[Study Finds Polymarket Trading Volume Inflated Due to Wash Trading] On November 7, researchers from Columbia University released a new study indicating that the trading activity on the prediction market platform Polymarket has been significantly inflated due to users frequently engaging in wash trading by buying and selling the same contracts. The study shows that this artificial trading phenomenon varies over time but has accounted for an average of approximately 25% of Polymarket's total trading volume over the past three years.