Bloomberg Found $200 Million in Suspicious Wagers on Kalshi and Polymarket. An Army Sergeant Has Already Been Indicted.
A Bloomberg investigation identified approximately $200 million in wagers on Kalshi and Polymarket between January and June 2026 displaying characteristics associated with potential insider trading — concentrated in geopolitical event markets. A federal indictment unsealed in April charged US Army Master Sergeant Gannon Ken Van Dyke with using classified information about Operation Absolute Resolve, the operation that captured Venezuelan President Nicolás Maduro, to generate $409,000 in profit. 57% of wallets with unusually successful returns were created within 24 hours of placing bets. The House Oversight Committee has launched a formal investigation.
A Bloomberg investigation published July 20 identified approximately $200 million in wagers on Kalshi and Polymarket between January and June 2026 that displayed characteristics associated with potential insider trading, with geopolitical event markets — including those covering tensions with Iran and political developments in Venezuela — accounting for a significant portion of the suspicious activity. The most striking detail in the dataset: 57% of wallets with unusually successful returns were created within 24 hours before placing the bets that generated those returns. Fresh accounts, consistently profitable, on markets tied to events that subsequently occurred — a pattern that analysts say is difficult to explain without access to non-public information.
The investigation has already produced a federal criminal case. A grand jury indictment unsealed on April 24, 2026, charges US Army Master Sergeant Gannon Ken Van Dyke with using classified intelligence about Operation Absolute Resolve — the operation that led to the capture of Venezuelan President Nicolás Maduro — to place wagers that generated more than $409,000 in profit. Van Dyke had access to mission-critical intelligence ahead of the operation and is alleged to have converted that foreknowledge into prediction market positions before the news was public. The case is the first federal criminal prosecution of a prediction market participant for insider trading and establishes that the conduct can be prosecuted under existing law — even though prediction markets did not exist when the insider trading statutes were written.
Both platforms say they have implemented screening measures. Kalshi now collects employment data from users in certain markets to identify prohibited participants, bars politicians from wagering on their own campaigns, and bars athletes from betting on markets tied to their own sports. But Bloomberg found that new evasion techniques are emerging faster than the platforms can counter them — fresh wallets, proxy accounts, and structuring bets across multiple accounts to stay below detection thresholds. The House Oversight Committee, led by Chairman James Comer, launched a formal investigation into insider trading on prediction market platforms following the Bloomberg report. The investigation follows directly from the House Agriculture Committee hearing on July 22, where integrity monitoring was a central issue, and from the Group of Copenhagen's report on the same day flagging the Polymarket market on Folarin Balogun's availability — which was opened before FIFA publicly confirmed his suspension had been lifted.
The insider trading problem is structurally different from the state-versus-federal regulatory dispute over sports event contracts. A state attorney general suing over sports gambling enforcement is a known quantity: courts can apply existing law, platforms can geofence, and the CFTC can preempt or not. Insider trading on geopolitical prediction markets is harder to contain. The markets that attracted the most suspicious activity are precisely the ones that generate the clearest information signal — which candidate will win, which operation will succeed, which policy will change — because they involve participants who may have access to information that markets cannot price. Whether prediction markets can solve that problem with technology, or whether regulators need to impose new rules, is now an open question at both the Justice Department and on Capitol Hill.
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An Independent Integrity Body Found 7 Betting Irregularities at the World Cup. FIFA Said There Were None. The Clash Centers on Polymarket.
The Group of Copenhagen — the Council of Europe's independent match manipulation watchdog — raised seven yellow notices for potential betting irregularities during the 2026 World Cup, in direct contradiction to FIFA's own Integrity Task Force, which published an all-clear on Tuesday. The most troubling finding involves Polymarket: the platform opened a market on July 2 asking whether Folarin Balogun would play against Belgium — the same day Balogun received a red card and three days before FIFA publicly confirmed his ban was suspended. No equivalent markets were opened for any of the other 14 red cards shown at the tournament.
After Yesterday's Hearing, Congress Looks Ready to Legislate on Prediction Markets — Not Just Watch
The House Agriculture Subcommittee held a two-hour hearing on July 22 examining sports event contracts, with witnesses from the American Gaming Association, tribal gaming, and both sides of the CFTC authority debate. Subcommittee Chair Dusty Johnson said Congress 'cannot afford to be silent' and signaled there is 'work for them to do.' Witnesses urged members to advance H.R. 7840, the Event Contract Enforcement Act, which would ban sports event contracts outright. The hearing adds a third front to a fight that is already being waged simultaneously in ten state courts and at the CFTC.
Congress Is Holding a Hearing on Whether Prediction Markets Are Sports Bets — With No Prediction Market Companies in the Room
The House Agriculture Committee will hold a hearing on Tuesday July 22 on the status of sports event contracts, featuring the American Gaming Association, tribal gaming interests, and former CFTC attorneys — but no representatives from Kalshi, Polymarket, or any other prediction market platform. The AGA will argue that sports event contracts are sports bets. Former CFTC counsel will defend the agency's authority. The hearing comes as the World Cup winner market on Kalshi hit a record $1.9 billion in total volume — more than double this year's Super Bowl.