Nvidia lifts buyback authorization to $235 billion as shares climb

Nvidia shares rose in early trading Monday after the company announced a record $150 billion increase in its share-repurchase authorization, bringing the total to $235 billion, and a new platform for AI safety guardrails.

The report put Nvidia's market capitalization above $5.5 trillion, more than $500 billion higher than Apple's. The company is currently expected to report third-quarter results on Nov. 17.