Europe is sending a powerful message to the fast-growing prediction-market industry: innovation can move quickly, but regulation is not going to stand still.
The latest warning from the European Securities and Markets Authority, or ESMA, puts platforms such as Polymarket and Kalshi under a much brighter regulatory spotlight. Rather than simply treating prediction markets as a new form of online betting, European regulators are examining whether some event contracts should be treated as financial products that require authorization.
At first glance, that sounds like bad news for the industry. But there is another, more constructive way to look at it: Europe may be forcing prediction markets to mature.
What Is Happening With Polymarket and Kalshi in Europe?
ESMA's September 10, 2026 risk assessment says major prediction-market platforms do not currently have the authorization generally required to market and sell relevant event contracts to EU users. The regulator's approach depends heavily on what the contract represents, how it is structured, and which legal framework applies.
That distinction matters. A prediction market is not automatically one single type of financial product. Depending on the underlying event and structure, an event contract can potentially interact with rules covering binary options, crypto assets, financial instruments, or national gambling laws.
That is why the European debate is becoming much bigger than simply asking whether Polymarket or Kalshi should be allowed.
Why Europe Is Taking a Harder Look
Prediction markets have grown dramatically since the 2024 U.S. presidential election, turning event probabilities into tradable markets that can attract enormous amounts of money.
According to the source analysis, Kalshi recorded roughly $8.8 billion in volume during the fourth quarter of 2025, while Polymarket recorded about $12 billion over the same period. That combined activity shows why regulators can no longer treat the sector as a niche experiment.
The platforms are also evolving in different directions. Kalshi operates as a centralized exchange regulated in the United States by the Commodity Futures Trading Commission, while Polymarket combines prediction-market trading with blockchain-based settlement and crypto infrastructure.
That difference makes regulation more complicated—but it also makes the European market an important testing ground for what prediction markets could eventually become.
The Three Regulatory Paths Europe Is Watching
One of the most important parts of the current debate is that European regulators are not necessarily placing every prediction contract into one universal category.
1. Financial contracts and binary options
If an event contract is linked to a financial variable, European rules may treat it as a binary option. Retail sales of binary options have faced strict restrictions in the EU because of the substantial losses associated with these products.
2. Crypto and MiCA
Some blockchain-based prediction products may instead interact with the European Union's Markets in Crypto-Assets framework, commonly known as MiCA, depending on their structure and whether they qualify as crypto assets rather than financial instruments.
3. National gambling laws
Contracts that do not fall under financial or crypto-asset rules may come under national gambling legislation. This is where Europe's fragmented regulatory system becomes particularly important.
A product available in one European country may therefore face completely different treatment somewhere else. That creates a difficult operating environment for global prediction-market companies.
Europe's Biggest Challenge May Actually Be Fragmentation
The interesting part of this story is that Europe does not necessarily have to choose between innovation and consumer protection.
The bigger challenge is creating a framework that is clear enough for legitimate companies to understand what they can offer, while still protecting consumers from poorly designed or excessively speculative products.
Several European jurisdictions have already taken restrictive positions. France ordered internet providers to block Polymarket in 2026, while other European markets have introduced restrictions or enforcement measures involving prediction-market activity.
This fragmented landscape could eventually push the industry toward something positive: clearer licensing standards.
Why This Could Be Good for Prediction Markets
Regulation is often presented as the enemy of innovation. In financial markets, however, clear rules can sometimes have the opposite effect.
When investors know who is licensed, how customer funds are handled, what identity checks are required, how markets are monitored, and what happens during disputes, confidence can improve.
That could become particularly important for prediction markets because the industry is moving beyond elections and internet speculation. Event-based contracts are increasingly attracting professional traders, institutions, financial companies, and data businesses.
Reuters reported on September 10 that Polymarket had appointed former Amazon, Electronic Arts, Delta Air Lines and Nielsen executive Warren Jenson as its first chief financial officer. The move is another sign that the company is thinking about prediction markets as a major financial business rather than a short-lived crypto trend.
The Numbers Show Why This Industry Is Getting Serious
The growth story is difficult to ignore.
Polymarket and Kalshi together generated approximately $48.4 billion in trading volume during August 2026, according to Reuters, with Kalshi accounting for the larger share at around $40 billion. Polymarket is also building a broader institutional strategy as competition intensifies.
Kalshi has also reported rapid expansion beyond politics and sports. Its monthly commodities trading volume surpassed $400 million just seven months after launch, highlighting how quickly prediction-market infrastructure is moving toward broader financial applications.
That is precisely why European regulators are paying attention now rather than waiting several more years.
Prediction Markets Are Moving Closer to Traditional Finance
Perhaps the most important development is happening outside Polymarket and Kalshi themselves.
Traditional financial institutions and exchanges are increasingly experimenting with event-based products and prediction-market data. The boundaries between betting, trading, derivatives, alternative data and financial forecasting are becoming less obvious.
That creates a huge opportunity—but also creates a responsibility to establish clear market rules.
In my view, this is where Europe's approach could eventually prove valuable. A slower regulatory process may frustrate companies in the short term, but a well-designed framework could give institutional investors more confidence in the long term.
Why Prediction Markets Are Different From Polls
There is another important issue that deserves more attention: prediction-market prices are not the same thing as objective probabilities.
A market price reflects the behavior of people willing to put money behind an outcome. That can produce useful information, but it can also be influenced by concentrated trading, liquidity, news shocks, large investors and strategic behavior.
Recent academic research examining Polymarket trading found that large price movements can receive significantly more attention from news coverage afterward. That matters because a market move can influence public perception even when the move itself is not necessarily proof that the underlying probability has fundamentally changed.
This is one reason responsible regulation could be beneficial. Consumers need to understand that a prediction-market percentage is a market signal—not a guaranteed forecast.
The Bigger Risk: Insider Information and Market Integrity
ESMA's concerns go beyond licensing.
Prediction markets can involve events where a small group of people may have information before the wider public. When money can be made from correctly anticipating an event, the possibility of insider trading or market manipulation becomes a serious question.
European regulators have specifically highlighted these concerns as prediction markets become more popular and more closely connected with financial markets.
The answer does not have to be shutting down the entire industry. Better identity verification, market surveillance, position limits, transparent contract rules and stronger enforcement could create a much healthier ecosystem.
Could Europe Eventually Build a Better Prediction-Market Model?
Absolutely—and that may be the most interesting possibility in this entire story.
Instead of viewing prediction markets as either gambling or finance, regulators could eventually develop rules based on the specific characteristics of each product.
A political event contract, a sports contract, a macroeconomic contract and a crypto-linked contract do not necessarily carry identical risks. Treating them differently could allow useful forms of forecasting to develop while limiting the products most likely to create consumer harm.
That kind of framework could also encourage serious companies to seek licenses rather than operating around regulatory gaps.
What This Means for Polymarket and Kalshi
For Polymarket and Kalshi, the European challenge is now much more strategic than simply getting around individual country restrictions.
They will need to demonstrate that their licensing strategy, geographic controls, customer verification, market surveillance and contract structures are appropriate for the jurisdictions where they want to operate.
That could increase costs in the short term, but it could also create a stronger foundation for international expansion.
Kalshi is already dealing with a complicated regulatory environment in the United States, where courts and regulators continue to debate the boundary between federally regulated prediction contracts and state gambling oversight. A recent federal appeals court ruling said Nevada could regulate Kalshi's sports-related prediction markets, adding another layer to the U.S. legal debate.
What Happens Next?
The most likely outcome is not the disappearance of prediction markets. The industry has already grown too large and attracted too much institutional attention for that to be the simplest conclusion.
Instead, the next phase is likely to be a battle over classification, licensing and market design.
Europe may continue restricting certain products while creating clearer pathways for others. The United Kingdom is also reviewing its approach to U.S.-style prediction markets, showing that the regulatory debate is not limited to the EU.
The winning platforms may ultimately be the ones that can prove they are not merely good at attracting traders, but also good at operating responsibly under financial-market standards.
Bottom Line: A Regulatory Reset Could Make Prediction Markets Stronger
Europe's tougher stance on Polymarket and Kalshi looks dramatic, but it could become a turning point rather than a dead end.
The prediction-market industry is entering a more mature phase. Huge trading volumes, institutional interest, crypto infrastructure and mainstream financial participation have made the old regulatory gray areas increasingly difficult to maintain.
The positive opportunity is clear: if regulators can establish transparent rules without eliminating useful innovation, prediction markets could evolve into a more credible part of the global financial-information ecosystem.
For Polymarket and Kalshi, the message from Europe is simple: growth is welcome, but the next stage of growth will require trust, transparency and compliance.
Frequently Asked Questions
Is Polymarket legal in Europe?
Polymarket's legal status varies by country. Several European jurisdictions have blocked or restricted access, while other countries are developing or interpreting their own regulatory frameworks.
Is Kalshi legal in Europe?
Kalshi also faces country-specific restrictions and authorization requirements. There is no single EU-wide license that automatically allows the platform to operate throughout Europe.
Why is ESMA concerned about prediction markets?
ESMA is concerned about authorization, investor protection, market integrity, insider trading, consumer risk and the classification of event contracts under existing European financial rules.
Are prediction markets the same as sports betting?
Not necessarily. Prediction markets may use financial-style contracts, while sports betting traditionally operates under gambling rules. However, the legal distinction can vary depending on the product and jurisdiction.
Could prediction markets still grow in Europe?
Yes. Clearer regulation could eventually support growth by giving consumers, institutions and companies greater certainty about how prediction markets can legally operate.
What should investors understand about prediction-market odds?
A prediction-market price represents a market-based expectation, not a guaranteed outcome or scientific probability. Prices can move because of new information, liquidity changes, large trades or market sentiment.
Final Takeaway
Europe is not simply closing the door on prediction markets. It is deciding what kind of door should exist.
That distinction could define the industry's next decade. If Polymarket, Kalshi and future competitors can combine innovation with stronger consumer protection and transparent regulation, today's regulatory pressure could ultimately become the foundation for a much more credible global prediction-market industry.
