The rise of prediction markets means you can now bet on just about anything, right from your phone. Apps like Kalshi and Polymarket have grown exponentially in President Trump’s second term, as his administration has rolled back regulations designed to keep the industry in check. Billions of dollars have flooded in, and users are placing bets on everything from whether it will rain in Seattle today to whether the US will take over control of Greenland. Who’s winning big on these apps? And who is losing? NPR correspondent Bobby Allyn joins The Sunday Story to explain how these markets came to be and where they are going.

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