Nvidia announces $150 billion buyback, largest in US corporate history

Nvidia boosted its share-repurchase authorization by $150 billion, bringing total available to $235 billion through fiscal 2028. The move signals confidence in long-term AI demand and cash flow generation. The stock rose nearly 2%. The authorization surpasses Apple's previous record $110 billion. Caveats include potential dilution from employee shares and dependency on sustained AI spending. Separately, Nvidia launched an open AI security platform.