U.S. Stocks Rally at Midday as Tech Gains on AI Optimism, Lower Yields

U.S. stocks traded firmly higher shortly after noon on Monday, September 21, 2026, lifted by falling Treasury yields and easing inflation concerns after a sharp decline in oil prices. Technology shares led the advance, rallying on renewed investor optimism surrounding artificial intelligence. The drop in crude prices eased pressure on inflation expectations, while lower bond yields supported equity valuations, particularly in growth sectors. Further details on index levels and individual movers were not immediately available.