The Fortune article, which debuted about a week after suspicions of a different kind of manipulation on Polymarket, cited research done by two blockchain analytics firms. One, Chaos Labs, “concluded that around one-third of trading volume — and overall users — on the presidential market alone was likely wash trading, along with across all markets.” The other, Inca Digital, “found that a ‘significant portion of the volume’ on the market could be attributed to potential wash trading,” the magazine said.