The European Securities and Markets Authority (ESMA) has recently turned its attention to two prominent prediction‑market platforms, Polymarket and Kalshi, questioning whether their operations can legally continue within the European Union. This scrutiny stems from a broader regulatory effort to ensure that novel financial products, especially those that blend elements of gambling, binary options, and crypto‑assets, are subject to appropriate oversight and consumer protection measures. In its latest statement, ESMA highlighted several legal frameworks that could potentially apply to the event‑based contracts offered by these platforms, raising concerns about gaps in authorization and the need for clearer regulatory guidance.
At the heart of ESMA’s inquiry is the classification of event contracts as binary options. Under EU law, binary options—financial instruments that pay out a fixed amount based on the occurrence of a specific event—have been largely prohibited for retail investors since the implementation of the 2018 ban. The ban was introduced to protect consumers from products that are often considered high‑risk and prone to misuse, given their all‑or‑nothing payoff structure.
ESMA’s preliminary assessment suggests that the contracts traded on Polymarket and Kalshi may fall within the definition of binary options, thereby potentially violating the ban unless a specific exemption or licensing regime applies. In addition to the binary‑options prohibition, ESMA referenced the Markets in Crypto‑Assets Regulation (MiCA), which came into force across the EU in 2024. MiCA establishes a comprehensive regulatory framework for crypto‑assets, including utility tokens, asset‑referenced tokens, and e‑money tokens.
While MiCA primarily targets digital assets that are not classified as securities, its broad scope also encompasses certain types of derivative contracts that are built on or settled in crypto‑assets. ESMA warned that if Polymarket’s or Kalshi’s event contracts are settled using cryptocurrencies, they could be subject to MiCA’s licensing requirements, including the need for a crypto‑asset service provider (CASP) licence and compliance with stringent transparency, capital, and governance standards. National gambling laws constitute another layer of regulatory scrutiny. Many EU member states maintain distinct legislation governing games of chance, betting, and other gambling activities.
Event‑based prediction markets, which allow users to wager on outcomes ranging from political elections to sports results, often straddle the line between financial speculation and gambling. If a platform’s primary function is deemed to be the provision of a gambling service rather than a regulated financial market, it may be required to obtain a gambling licence from the relevant national authority.
Failure to do so could result in enforcement actions, fines, or the forced cessation of operations within that jurisdiction. ESMA’s concerns are not merely theoretical. In recent months, several EU regulators have taken concrete steps against unlicensed binary‑option providers, issuing cease‑and‑desist orders and imposing penalties. The authority’s latest communication underscores the importance of a coordinated approach, urging national competent authorities to share information and collaborate on cross‑border investigations.
This collaborative stance is intended to close loopholes that could allow platforms to operate in a regulatory grey area by exploiting differences between financial, crypto, and gambling regimes. Polymarket, a US‑based prediction market that allows users to trade on a wide array of real‑world events, has historically positioned itself as a decentralized platform that leverages blockchain technology for settlement. Kalshi, on the other hand, is a regulated exchange in the United States that offers event contracts under the oversight of the Commodity Futures Trading Commission (CFTC).
Both companies have expressed interest in expanding into European markets, attracted by the region’s sizable user base and sophisticated financial infrastructure. However, ESMA’s warning signals that entry may require significant adjustments to their business models, including obtaining appropriate licences, implementing robust AML/KYC procedures, and possibly redesigning product offerings to comply with EU law. For market participants and potential users, the implications of ESMA’s assessment are multifaceted. Investors seeking exposure to event‑driven outcomes must now consider the regulatory status of the platforms they use, as non‑compliance could lead to sudden service interruptions or loss of funds.
Moreover, the heightened regulatory focus may drive innovation in the sector, prompting platforms to develop more transparent, compliant products that align with existing financial‑market standards. This could include the introduction of standardized contract specifications, clearer disclosure of risks, and the integration of third‑party custodians to safeguard assets. From a policy perspective, ESMA’s intervention highlights the challenges regulators face in keeping pace with rapid technological change.
The convergence of finance, technology, and gambling creates a complex landscape where traditional regulatory categories no longer suffice. As a result, policymakers are increasingly called upon to craft hybrid regulatory solutions that protect consumers without stifling innovation. The ongoing dialogue between ESMA, national authorities, and industry stakeholders will likely shape the future regulatory architecture for prediction markets in Europe.
In summary, ESMA has issued a formal warning to Polymarket and Kalshi, indicating that their event‑based contracts could be subject to existing EU bans on binary options, the MiCA crypto‑asset regime, or national gambling legislation. The authority stresses the importance of obtaining the necessary authorizations and adhering to consumer‑protection standards. While the exact outcome for these platforms remains uncertain, the message is clear: operating within the EU requires strict compliance with a mosaic of financial, crypto, and gambling regulations, and any gaps in licensing could result in enforcement actions. Companies aiming to serve European users must therefore undertake comprehensive legal reviews, engage with regulators early, and be prepared to adapt their product offerings to meet the rigorous standards set forth by ESMA and its national counterparts.