US stocks plunged sharply on Thursday, with the Dow falling more than 400 points and the Nasdaq down about 1%. Retail giant Walmart saw its share price tumble nearly 10% after same-store sales and full-year guidance both came in below expectations, dragging down the broader market. AI hardware sectors such as storage chips and optical communications strengthened against the trend. Brent crude broke above $93 per barrel; concerns about inflation weighed on market sentiment, and US Treasury yields swung violently intraday, increasing short-term volatility.#美股 #科技股 #黄金 For reference only and does not constitute investment advice