Suspicious Betting Activity Found on Polymarket, Kalshi Before Poll Release
Researchers flagged well-timed wagers on two Senate races placed before a Times/Siena poll dropped, raising questions about possible insider access.
Researchers have identified suspicious trading activity on the prediction platforms Polymarket and Kalshi that preceded the release of a New York Times/Siena College poll covering two U.S. Senate races, according to a report by The New York Times.
A single trader appears to have placed well-timed bets on both platforms in the Senate contests shortly before the poll became public. The timing of the wagers drew scrutiny from researchers monitoring activity on the platforms, though investigators have not established definitively whether the individual had access to nonpublic polling data or simply made fortunate trades.
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The findings add to growing concern about the integrity of political prediction markets, which have surged in popularity ahead of recent U.S. elections. Critics and regulators have long warned that such platforms, which allow users to wager on electoral outcomes, could be vulnerable to manipulation by participants with privileged access to unreleased information.
Polymarket and Kalshi operate in a largely unregulated space for political event contracts in the United States, though both platforms have faced increased regulatory attention. Whether the trades in question violated any rules or laws remained unclear, and no formal enforcement action was reported in connection with this activity.
The episode underscores broader questions about oversight of prediction markets as they grow in scale and influence, with some analysts arguing that suspicious-trading surveillance mechanisms need to be strengthened before such platforms can be considered reliably transparent. Continue reading at NYT > Business.
