US Stock Market Today: Live Updates 21.05.2026
LIVEMarkets rolling coverageStarted: May 21, 2026, 4:00 AM EDTUpdated: May 21, 2026, 5:14 AM EDT U.S. Stocks Rise Sharply on Iran Deal Optimism and Oil Price Drop May 21, 2026, 5:05 AM EDT.U.S. stock indexes surged on Wednesday led by the S&P 500 (+1.08%), Dow Jones (+1.31%), and Nasdaq 100 (+1.66%), driven by a sharp decline in crude oil prices of over 5% amid hopes for an Iran war resolution. Lower oil prices eased inflation expectations and caused the 10-year Treasury yield to drop 10 basis points to 4.57%. Semiconductor shares advanced, with Nvidia rising over 1% ahead of earnings