A wave of insider-trading claims is spreading through Washington as officials and insiders allegedly bet on prediction markets using non-public info — bad for ordinary bettors and the fairness of the whole system.

• Trump's teleprompter operator is on unpaid leave for allegedly using inside knowledge of speeches to win over $100,000 betting on what Trump would say.
• Anonymous accounts made over $600,000 correctly betting on an April ceasefire, and multiple insiders allegedly bet on Vance being picked as VP before it was public.
• A 60 Minutes report tied nine accounts to millions in winning bets on military operations, with a 98% success rate — far too high to be luck.
• Trump Media reportedly pitched a $100,000-a-month fee for the fastest feed of Trump's posts, letting rich traders jump the market on tweets that move stocks and oil.
• The bigger worry: these markets funnel money from regular people to insiders and elites who know things before the public does.

Outlook: With more prediction markets and desperate people, insider betting is expected to grow, and regulators like the CFTC are only starting to investigate.