Suspicious Trades Spotted in US Midterm Prediction Market; $200,000 Bet Placed Just Before Poll Release
Summary
- Vanderbilt University researchers said a $200,000 bet was detected on Polymarket one hour before a poll release.
- The user placed $200,000 and $622,600 wagers on the Nebraska and Michigan Senate races, respectively, and made a $77,000 profit.
- The researchers said repeated large bets placed just before poll releases were fueling suspicions that nonpublic information may have been used, and that further investigation was needed.
Forecast Trend Report by Period
Large bets were placed in a prediction market just before the release of polling results related to the US midterm elections.
The New York Times reported on November 7 that researchers at Vanderbilt University, after analyzing Polymarket data, found that one user wagered about $200,000 on Nebraska Senator Pete Ricketts winning reelection roughly an hour before a poll was released.
The user is reported to have made a profit of $77,000 on that trade.
The same user made a similar trade in Michigan's Senate race. On October 31, the user bet about $622,600 on Democratic candidate Abdul El-Sayed to win. A poll released the next day showed El-Sayed leading by 11 percentage points.
The repeated appearance of large bets just before poll releases has raised suspicions that the trades may have been made using nonpublic information. Brett Goldstein, a researcher at Vanderbilt University's Institute of National Security, said the pattern was difficult to dismiss as mere coincidence and that further investigation was needed.
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