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ESMA Flags Insider Trading and Retail Risks in Prediction Markets

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Altay
Altay Celikkaya
Content Manager
Updated:
Reading Time: 3 minutes

The European Securities and Markets Authority has warned that the rapid growth of prediction markets is creating fresh risks for investors and market integrity. In its 10 September 2026 risk monitoring report, the EU regulator examined event contracts linked to outcomes ranging from sports results to political and economic developments. ESMA focused on how pseudonymous trading, uneven access to information and uncertain oversight can affect these markets. The assessment matters to gambling operators, trading platforms and data providers.

ESMA logo on a white panel against a blue background with flowing mint and turquoise lines.

Regulation & Compliance

Key Takeaways for Prediction Market Operators

  • ESMA identified insider trading, market manipulation and potential retail losses as central concerns as prediction markets expand.

  • EU treatment depends on each contract’s characteristics, with financial, crypto-asset and national gambling rules potentially applying.

  • Firms need to assess product classification, authorisation, customer access and market surveillance before offering event contracts in Europe.

Pseudonymous Trading Complicates Market Surveillance

Prediction markets allow participants to trade contracts that pay according to whether a future event occurs. ESMA acknowledged that their prices can offer useful, continuously updated signals about expectations. But a forecast becomes less reliable when participants can trade on confidential information, manipulate the underlying event or distort the data used to settle a contract. Its data put fourth-quarter 2025 trading at roughly $8.8 billion on Kalshi and $12 billion on Polymarket.

ESMA said,

Market manipulation and insider trading risks reach new levels in the context of prediction markets.

Its report highlights particular difficulties on blockchain-based platforms, where users may trade through pseudonymous wallets or operate several accounts. That complicates detection of wash trading, coordinated activity and bets placed with advance knowledge.

The regulator cited reported suspicious profits ahead of the February 2026 strikes on Iran and a US criminal case involving alleged use of classified information to bet on events in Venezuela. These allegations show why operators need timely monitoring and clear investigation procedures. Earlier market integrity measures introduced by Kalshi and Polymarket illustrate the industry’s efforts to address that concern.

Retail Exposure Extends Beyond Trading Losses

ESMA also raised questions about what consumers encounter when prediction markets resemble gambling products but are accessed without the protections attached to authorised EU financial services. Simple yes-or-no contracts can appear easy to understand, even when pricing, settlement terms and counterparties require closer scrutiny. Social media promotion and game-like interfaces may encourage frequent trading by inexperienced users.

The report points to risks of financial loss, addictive behaviour and disadvantage against professional or algorithmic traders with better information and technology. It also identifies contract resolution as a separate weakness. A poorly defined event, unreliable data feed or opaque settlement decision can affect who receives a payout, regardless of whether trading itself was fair.

For businesses, those findings bring customer protection and operational controls into the same discussion as growth. Product teams need clear contract wording and dependable data sources, while compliance teams need ways to review suspicious activity and resolve disputes. A blockchain record does not remove those risks.

EU Rules Depend on the Contract

ESMA’s September report is a risk assessment, not a new blanket prohibition on prediction markets. The regulatory position depends on what an event contract references and how it is structured. Some contracts qualify as financial instruments under MiFID II. Others based on distributed ledger technology may fall under the EU’s crypto-asset framework when they are not financial instruments. National gambling law can also apply.

Where a contract is a financial instrument with a binary payout, existing national measures on binary options can prohibit its marketing, distribution or sale to retail clients. ESMA set out that position in its earlier guidance on binary event contracts. The regulator also says that offering investment services involving qualifying contracts in the EU requires investment firm authorisation, including when distribution is limited to professional clients.

European gambling authorities have examined the same activity from a different angle. A joint warning from nine gambling regulators focused on licensing and consumer safeguards for platforms serving their national markets. Firms cannot determine obligations from a product label alone. Each contract, target jurisdiction and distribution channel needs its own assessment.

ESMA noted that major platforms restrict users in some EU countries, but questioned why those restrictions do not cover every member state and whether controls against virtual private network access work in practice. For operators and partners, the immediate issue is therefore practical. They must know which customers can access a product, which authority oversees it and whether their controls can support that position.