The S&P 500 Index rose 1.65% to 5064.12 points after opening on Thursday (February 22), setting a record high; the market was encouraged by the excellent performance of chip giant Nvidia. Nvidia shares soared more than 15% to a record high of $778.98.Currently, the Nasdaq is up more than 2.3%, the Dow Jones is up 0.70%, and the S&P 500 is up 1.6%.Due to strong sales of artificial intelligence chips, Nvidia's fourth-quarter revenue surged 265% year-on-year to US$22.1 billion, and net profit surged 769% year-on-year to US$12.29 billion.
