Stock market today: Dow, S&P 500, Nasdaq pull back as AI worries sap markets ahead of Nvidia earnings

US stocks retreated on Tuesday as worries about an AI bubble and the broader US economy continued to set markets on edge, with a pivotal Nvidia (NVDA) earnings report and shutdown-delayed jobs data on the horizon. The Dow Jones Industrial Average (^DJI) fell nearly 0.8%, coming off the worst three-day run for the blue-chip benchmark since April. The tech-heavy Nasdaq Composite (^IXIC) pulled back roughly 0.5%, while the S&P 500 (^GSPC) was roughly 0.3% lower, eyeing its fourth consecutive losing session. ...