On September 18, 2026 (Beijing Time), the U.S. stock market sustained its upward momentum after a higher open on Thursday. All three major indices—the Dow, the Nasdaq, and the S&P 500—advanced ahead of the closing bell, with a notable tilt toward growth stocks. By market close, the Dow had climbed 0.71%, the Nasdaq Composite Index rose 1.64%, and the S&P 500 Index gained 1.13%.

Tech stocks, in general, witnessed a broad-based rally. Nvidia's shares jumped 2.54%, while Amazon and Tesla both surged by more than 2%. Apple, Microsoft, Google, and Meta also closed in positive territory. Intel received a significant boost as Nvidia committed to a $5 billion investment, propelling Intel's stock price to soar over 10% and fueling a broader rally in semiconductor stocks.

Moreover, the AI computing power sector and memory chip companies emerged as the primary beneficiaries of capital inflows. The Philadelphia Semiconductor Index opened 3% higher, with both memory chip giants rallying more than 5%.