The European Securities and Markets Authority (ESMA) has recently turned its attention to two prominent prediction‑market platforms, Polymarket and Kalshi, questioning the legality of their operations within the European Union. The regulator’s concerns centre on whether the event‑based contracts offered by these services fall under existing prohibitions on binary options, the newly introduced Markets in Crypto‑Assets (MiCA) framework, or the diverse national gambling statutes that member states enforce. At the heart of ESMA’s inquiry is the definition of a binary option under EU law.
Historically, binary options have been banned across the bloc because they are considered high‑risk financial instruments that can be easily misused for speculative gambling. The ban, which was reinforced after a series of scandals involving retail investors, prohibits the offering, marketing, or distribution of contracts that pay a fixed amount based on a yes‑or‑no outcome. Polymarket and Kalshi both provide contracts that settle on the occurrence of specific events – ranging from political outcomes to sports results – and these settlements are typically binary in nature: the contract either pays out a predetermined sum if the event occurs, or it expires worthless if it does not.
This structural similarity raises the question of whether the platforms are, in effect, operating binary options without the required authorisation. Complicating the picture is the European Union’s recent adoption of the Markets in Crypto‑Assets Regulation (MiCA), which establishes a comprehensive regime for crypto‑related tokens and services. While MiCA primarily targets crypto‑assets that function as currencies, utility tokens, or stablecoins, it also includes provisions for “financial instruments” that are issued on distributed ledger technology. ESMA has indicated that certain event contracts could be classified as crypto‑assets under MiCA if they are tokenised and settled on a blockchain.
In such a scenario, the platforms would need to obtain a crypto‑asset service provider licence, comply with stringent consumer‑protection requirements, and adhere to anti‑money‑laundering (AML) obligations. The regulator’s warning suggests that, without a clear licensing pathway, Polymarket and Kalshi might be operating in a legal vacuum. National gambling laws add another layer of complexity. Each EU member state maintains its own regulatory framework for gambling activities, which often includes licensing regimes for betting, lotteries, and other games of chance.
Event‑based contracts that resemble betting on real‑world outcomes can be interpreted as gambling products, especially when the settlement is based purely on the occurrence of an external event rather than on underlying financial market movements. Consequently, the platforms could be required to secure gambling licences in each jurisdiction where they have users, a requirement that would be both costly and administratively burdensome. ESMA’s public statement underscores the need for clarity.
The authority has called on both Polymarket and Kalshi to provide detailed information about their product structures, the technology used for settlement, and the jurisdictions in which they intend to operate. The regulator is also urging national authorities to coordinate their efforts, ensuring that there is no regulatory arbitrage where a platform could exploit gaps between financial, crypto‑asset, and gambling regimes. The implications of ESMA’s scrutiny are significant for the broader prediction‑market industry. If the regulator determines that event contracts are indeed subject to the binary‑options ban, platforms would have to redesign their products to avoid a binary payoff structure, perhaps by offering multi‑outcome contracts or by incorporating a price‑based settlement mechanism similar to traditional derivatives.
Alternatively, if the contracts are deemed crypto‑assets, firms would need to align with MiCA’s licensing and compliance framework, which includes capital requirements, governance standards, and robust consumer‑disclosure obligations. From a market‑participant perspective, the uncertainty may affect user confidence. Traders who have been using Polymarket and Kalshi for speculative purposes might face the prospect of losing access to these platforms or having their positions liquidated if the services are forced to cease operations pending regulatory approval. Conversely, a clear regulatory pathway could legitimize prediction markets, attracting institutional investors who have been wary of the legal ambiguities.
In response to the regulator’s concerns, both Polymarket and Kalshi have issued statements affirming their commitment to compliance. They argue that their contracts are not traditional binary options because they are settled on a decentralized ledger and provide transparency that traditional binary‑option products lack. They also highlight that their platforms incorporate robust KYC/AML procedures and that they are exploring the possibility of obtaining the necessary licences under existing frameworks.
The broader debate touches on the evolving nature of financial innovation. Prediction markets blur the lines between gambling, speculation, and legitimate risk‑management tools. As technology enables more granular and real‑time betting on a wide array of outcomes, regulators worldwide are grappling with how to fit these products into existing legal categories. The EU’s approach, as signalled by ESMA, appears to favour a cautious stance: ensuring that consumer protection and market integrity are not compromised while still allowing room for innovation under clearly defined regulatory conditions.
Looking ahead, stakeholders can expect a period of dialogue between the platforms, national regulators, and ESMA. Potential outcomes include the issuance of specific guidance on how event‑based contracts should be classified, the creation of a harmonised licensing regime that bridges the gap between financial and gambling regulations, or the imposition of stricter bans that limit the availability of such products to professional or institutional users only.
In any case, the situation serves as a reminder that emerging fintech services must proactively engage with regulators early in their development cycles. By aligning product design with regulatory expectations—whether that means adjusting payout structures, securing appropriate licences, or enhancing transparency—companies can mitigate the risk of abrupt market interruptions and foster a sustainable environment for innovative financial products within the EU.