Kalshi and Polymarket tighten insider-trading rules for prediction markets
Kalshi and Polymarket have revised their rules to restrict access to markets for people who could influence event outcomes, including politicians and athletes. Kalshi added advance screening, while Polymarket clarified prohibited conduct and opened channels for reporting suspicious activity, as US lawmakers consider restrictions on prediction markets.
The rule changes affect who can trade and how the platforms handle suspected insider activity in US prediction markets.