Columbia Study Identifies Nearly 25% of Polymarket Volume as Wash Trading

A Columbia University study has found that wash trading accounted for nearly 25% of all transactions on Polymarket over the past three years. Sports markets showed the highest prevalence at 45% of volume, while crypto markets recorded the lowest at 3%. The decentralized prediction platform achieved $2.59 billion in trading volume in October and secured $205 million in funding across two rounds.