S&P 500 and Nasdaq Near Records on AI Chip Rally

On September 21, 2026, the S&P 500 and Nasdaq neared record highs, Reuters reported. The Nasdaq rose 2%, with the Dow and S&P 500 higher, Yahoo Finance reported. Gains in Advanced Micro Devices and other AI chip stocks lifted Wall Street. Chipmakers supply AI systems. In my view, returns lean too heavily on a few leaders.