US Stocks Climb Toward Highs on AI Chip Gains

US stocks climbed toward all-time highs on September 21, 2026, Reuters reported. The tech-heavy Nasdaq rose 2%, with the S&P 500 and Dow — baskets of many big US companies — also up, Yahoo Finance reported. Gains for Advanced Micro Devices and other makers of AI computer chips did the lifting. I worry too few firms drive returns.