US stock markets today (May 30, 2026): S&P 500, Nasdaq extend record run as Dell jumps 33% on AI demand

US stocks continued their record-setting rally, driven by strong earnings and AI optimism, pushing major indices higher. Despite inflation and geopolitical concerns, investor sentiment was buoyed by hopes of a US-Iran ceasefire extension, easing energy market pressures. Technology stocks, particularly Dell, led the gains as markets closed the week on a positive note.