Stock market today: Dow, S&P 500, Nasdaq slip as volatile week continues on Wall Street

US stocks surrendered early gains on Thursday as investors weighed AI demand signals and a prolonged US-China trade war stoked by President Trump. The tech-heavy Nasdaq Composite (^IXIC) flipped from solid gains to a 0.2% loss, even Nvidia (NVDA) and other AI-related stocks floated higher after chip manufacturing giant TSMC's stellar earnings. The S&P 500 (^GSPC) and the Dow Jones Industrial Average (^DJI) both fell roughly 0.3%. Chip stocks were boosted early Thursday after TSMC (TSM) hiked its outlook ...