Researchers claim that the prediction website Polymarket is filled with false 'Whipsaw' trades.

Odaily Planet Daily News Chaos Labs and Inca Digital analysts found rampant Whipsaw trading on Polymarket, despite its odds being widely circulated on social and mainstream media, they found signs of false trading activity on Polymarket, a form of market manipulation where buying and selling typically occurs simultaneously and repeatedly to create the illusion of volume and activity. Chaos Labs found that about a third of the fake trades account for the total presidential election market volume on Polymarket, while Inca Digital found that a "significant portion of the volume" in the market may be due to potential fake trades. (Fortune)