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A New Legal Battle Over the Future of Prediction Markets
The rapidly expanding world of prediction markets has entered a far more uncertain chapter. On Friday, August 28, 2026, the U.S. Court of Appeals for the Ninth Circuit delivered a major setback to Kalshi by ruling that Nevada can move forward with oversight of its sports-related prediction contracts. The decision directly challenges the argument that federally regulated prediction markets are protected from state gambling laws.
The ruling is particularly important because it places two federal appellate courts on opposite sides of the same fundamental question: Are prediction-market contracts financial derivatives regulated exclusively by the federal government, or can states treat them as gambling and enforce their own gaming laws?
The answer could determine how platforms such as Kalshi and Polymarket operate across the United States for years to come.
The Ninth Circuit Delivers a Blow to Kalshi
A three-judge panel of the Ninth Circuit ruled unanimously that Kalshi was not entitled to an injunction preventing Nevada from applying its gaming regulations to the platform’s sports-event contracts. The court concluded that the Commodity Exchange Act likely does not preempt Nevada’s gaming laws in this context.
The decision represents a significant victory for Nevada regulators, who have argued that Kalshi’s sports contracts function substantially like conventional wagers rather than ordinary financial products.
For Kalshi, however, the distinction is fundamental. The company operates as a federally regulated designated contract market under the oversight of the U.S. Commodity Futures Trading Commission, and it has argued that its event contracts fall within the federal derivatives framework rather than state gambling regimes.
Nevadas Challenge Began With Kalshis Sports Markets
The dispute began after Nevada regulators objected to Kalshi’s event contracts. The Nevada Gaming Control Board sent the company a cease-and-desist letter in March 2025, arguing that its contracts amounted to wagering on sporting and other events and therefore constituted an unlicensed sports pool under Nevada law.
Kalshi responded by taking the dispute to federal court and seeking protection from state enforcement. A federal district court initially granted Kalshi a preliminary injunction, allowing the company to continue operating while the legal dispute moved forward.
Friday’s Ninth Circuit decision now changes the balance of power.
The Court Did Not Simply Declare Every Prediction Market Illegal
One important detail should not be lost in the headlines: the Ninth Circuit ruling did not establish that every prediction market is automatically gambling or that every Kalshi contract violates state law.
Instead, the court addressed whether Kalshi could prevent Nevada from exercising regulatory authority over its sports-event contracts while the broader legal dispute continues.
That distinction matters because the decision is primarily about regulatory jurisdiction and federal preemption. The deeper question of how different types of prediction contracts should ultimately be classified remains part of the larger legal battle.
The Federal Government and the States See Two Very Different Products
At the heart of the controversy is a disagreement over what prediction-market contracts actually are.
From Kalshi’s perspective, an event contract is a financial derivative whose price reflects the market’s assessment of whether a particular event will occur. The company argues that federal commodities law provides the governing framework and that states cannot simply impose their gambling laws on federally regulated exchanges.
State regulators see the situation differently.
When users put money behind whether a sports team will win, whether a particular score will occur, or whether another sporting event will produce a specified result, regulators argue that the practical experience looks remarkably similar to betting.
The legal fight therefore goes far beyond terminology.
The Numbers Make the Sports Question Especially Important
The Ninth Circuit opinion highlights how heavily Kalshi’s business has become tied to sports-related trading. According to the court’s opinion, more than 90% of Kalshi’s trades in 2025 were sports-related, accounting for approximately 95% of its revenue.
Those figures explain why state regulators are focusing so aggressively on sports contracts.
Prediction markets may have applications involving elections, weather, economics, entertainment and other events, but sports markets place them directly alongside an enormous and heavily regulated U.S. gambling industry.
That creates an unavoidable question: Can a product that looks and behaves like sports betting receive fundamentally different treatment simply because it is structured as a financial contract?
The Third Circuit Reached the Opposite Conclusion
The Ninth
In April 2026, the Third Circuit ruled in Kalshi’s favor in its dispute with New Jersey. That court held that the Commodity Exchange Act likely preempted New Jersey’s attempt to apply state gambling laws to Kalshi’s federally regulated sports-event contracts.
The Third Circuit concluded that Kalshi’s sports contracts were swaps traded on a CFTC-licensed designated contract market and therefore fell within the CFTC’s exclusive jurisdiction.
That decision represented a major victory for prediction markets.
The Ninth Circuit has now moved in the opposite direction.
A Federal Circuit Split Changes Everything
The disagreement between the Third and Ninth Circuits is more than a technical legal dispute.
When federal appellate courts reach conflicting conclusions on a major national issue, the pressure increases for the Supreme Court to eventually provide a definitive answer.
The current landscape now creates an unusual regulatory situation in which the legality and regulatory treatment of substantially similar prediction-market activities can depend on which federal appellate jurisdiction is involved.
That is precisely the kind of uncertainty businesses generally try to avoid.
Why the Supreme Court Could Become the Final Referee
The Supreme Court does not automatically hear every case involving conflicting appellate decisions, but a genuine circuit split on an issue affecting a rapidly expanding national industry can make Supreme Court review considerably more consequential.
The question is especially important because prediction markets operate across state borders through digital platforms.
A company cannot easily treat each state as an isolated financial market when users can access the same platform from different parts of the country.
If federal law provides exclusive authority, the regulatory model becomes largely national.
If states retain significant authority, prediction platforms could face a patchwork of licensing requirements, restrictions, taxes and enforcement policies.
Nevada’s Victory Could Encourage More State Enforcement
The immediate consequence of
Other states watching the litigation now have an appellate ruling they can point to when arguing that prediction markets should comply with state gambling laws.
That could encourage additional investigations, cease-and-desist orders and lawsuits against prediction platforms.
The states have effectively received another legal argument for their position.
Prediction Markets Have Become Too Large to Ignore
The legal fight is happening at a time when prediction markets are rapidly becoming more visible in American financial and media culture.
Kalshi has expanded beyond traditional economic and political event contracts into sports, weather and other markets. Recent reporting has also highlighted businesses using prediction-market contracts as unconventional hedging tools for weather-related risks.
That expansion makes the classification question increasingly complicated.
A platform can simultaneously look like a betting service to one user, a forecasting mechanism to another and a financial-risk tool to a business.
The law has not yet fully caught up with that hybrid model.
The Weather Market Shows Why the Debate Is Complicated
Weather contracts provide a useful example of why prediction markets cannot simply be reduced to sports betting.
Businesses can potentially use contracts tied to temperatures, weather conditions or other measurable events to offset financial risks.
A retailer exposed to unusually hot weather, an agricultural company affected by rainfall or an energy business affected by temperature changes may have legitimate economic reasons for wanting exposure to weather-related outcomes.
That is very different from placing a casual wager on which football team will win.
Yet both activities can exist on the same technological platform.
The Sports Expansion Creates the Biggest Regulatory Collision
Sports markets are where the distinction between financial derivatives and gambling becomes hardest to defend politically.
Traditional sportsbooks already operate under extensive state-level regulation.
States issue licenses, establish responsible-gambling requirements, impose taxes and determine which types of wagers can legally be offered.
Prediction markets entering the same commercial territory without following those rules naturally creates resistance from regulators and established gambling businesses.
The question is whether federal derivatives law changes that equation.
The Ninth
Friday’s ruling should not be interpreted as the final word on prediction markets.
The legal dispute remains active in multiple jurisdictions, and other appellate proceedings are relevant to the broader controversy. A Supreme Court battle remains possible if the circuit split persists.
The legal environment therefore remains fluid.
For prediction-market companies, the Ninth Circuit decision is a setback, but it is not necessarily the end of the road.
What This Means for Kalshi
Kalshi now faces a more difficult regulatory environment.
Its strategy has relied heavily on the argument that federal regulation creates a national framework that prevents states from imposing conflicting gambling rules.
The Ninth Circuit ruling weakens that argument, at least within its jurisdiction.
The company must now continue defending the proposition that its event contracts are fundamentally financial instruments rather than gambling products.
That distinction is becoming increasingly difficult as sports trading represents such a large portion of its business.
What This Means for Polymarket
The implications extend beyond Kalshi.
Polymarket has also become one of the most recognizable names in the prediction-market sector, particularly through political and event forecasting.
Although the precise legal circumstances surrounding each platform differ, the broader jurisdictional debate affects the entire industry.
If states gain broader authority to classify and regulate prediction markets as gambling, competing platforms could face similar regulatory pressure.
Why This Matters for Investors and Traders
For users, the issue is not merely academic.
Changes in regulatory authority can affect which markets are available, how platforms operate, where users can participate and what compliance requirements companies must implement.
A prediction market that is legal and accessible today could face restrictions tomorrow if a state regulator gains authority to intervene.
That makes regulatory risk one of the most important variables in the industry’s future.
The Tax Question Could Become Just as Important
State gambling regulation is not only about licensing.
Taxes are another major issue.
If prediction markets are classified as gambling activities, states could seek to impose gaming-related taxes and reporting obligations.
If they remain under the federal derivatives framework, the financial-market regulatory structure remains fundamentally different.
That potential revenue stream gives states an additional incentive to pursue the issue aggressively.
The Gambling Industry Has a Stake in the Outcome
Traditional sportsbooks and gaming companies also have an obvious interest in how courts resolve the dispute.
If prediction markets can offer sports contracts nationwide under federal financial regulation while sportsbooks remain subject to state licensing and taxation, the two industries could face dramatically different regulatory burdens despite offering products that consumers may perceive as similar.
That creates a competitive question as well as a constitutional and administrative one.
The
The Commodity Futures Trading Commission sits at the center of the dispute because Kalshi’s legal argument depends heavily on federal oversight.
The company maintains that its status as a CFTC-regulated designated contract market places its contracts within a federally controlled regulatory framework.
The states, however, argue that federal registration should not automatically prevent them from enforcing laws aimed at gambling activity occurring within their borders.
The ultimate legal question is therefore partly about the boundaries of federal power.
The Bigger Question Is Who Gets to Regulate the Internet
Prediction markets expose a regulatory problem that extends beyond gambling.
Digital platforms routinely operate across state boundaries.
One user can access a platform from Nevada while another accesses the same platform from New Jersey or California.
If every state can impose completely different rules on the same digital financial product, companies could face an increasingly fragmented regulatory system.
If federal law prevents state intervention, however, states may lose significant control over industries traditionally regulated within their borders.
A National Market Needs National Rules—or Clear State Boundaries
The United States has historically divided regulatory authority between federal and state governments.
Prediction markets are testing that division because they combine elements of finance, gambling, technology and forecasting.
The courts are now being asked to determine where that line should be drawn.
The Ninth Circuit has moved toward greater state authority.
The Third Circuit previously moved toward greater federal authority.
That contradiction is exactly why this legal battle is becoming so important.
Deep Analysis
The Central Legal Conflict
The central conflict is not simply whether prediction markets are “gambling.” It is whether states can regulate federally supervised financial contracts when those contracts resemble activities traditionally controlled by state gambling authorities.
Federal Preemption Is the Key
Kalshi’s strongest argument revolves around federal preemption. The company says Congress created a comprehensive federal framework for derivatives markets and gave the CFTC exclusive authority over designated contract markets.
States Have a Traditional Gambling Role
Nevada and other states counter with a powerful historical argument: gambling has traditionally been regulated at the state level. The Ninth Circuit’s decision gives that argument substantial weight in the current litigation.
The
Kalshi’s legal strategy depends partly on the structure of its contracts. The company describes them as financial instruments whose prices emerge through market activity rather than conventional wagers offered by a sportsbook.
The Consumer Experience Matters Too
Regulators focus on the other side of the equation. From a consumer’s perspective, buying a contract predicting a team’s victory can look remarkably similar to placing a sports wager.
Sports Created the Collision
The prediction-market industry might have faced less resistance if it had remained focused primarily on economic indicators, weather or other risk-management applications.
Sports changed the conversation.
Sports Markets Are Easy to Understand
A contract asking whether a team will win is simple for consumers to understand. That simplicity also makes it easier for regulators to argue that the product resembles gambling.
The Revenue Numbers Strengthen the State Argument
The Ninth Circuit’s discussion of Kalshi’s 2025 trading activity is particularly important because sports represented more than 90% of trades and approximately 95% of revenue.
The Financial-Derivative Argument Remains Powerful
At the same time, Kalshi is not operating as an ordinary unlicensed betting website. Its federal regulatory status provides a substantial legal foundation for its argument.
The Third Circuit Cannot Be Ignored
The Third Circuit already determined that federal law likely preempts New Jersey’s attempt to regulate Kalshi’s sports contracts.
The Ninth Circuit Has Created a Genuine Split
The conflicting decisions now create one of the most important legal developments in the prediction-market industry.
A Circuit Split Raises the Stakes
When appellate courts disagree over a national regulatory question, businesses cannot rely on one uniform legal interpretation.
State-by-State Regulation Could Become Expensive
If states ultimately prevail, prediction-market companies may need to evaluate licensing, taxation and market restrictions on a state-by-state basis.
Federal Exclusivity Would Produce the Opposite Result
If Kalshi ultimately wins the broader legal battle, prediction markets could operate under a predominantly national regulatory framework.
The Supreme Court May Eventually Have to Draw the Line
The Supreme Court is not required to resolve the issue simply because two circuits disagree, but the national significance of the dispute makes eventual Supreme Court involvement increasingly plausible.
The Industry Is Growing Faster Than the Legal Framework
Prediction markets have developed rapidly, leaving courts to apply decades-old financial and gambling concepts to products that did not previously exist in their current form.
Technology Is Blurring Traditional Categories
The same digital interface can now combine forecasting, financial trading, entertainment and speculative activity.
Regulation Will Shape the Business Model
The final legal outcome could influence whether prediction-market companies prioritize sports, financial hedging, political forecasting or other event-based contracts.
Sports Could Become the
The greater the
Weather Markets Provide a Stronger Financial Use Case
Weather contracts can demonstrate that prediction markets have legitimate risk-management applications beyond entertainment and gambling.
Businesses Are Starting to Explore Those Applications
Recent examples show companies experimenting with prediction-market contracts as unconventional hedging instruments.
That Could Strengthen the
If prediction markets develop substantial commercial uses unrelated to recreational betting, courts may have to consider a more nuanced regulatory model.
But Regulators Will Focus on Actual Market Activity
States are unlikely to ignore how consumers actually use these platforms simply because companies describe their products as derivatives.
The User Experience Could Influence Public Policy
If prediction markets increasingly resemble sportsbooks in appearance and functionality, lawmakers may respond even before courts reach a definitive conclusion.
Responsible-Gambling Rules Could Become a Flashpoint
State regulators may argue that prediction platforms should meet consumer-protection requirements similar to those imposed on traditional gambling companies.
Taxation Could Drive More Litigation
States stand to gain significant revenue if prediction-market activity becomes subject to gaming taxes.
Competitive Fairness Is Another Major Issue
Traditional sportsbooks could argue that prediction markets should not receive a regulatory advantage by operating under a different federal classification.
The CFTC Faces a Difficult Balancing Act
Federal regulators must determine how innovative event contracts can coexist with existing restrictions involving gaming and other potentially problematic markets.
The Industry Needs Regulatory Clarity
Regardless of which side ultimately wins, uncertainty is costly.
Investors Need Predictability
Businesses cannot confidently build long-term strategies if the legality of their core products can change dramatically from one jurisdiction to another.
Users Need Predictable Access
Customers also benefit from knowing where contracts are legal, what protections apply and how disputes are handled.
The Current Split Is Unsustainable Long Term
The Third and Ninth Circuit decisions cannot both provide the final nationwide answer.
More Appeals Are Likely
With several related legal proceedings still active, additional appellate decisions could further clarify or complicate the landscape.
The Sixth Circuit Matters Too
The broader litigation has also reached the Sixth Circuit, adding another potentially important voice to the developing national debate.
State Regulators Have Momentum
The Ninth Circuit decision gives states a powerful new precedent supporting their authority.
Prediction Platforms Still Have Strong Federal Arguments
The Third
The Final Battle Is Bigger Than Kalshi
The outcome could establish rules affecting the entire prediction-market sector.
Polymarket and Future Competitors Are Watching
Whatever courts ultimately decide could influence how future platforms structure contracts, select markets and enter individual states.
The
Prediction markets have already demonstrated strong commercial momentum. Their next major challenge may not be technological at all.
The Real Question Is Where Financial Markets End
The courts are effectively being asked to decide where a financial contract stops being a derivative and becomes gambling.
That Line Could Reshape an Entire Industry
A single legal definition could determine whether prediction markets become mainstream financial infrastructure or remain heavily constrained by state gaming regulations.
What Undercode Say:
The Ninth Circuit Decision Is a Warning Shot
The Ninth Circuit ruling should be viewed as one of the most consequential setbacks prediction markets have faced in the United States.
The Industry Cannot Ignore State Regulators
Even with federal licensing, prediction-market companies may have to take state enforcement threats much more seriously.
The Circuit Split Is the Biggest Development
The most important aspect of Friday’s decision is not simply that Kalshi lost in Nevada. It is that the decision conflicts with the Third Circuit’s earlier ruling.
Sports Markets Are the Pressure Point
Kalshi’s heavy exposure to sports makes it particularly vulnerable to arguments that its products resemble traditional betting.
Federal Licensing Is Not a Complete Shield
The ruling demonstrates that federal regulatory status does not necessarily eliminate every state-law challenge.
The Legal Definition Will Matter More Than the Branding
Calling an instrument an “event contract” does not automatically settle whether regulators or courts will treat it as gambling.
The Courts Are Looking at Substance
The legal battle is increasingly focused on what these contracts actually do and how consumers use them.
The Industry Needs a National Answer
A fragmented system could make it difficult for prediction markets to scale efficiently across the United States.
States Have Strong Political Incentives
Gambling regulation generates licensing fees, taxes and consumer-protection authority, giving states powerful reasons to defend their jurisdiction.
Traditional Sportsbooks Have a Competitive Interest
Sportsbooks are unlikely to welcome competitors that can offer similar products under a potentially lighter regulatory framework.
Prediction Markets Have a Genuine Financial Use Case
The
That Distinction Could Become Critical
Courts may eventually need to distinguish between contracts that function primarily as financial hedges and contracts designed primarily for entertainment-oriented wagering.
The Ninth Circuit Has Increased Supreme Court Pressure
The emerging circuit split makes a future Supreme Court review substantially more important.
More Litigation Is Almost Certain
The legal fight involves multiple states and courts, meaning Friday’s ruling is unlikely to be the last major judicial development.
The
Federal regulators will continue to play a central role in determining which contracts can operate as derivatives.
Congress Could Eventually Intervene
If courts continue producing conflicting interpretations, lawmakers could ultimately face pressure to clarify the relationship between federal derivatives law and state gambling regulations.
Regulation Could Become a Competitive Advantage
Companies that successfully navigate the legal landscape may emerge stronger than smaller competitors unable to absorb compliance costs.
Prediction Markets Could Become More Conservative
Platforms may begin avoiding certain categories of contracts that are especially likely to attract state enforcement.
Sports May Become More Difficult to Defend
The closer prediction markets move toward conventional sports betting, the stronger the states’ arguments become.
Non-Sports Markets Could Gain Importance
Political, economic, weather and other event contracts could become strategically more valuable if sports markets face increasing restrictions.
The
Friday’s ruling creates legal uncertainty, but it does not eliminate the underlying demand for event-based markets.
Consumer Interest Remains Strong
People are increasingly interested in markets that transform uncertainty into measurable probabilities and tradable positions.
Prediction Markets Are Becoming Part of Financial Culture
The sector is moving beyond its early niche status and into mainstream conversations about forecasting, risk and markets.
That Visibility Brings More Scrutiny
Greater adoption inevitably attracts regulators, lawmakers, competitors and courts.
The
The more prediction markets resemble mainstream sportsbooks and financial exchanges simultaneously, the more pressure regulators will face to determine exactly what they are.
The Legal Battle Could Define the Business Model
A favorable federal ruling could accelerate nationwide expansion, while stronger state authority could force a more fragmented approach.
Nevada Could Become a Turning Point
Because Nevada is synonymous with gambling regulation, its challenge carries unusual symbolic and practical significance.
The Third Circuit Victory Is Still Important
Kalshi’s April victory demonstrates that the company’s federal-preemption theory has already persuaded one federal appellate court.
Friday’s Loss Does Not Destroy That Argument
Instead, it makes the conflict between the competing legal theories much clearer.
The Supreme Court Question Is Now Harder to Avoid
If the split continues, the
The Outcome Could Affect Billions in Future Trading
As prediction-market volumes grow, the financial consequences of the regulatory framework will become increasingly significant.
Innovation Will Continue Regardless of the Court Fight
Technology is unlikely to stop developing while the legal system catches up.
The Most Successful Platforms Will Adapt
Companies that survive the regulatory uncertainty will likely be those capable of adjusting their products without abandoning their core market.
The Final Winner May Not Be Obvious Yet
Friday’s decision gives state regulators momentum, but the Third Circuit ruling provides prediction markets with an equally important federal precedent.
The Industry Is Entering Its Defining Legal Era
Prediction markets have spent years proving that consumers want these products. The next challenge is proving exactly what these products are under American law.
Legal Ruling
✅ Fact: The Ninth Circuit did rule on August 28, 2026, in KalshiEX LLC v. Assad, and a three-judge panel rejected Kalshi’s effort to block Nevada’s regulatory oversight of its sports-related prediction contracts.
Federal Circuit Split
✅ Fact: The article is correct that the Ninth Circuit’s position conflicts with the Third Circuit’s April 2026 decision, which held that New Jersey could not apply its gambling laws to Kalshi’s federally regulated sports contracts at the preliminary-injunction stage.
Supreme Court Status
⚠️ Partly confirmed: A Supreme Court review is a plausible consequence of the emerging circuit split, but it is not yet accurate to say the Supreme Court will definitely decide the issue. The Court would have to accept a case through its normal review process.
Prediction
(+1) Prediction Markets Will Keep Growing
(+1) Prediction markets are likely to continue expanding despite the legal uncertainty because consumer interest, institutional experimentation and new market categories are developing rapidly.
(+1) The Circuit Split Will Increase Pressure for National Clarity
(+1) With the Third and Ninth Circuits reaching conflicting conclusions, additional litigation is likely to push the federal government and possibly Congress toward a clearer nationwide regulatory framework.
(+1) Non-Sports Contracts Could Become More Important
(+1) If sports contracts remain the primary target of state regulators, prediction-market companies may increasingly emphasize weather, economics, financial indicators and other markets that have clearer risk-management applications.
(-1) State Enforcement Could Slow Expansion
(-1) If more states follow Nevada’s approach, prediction platforms could face higher compliance costs, market restrictions and uncertainty over where specific contracts can legally be offered.
(-1) A Patchwork Regulatory System Could Hurt Smaller Platforms
(-1) Smaller prediction-market companies may struggle to manage different licensing, taxation and compliance requirements across dozens of states, potentially strengthening the position of the largest platforms.
(+1) A Supreme Court Review Could Eventually Bring Clarity
(+1) If the circuit conflict persists, Supreme Court review could ultimately provide the national legal framework the industry currently lacks, although the timing and outcome remain uncertain.
Final Outlook
(+1) The prediction-market industry is unlikely to disappear because of one appellate ruling. Instead, Friday’s decision marks the beginning of a more consequential phase in which courts, regulators and lawmakers will determine whether event contracts belong primarily to the world of finance, gambling, or a new regulatory category somewhere between the two.
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