is over how that authority interacts with the CFTC's broader derivatives jurisdiction and traditional state gambling regulation.

A sportsbook and a prediction market can offer economically similar propositions while invoking fundamentally different legal frameworks.

The sportsbook says: This is a wager, and the state licensed us to take it.

The prediction market says: This is a federally regulated event contract traded on a derivatives exchange, and the CFTC—not 50 state gambling regulators—controls the market.

The Third Circuit currently accepts that argument for sports contracts.

The Ninth Circuit currently does not.

And the CFTC is rewriting the regulatory framework while the Supreme Court is being asked to decide who has been right all along.

So the legal difference between a sportsbook and a prediction market cannot presently be reduced to odds versus contract prices, house versus exchange, or “bet” versus “trade.”

The real question is much bigger:

When money rides on the outcome of a game, who gets to decide whether the transaction is gambling or finance?

For now, there are two federal appellate answers.