U.S. stocks staged a strong comeback to start the week as falling oil prices, surging bitcoin prices and renewed enthusiasm for artificial intelligence (AI) lifted investor sentiment. Technology stocks rallied ahead of an expected dinner between AI industry leaders and Chinese President Xi Jinping later this week. The tech-heavy Nasdaq Composite led the gains, jumping 2.3% on Sept. 21, 2026, to close at a new all-time high. The S&P 500 advanced 1.5%, while the Dow Jones Industrial Average rose about 0.8%. The latest rally highlights the resilience of U.S. equities despite several recent challenges.
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