Insider trading on prediction markets is illegal and could get perpetrators sued or land them in prison, the top enforcement lawyer at the Commodity Futures Trading Commission said Tuesday. David Miller, who was named earlier this year as the enforcement chief for the federal finance regulator, said he will be hiring more staff to bring cases — and cut deals — with traders, including those active on new marketplaces like Kalshi and Polymarket . "A myth has spread that insider trading is