Stock Market News for Sep 23, 2026

The Nasdaq closed at a record high Tuesday, lifted by META after positive reception to the company's AI assistant. The S&P 500 finished flat while the Dow fell 0.4%.

META shares gained as traders responded to the rollout of the company's AI assistant product, providing enough momentum to push the tech-heavy Nasdaq to an all-time high. The move extended the recent divergence between technology stocks and broader market indexes.

Oil prices dropped for the fifth straight session following President Trump's comments on constructive talks with Iran, easing supply concerns despite lingering geopolitical risk. The decline in energy prices weighed on the Dow while providing a tailwind for rate-sensitive growth stocks.

Markets are now positioning ahead of Thursday's U.S.-China summit, which could shift sentiment across risk assets depending on the outcome of trade and technology policy discussions between the two countries.