U.S. equities closed mixed in overnight trading (Beijing time May 27, 2026). The Dow Jones Industrial Average dipped 0.23%, the S&P 500 rose 0.61%, and the Nasdaq Composite jumped 1.19% to a new all-time high.

The Philadelphia Semiconductor Index soared 5.53%, also hitting a record, as AI-related chip stocks dominated gains. Micron Technology, NVIDIA, and other semiconductor names led the rally, underscoring the market’s strong preference for tech growth amid the artificial intelligence investment boom.
The divergent performance reflects a broader rotation: investors are favoring companies tied to AI capital expenditure, cloud infrastructure, and next-generation semiconductors, while cyclical and financial stocks lag on concerns about higher-for-longer interest rates.

Federal Reserve policy expectations remain a key crosscurrent. While strong data has raised rate-hike risks as early as October, the AI-driven tech rally has outweighed monetary policy jitters for growth investors.

Market breadth narrowed, with mega-cap tech names accounting for a large share of index gains. Analysts warned that concentration risks are rising, but acknowledged that the AI earnings cycle is still in early stages, supporting continued outperformance for leading tech and semiconductor stocks.
For now, the Nasdaq’s momentum remains intact, with investors focused on upcoming inflation prints and tech earnings to validate stretched valuations.