Nvidia stock closed up 8.74% on Thursday, adding ~$440B to Nvidia's market cap, after its revenue guidance reassured investors that AI demand remains strong (CNBC)

Nvidia’s shares jumped 8.74% on Thursday, adding roughly $440 billion to its market value after the company’s revenue forecast reassured investors that demand for AI products remains robust. Simultaneously, OpenAI, Anthropic, Amazon Web Services, Microsoft and more than 100 other firms warned of a narrow window to prepare for AI-enabled cyberattacks, urging coordinated action. The Trump administration is also considering sweeping new tariffs on semiconductors, laptops and consoles despite industry opposition.