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Polymarket, Kalshi declare war on insider trading, warn of permanent ban for sharing confidential information

Prediction market platforms are tightening trading rules to curb insider trading and market manipulation, including blocking politicians and athletes from trading in markets directly tied to them. Kalshi introduced safeguards barring political candidates from betting on their own campaigns and prohibiting sports participants and officials from trading on games they are involved in. Polymarket updated integrity rules, detailing banned conduct and warning of wallet reviews, permanent bans, referrals to investigators and financial penalties.