Alphabet shares fell to a session low, down 5.4%, following reports of a major executive shakeup and high-profile talent departures at the tech giant. According to a report by The Wall Street Journal, Jeff Dean—one of Google’s earliest employees and a chief architect of its artificial intelligence strategy for the past 15 years—is leaving the company to launch an AI startup focused on scientific discovery. Joining Dean as co-founders are fellow Google AI veterans Oriol Vinyals, Quoc Le, and Sanj