US stocks opened with mixed results as Meta Platforms saw a significant rise, while Microsoft experienced a notable decline. Meta's stock surged approximately 10% following its impressive fourth-quarter results and optimistic guidance for the first quarter, alongside full-year capital expenditures that surpassed market expectations. Conversely, Microsoft faced a steep drop of over 9%, marking its largest intraday decline since 2020. The downturn was driven by investor concerns over slowing growth in its cloud business and unprecedented capital expenditures. The broader market saw the Dow Jones Industrial Average increase by 0.14%, the S&P 500 rise by 0.18%, and the Nasdaq Composite decrease by 0.13%.