美股开盘，三大股指集体高开

Group 1 - The U.S. stock market opened with all three major indices rising, with the Dow Jones up 0.21%, the Nasdaq up 0.95%, and the S&P 500 up 0.65% [1] - Technology stocks experienced broad gains, with TSMC rising 4.5% and reporting a 35% year-over-year profit increase in Q4, exceeding expectations and marking the eighth consecutive quarter of year-over-year profit growth [1] - Dell Technologies saw an increase of over 2.5%, with Q4 PC shipment growth reaching 26% year-over-year [1] - SanDisk rose nearly 3%, with Bernstein raising its target price from $300 to $580 [1]