On today’s Big Take podcast, professional sports gambler Rufus Peabody discusses why he has shifted more of his betting to prediction markets like Kalshi and Polymarke. And markets reporter Justina Lee and sports business reporter Ira Boudway sit down with host David Gura to discuss why these markets are drawing pros like Peabody — and the concerns the platforms raise for regulators and traditional sportsbooks.

Read more: How Polymarket and Kalshi Are Gamifying Truth

Hosted by David Gura; Produced by Julia Press; Reported by Justina Lee and Ira Boudway; Edited by Jeffrey Grocott.

Fact-checking by Eleanor Harrison-Dengate; Engineering by Katie McMurran.

Senior Producer: Naomi Shavin; Deputy Executive Producer: Julia Weaver. Executive Producer: Nicole Beemsterboer.

See omnystudio.com/listener for privacy information.