The European Securities and Markets Authority (ESMA) is targeting platforms like Polymarket and Kalshi because it believes these prediction markets are "rife with inside trading" and lack the oversight necessary to protect retail participants. In a scathing report released in early 2026, the regulator specifically highlighted that the absence of traditional market surveillance allows participants with non-public information to profit at the expense of others, undermining the integrity of these decentralized protocols.
Beyond the manipulation concerns, ESMA questioned the inconsistent compliance strategies used by these platforms. The regulator pointed out that while Kalshi and Polymarket block certain EU member states, they allow access to others without a clear legal rationale. Furthermore, ESMA noted that existing geographic restrictions are effectively useless because users consistently employ VPNs to circumvent blocks, an issue the regulator claims the platforms are not doing enough to prevent.
This move comes as the European Union looks to refine its Markets in Crypto-Assets (MiCA) framework to better address the nuances of decentralized finance (DeFi) and prediction-based derivatives. By focusing on the "VPN workaround," ESMA is signaling that simple IP-based blocking will no longer be considered sufficient compliance. This could force prediction markets to implement mandatory, robust Know Your Customer (KYC) protocols, which could alienate users who prioritize privacy.
For the broader crypto market, this regulatory pressure is bearish for the prediction market sector, as increased compliance costs and potential fines may lead to a liquidity exodus. Investors should watch for upcoming ESMA guidelines that may officially reclassify prediction market contracts as regulated financial instruments, which would require these platforms to obtain full brokerage licenses to continue operating within the European Economic Area.