TLDR
- A Wall Street Journal investigation found that over 60% of active UMA voters resolving Polymarket disputes could be linked to Polymarket accounts, raising conflict-of-interest concerns
- Nine connected Polymarket accounts allegedly made $2.4 million in profits with a 98% win rate betting on Iran-related military events
- A U.S. Army Special Forces soldier was federally charged for using classified information to place bets on prediction markets
- The New York Times identified more than 11,000 Polymarket accounts with suspicious betting patterns tied to military and political events
- Former SEC Chair Jay Clayton questioned whether prediction markets can maintain public confidence without stronger compliance infrastructure
Insider Trading Allegations Rock Prediction Markets
Prediction markets are under fire from multiple directions as new investigations expose problems with both trading activity and how disputes are settled on major platforms.
Over the past week, reports from the Wall Street Journal, CBS’s 60 Minutes, and the New York Times have each uncovered different issues facing the industry. The investigations cover insider trading, conflict-of-interest problems in dispute resolution, and a lack of basic compliance infrastructure.
The most alarming allegations involve trading tied to U.S. military operations. A U.S. Army Special Forces soldier was charged by federal prosecutors earlier this year for allegedly using classified information to profit from prediction market bets.
That case involved markets tied to the U.S. capture of Venezuelan President Nicolás Maduro. One newly opened account made more than $400,000 on wagers connected to the operation.
The problems extend beyond a single case. Blockchain analytics firm Bubblemaps told CBS that nine connected Polymarket accounts generated over $2.4 million in profits with a 98% win rate. Those bets were placed on developments tied to the Iran conflict, including U.S. strikes and ceasefire announcements.
Former CFTC official Rob Schwartz called it “a new kind of insider trading.”
The New York Times went even further. Its investigation identified more than 80 users with suspicious trading characteristics. The report said over 11,000 accounts showed patterns including well-timed long-shot wagers and unusually consistent profits.
CFTC enforcement director David Miller said prediction market insider trading has become “a real problem” with “serious consequences for market integrity and trust.”
Governance and Dispute Resolution Under the Microscope
The Wall Street Journal’s latest report shifted focus to a different problem. It examined how Polymarket resolves disputed bets.
Polymarket does not settle disputes internally. Instead, it uses a third-party service called UMA. Holders of UMA tokens vote on outcomes, and the more tokens someone holds, the more their vote counts.
The Journal found that more than 60% of active UMA voters could be linked to Polymarket accounts. Nearly one in five disputes involved at least one voter with a financial stake in the outcome. In most disputes, over 50% of votes were concentrated in the 10 largest wallets.
Critics told the Journal the system is “ripe for abuse.” There is nothing stopping token holders from voting on disputes where they have money on the line.
James Fry, a spokesman for Risk Labs, the foundation behind UMA, said it had never seen credible evidence of manipulation. Polymarket founder Shayne Coplan has previously called the dispute-resolution process “messy.”
Even centralized platforms have faced similar issues. Kalshi drew complaints from traders over how it resolved a Super Bowl novelty market involving Cardi B’s halftime appearance. Some users filed complaints with the CFTC.
The investigations also raised national security concerns. Investigators warned that unusual trading patterns could reveal military developments before they become public.
Former SEC Chair Jay Clayton questioned whether the industry can survive without better record-keeping. He said platforms need stronger compliance infrastructure to maintain public confidence.
Kalshi does not request employer information from users, unlike most stock brokerages. Polymarket’s international exchange, accessible to U.S. users via VPN, does not comply with U.S. laws requiring brokers to collect trader information.
Polymarket said it has implemented AI-powered surveillance and blockchain forensic tools. The company added that it is cooperating with law enforcement in investigations into suspicious trading activity.
Regulators and prosecutors have issued multiple information requests to both Polymarket and Kalshi regarding suspicious trading in political and military markets.
