Polymarket investigates suspicious bets placed before NYT/Siena poll release

Polymarket is investigating suspicious trading activity that occurred shortly before the publication of two New York Times/Siena College political polls. According to a report involving Vanderbilt University researchers, a user placed a wager of nearly $200,000 on October 31 regarding the re-election of Nebraska Senator Pete Ricketts. Approximately one hour later, the New York Times released a poll showing Ricketts in the lead. The bettor reportedly earned more than $77,000 from the trade.

The timing of these large bets has raised concerns regarding whether the participant had access to nonpublic, embargoed information. While the Vanderbilt report noted similar large-scale activity on other prediction markets like Kalshi, Polymarket has confirmed it detected the trades and is conducting an investigation. No specific individuals or entities have been conclusively linked to a leak of the polling data at this time.