Key facts
- Anthropic filed for its initial public offering.
- Investor unease over debt-fueled spending on AI infrastructure persists.
- Nvidia, Microsoft, and Amazon shares saw gains.
- The Philadelphia Semiconductor Index was up over 3%.
AI-linked stocks advanced on Monday as Anthropic filed for its initial public offering, against a backdrop of growing investor unease over debt-fueled spending on infrastructure for the new technology. Shares of Nvidia, the world's most valuable company, added nearly 3%, while Microsoft and Amazon gained nearly 1% each. A successful flotation by a pure-play AI giant like Anthropic could reshape how markets value parts of the booming industry. Among other AI stocks, CoreWeave and Nebius Group rose 5.7% and 2.3%, respectively, after the filing. Data center operators Applied Digital and IREN gained 1% and 3%, respectively. Memory chipmaker Micron rose 3%, and data-storage firms Sandisk, Western Digital and Seagate added about 2.5% each. AMD and Broadcom gained 2.5% and 3%, respectively. Zoom Communications, an early investor in Anthropic, rose 1.5%. The broader Philadelphia Semiconductor Index was up over 3%.