Polymarket and Kalshi strengthen anti-fraud measures amid World Cup trading surge
Polymarket and Kalshi are boosting anti-fraud efforts as World Cup trading drives higher volumes and fraud incidents, according to reports. The measures come as overall World Cup event-contract volume has topped $2 billion across the two platforms, with Polymarket's 24-hour revenue reaching $1.18 million to pass Hyperliquid during the tournament. Kalshi's revenue has reached $1.5 billion. Reuters carried The Information's report on the anti-fraud steps but noted it has not verified the story. No further details on the specific measures or the nature of the fraud rings were provided in the available material.
Fraud clampdowns during peak World Cup liquidity risk rejecting legitimate flow at the exact moment Polymarket and Kalshi are racing to retain the institutional market makers that now underpin their spreads. Any false-positive rate that spooks DRW, Wintermute and IMC desks would cede volume to rivals.
Adds the DRW, Wintermute and IMC market-making buildout to growing moves by prediction market venues — including Robinhood's Rothera test and Polymarket's record World Cup revenue — to lock in institutional liquidity as event-contract volume surges.