Nvidia's market capitalization fell below $4 trillion for the first time since July 2025, with shares plunging 13% to $153 in a single trading session. The sharp decline followed the resignation of CEO Jensen Huang, triggering a massive sell-off among investors. The drop marks one of the most significant single-day losses in Nvidia's recent history, wiping out billions in market value as traders reassessed the company's leadership transition and its impact on long-term growth strategy.