11.5 x 7.8 cm. (4.5 x 3.1 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

March 6, 2026 • The 20-something billionaires who run Kalshi and Polymarket are battling it out to be the top prediction market company. Observers and former insiders say the feud is just heating up.