Dow Jones, S&P 500, Nasdaq gain today: The S&P 500 climbed on Monday, led by strong gains in Investors have been closely watching tech stocks for year-end momentum. Nvidia shares jumped more than 1% after reports that the company plans to start shipping its H200 AI chips to China by mid-February. Micron Technology and Oracle each rose around 2%, supporting gains in the broader market.Last week saw mixed performance across major averages. Late-week rallies in tech lifted the S&P 500 and Nasdaq Composite to ...