EU watchdog says prediction markets are rife with insider trading, flags reactive enforcement
The European Securities and Markets Authority said prediction markets are "rife with inside trading" in a risk monitor that gave the sector its own chapter, laying out three episodes that regulators say exposed core weaknesses in how these platforms operate. The report cited wallets that made $1.2 million hours before the February strike on Iran, with Bubblemaps later tracing nine linked accounts to $2.4 million in Iran-related bets that won 98% of the time. It also pointed to charges against a U.S. Army master sergeant over more than $400,000 in Polymarket profits tied to the capture of Venezuelan president Nicolás Maduro, and to a suspected attempt to tamper with weather sensors used to settle Polymarket contracts, which led Météo-France to file a police complaint. ESMA said platform responses are mostly reactive and often begin only after profits have already been taken. The regulator also argued that prediction markets have seen limited uptake in the European Union because of legal treatment under MiFID II, MiCA, and national gambling laws. It noted that Kalshi and Polymarket restrict users in some EU countries but not all, while the effectiveness of VPN bans remains uncertain. The report also highlighted rising volumes, concentrated gains, and sharp differences between Europe and Washington over how event contracts should be regulated.








