The European Securities and Markets Authority (ESMA) has recently turned its attention to two prominent U.S.-based prediction‑market platforms, Polymarket and Kalshi, as they explore the possibility of offering their services to customers within the European Union. While both companies have built sizable user bases by allowing participants to trade on the outcomes of real‑world events—from political elections to sports results—their business models raise a number of regulatory questions under the EU’s existing legal framework.
ESMA’s recent statement underscores the complexity of fitting these novel financial products into the current mosaic of rules that govern binary options, crypto‑assets, and gambling activities. **Why ESMA is concerned** At the heart of the regulator’s apprehension is the classification of “event contracts,” the core product offered by Polymarket and Kalshi. These contracts are essentially binary wagers: a trader either receives a predetermined payout if a specific event occurs, or loses the stake if it does not. This structure mirrors that of traditional binary options, which have been subject to a blanket ban across the EU since 2018 due to concerns about investor protection, market manipulation, and the high risk of loss for retail participants.
The ban was codified in the European Commission’s Directive on Markets in Financial Instruments (MiFID II) and reinforced by national authorities that view binary options as overly speculative and prone to fraud. In addition to the binary‑options prohibition, the EU is on the cusp of implementing the Markets in Crypto‑Assets Regulation (MiCA), a comprehensive regime that will bring many crypto‑related products under a harmonised supervisory umbrella. MiCA defines “crypto‑assets” broadly, covering tokens that grant rights to a future payoff, which could arguably include event contracts if they are tokenised on a blockchain. Should Polymarket or Kalshi decide to issue their contracts as digital tokens, they may fall squarely within MiCA’s scope, obligating them to obtain a crypto‑asset service provider licence, implement robust AML/KYC procedures, and adhere to strict disclosure requirements.
Finally, each EU member state retains its own gambling legislation, which often treats prediction markets as a form of betting rather than a financial instrument. In countries such as France, Germany, and Italy, gambling operators must secure specific licences and comply with advertising, responsible‑gaming, and consumer‑protection rules.
If event contracts are deemed gambling products, Polymarket and Kalshi would need to navigate a patchwork of national licensing regimes, potentially facing divergent standards and hefty compliance costs. **The authorization gap** ESMA’s warning points to a “gap” in the current regulatory architecture: there is no single, clear‑cut category that neatly captures the hybrid nature of event‑based prediction contracts. On one hand, they exhibit financial characteristics—traders allocate capital, seek profit, and the contracts are settled in fiat or stable‑coin currencies.
On the other hand, they possess gambling‑like attributes, such as a binary outcome and a reliance on real‑world events that are often beyond the control of the platform. This ambiguity creates uncertainty for both providers and investors, as firms may inadvertently breach one set of rules while believing they are compliant with another.
To address this, ESMA has called on national competent authorities to examine existing licences—whether for binary‑options trading, crypto‑asset services, or gambling—and assess whether they can be extended to cover prediction‑market platforms. The regulator also hinted at the possibility of drafting specific guidance or even a dedicated legislative amendment to close the loophole.
Until such clarity is achieved, Polymarket and Kalshi risk operating in a legal grey area that could expose them to enforcement actions, fines, or forced cessation of services. **Implications for market participants** For European users, the regulator’s stance signals a need for caution.
While prediction markets can offer valuable insights—aggregating dispersed information about future events—and serve as a hedge against uncertainty, they also carry substantial risk. Retail traders may be lured by the simplicity of a “yes/no” payoff, yet the underlying volatility and the potential for manipulation (e.g., coordinated misinformation campaigns) remain significant concerns.
ESMA’s emphasis on investor protection suggests that any future licensing framework will likely impose strict suitability assessments, caps on exposure, and mandatory risk warnings. Moreover, the potential classification under MiCA could bring additional safeguards, such as transparency about the underlying algorithm, clear disclosure of fees, and the requirement to hold client assets in segregated accounts.
These measures would align prediction‑market platforms with the broader EU ambition to create a safer, more transparent digital‑asset ecosystem. **What the companies can do** Polymarket and Kalshi, aware of the regulatory scrutiny, can take proactive steps to align their operations with EU expectations. First, they could engage in a dialogue with ESMA and national regulators to clarify the applicable licensing path.
Second, they might consider restructuring their products to resemble traditional financial derivatives—such as futures or options with more granular payoff structures—thereby fitting more comfortably within existing financial‑instrument regimes. Third, if they opt for a token‑based model, obtaining a MiCA licence early could pre‑empt future compliance hurdles. Additionally, implementing robust internal controls—enhanced know‑your‑customer (KYC) procedures, anti‑money‑laundering (AML) monitoring, and real‑time market surveillance—would demonstrate a commitment to consumer protection and could sway regulators toward a more favourable assessment.
Transparent communication with users about the risks, the legal status of the contracts, and the steps taken to mitigate potential abuse would further build trust. **Looking ahead** The EU’s regulatory landscape is evolving rapidly, driven by the twin goals of fostering innovation and safeguarding market participants. ESMA’s recent remarks on Polymarket and Kalshi serve as a bellwether for how prediction‑market platforms will be treated across the bloc.
Whether the outcome will be a harmonised licensing regime that accommodates these hybrid products, or a stricter prohibition that aligns them with existing binary‑options bans, remains to be seen. What is clear, however, is that the convergence of finance, technology, and gambling law will require coordinated action from regulators, industry players, and policymakers.
Stakeholders must balance the promise of prediction markets—enhanced price discovery, crowd‑sourced forecasting, and new avenues for risk management—against the imperative to protect consumers from undue loss and potential market abuse. In the meantime, European investors should stay informed about the regulatory developments and assess their exposure carefully.
As ESMA continues its review, the coming months are likely to bring further guidance, possible amendments to MiCA, and perhaps even a dedicated EU directive that explicitly addresses event‑based contracts. Until such clarity is achieved, both providers and participants should proceed with prudence, ensuring that any engagement with prediction markets complies with the highest standards of transparency, fairness, and legal conformity.