The Anti-Corruption Data Collective (ACDC), a US non-profit investigative organization, recently reported in a report that abnormal winning rates suspected of insider trading were detected in military and defense-related betting on Polymarket. According to CoinDesk, the report pointed out, "An analysis of transaction data from January 2021 to mid-March 2026 showed that while the winning rate in typical political markets was 14%, the winning rate in defense-related markets reached 51.8%. Certain wallets made approximately $1.8 million in profits through large bets just before classified operations." ACDC added, "Measures are needed, such as strengthening user identity verification and withholding profit payments for suspicious transactions."
