US stocks in the red at open: S&P crashes on 1%, Dow fall over 400 points

Core Insights - US stocks experienced a decline on Tuesday, primarily driven by losses in artificial intelligence-related companies such as Palantir, as investors reevaluated high valuations following a year-long rally in technology shares [1] Group 1: Market Performance - The decline in US stocks was led by artificial intelligence-linked names, indicating a potential shift in investor sentiment towards these high-growth sectors [1] - The market correction comes after a significant rally in technology shares over the past year, suggesting that valuations may have become overstretched [1]