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Columbia Business School’s Professor Yash Kanoria spoke with Bloomberg reporter Lydia Beyoud about a new CBS study showing that prediction market platforms—such as Polymarket—have experienced significant artificially inflated trading activity. The research, Network-Based Detection of Wash Trading, identifies patterns of coordinated transactions designed to mimic organic market interest, potentially misleading users and distorting price signals. Kanoria and his co-authors explain how network-analysis tools can detect these manipulative behaviors and offer a path toward stronger oversight and platform transparency as prediction markets grow in popularity.
