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Polymarket and Kalshi Grapple With A New Class of Insider Trader | Big Take
Posted
July 20, 2026
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1,059
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July 20, 2026
1,059
22
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20:31Now PlayingFrom celebrity wedding details to the timing of military strikes, prediction markets have opened the door to gambling on almost anything. They’ve also created a new class of insider trader that platforms and US regulators are racing to stop.
On today’s Big Take podcast, Bloomberg’s Denitsa Tsekova and Leonardo Nicoletti join host Sarah Holder to break down a $200 million surge in unusual bets on Polymarket — and explore what it will take for regulators to rein them in.
We have a special Bloomberg subscription offer for podcast listeners at Bloomberg.com/podcastoffer. ()
Hosted by Sarah Holder; Produced by Rachael Lewis-Krisky and Victor Swezey; Reported by Denitsa Tsekova and Leonardo Nicoletti; Edited by Aaron Edwards and Julia Weaver.
Fact-checking by Victor Swezey, Laura Newcombe and David Fox; Engineering by Emma Munger.
Senior Producer: Naomi Shavin; Deputy Executive Producer: Julia Weaver. Executive Producer: Nicole Beemsterboer.
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Polymarket and Kalshi Grapple With A New Class of Insider Trader
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