Welcome to the Prediction-Market Election

P.M. Edition for Oct. 30. Journal reporter Kevin Dugan tells us why this election will be a crucial test for Kalshi and Polymarket. The prediction markets say that the wisdom of crowds beats out traditional political polling–but they’ve had some big recent misses. Plus, the tech selloff deepened today, pushing the Nasdaq to its worst month in more than a year. We hear from markets reporter David Uberti about the cracks in the AI market worrying investors. And flu season’s off to an early start. WSJ health reporter Jennifer Calfas explains what we know about the strain and how you can fight it. Alex Ossola hosts. Sign up for the WSJ's free What's News newsletter. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.