Insiders Are Cashing In on Prediction Markets

What this episode covers

Prediction markets like Polymarket and Kalshi are booming, but they’re facing questions about users betting on information that is not publicly available, from Super Bowl performances to geopolitical crises. Advocates for the platforms say they are "truth machines" but critics say they’re a new vehicle for insider trading. WSJ’s Caitlin Ostroff explains how users are making fortunes, and why regulators are starting to take notice. Ryan Knutson hosts. Further Listening: - How ‘The Joker’ Rigged the Texas Lottery - How Parlays Became the Biggest Bet in SportsSign up for WSJ’s free What’s News newsletter. Learn more about your ad choices. Visit megaphone.fm/adchoices

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How long is this episode of The Journal.?

This episode is 23 minutes long.

When was this The Journal. episode published?

This episode was published on February 17, 2026.

What is this episode about?

Prediction markets like Polymarket and Kalshi are booming, but they’re facing questions about users betting on information that is not publicly available, from Super Bowl performances to geopolitical crises. Advocates for the platforms say they are ...

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