Kalshi Bans Inside Information Betting on Prediction Markets

Prediction market platform Kalshi is implementing strict new rules to combat insider trading. The platform will now prohibit individuals with privileged access—including politicians and professional athletes—from betting on events within their specific fields. To enhance transparency, Kalshi will allow users to flag suspicious movements or potentially fraudulent activities. These measures follow high-profile incidents of misuse in the industry. Notably, OpenAI recently dismissed an employee for using confidential information to profit from bets regarding the launches of Sora, GPT-5, and the Atlas browser. By restricting insiders and introducing community flagging, Kalshi aims to preserve the integrity and fairness of its predictive trading environment.