Markets closed mixed after most indices saw two days of rallies. A.I. led today's upside action off enthusiasm of Saudi Arabian deals, especially in Nvidia (NVDA), AMD Inc. (AMD) and Supermicro (SMCI). Oklo Inc. (OKLO) also saw double-digit gains following its earnings report, while Coreweave (CRWV) posted its first post-IPO earnings. Caroline Woods takes investors through the day's biggest A.I. movers.