S&P 500 Gains and Losses Today: Supermicro Stock Surges Ahead of Business Update

Market Overview - Major U.S. equities indexes increased, with the S&P 500 rising by 0.7%, the Dow gaining 0.4%, and the Nasdaq closing 1.0% higher, as markets reacted to President Trump's announcement of additional tariffs on steel and aluminum imports [2][9] - Investors are awaiting a series of quarterly earnings reports, including those from Coca-Cola and McDonald's, as well as the latest Consumer Price Index (CPI) data [2] Company Performances - Super Micro Computer (SMCI) shares surged by 17.6% ahead of a business update, with analysts optimistic about the company's ability to file its delayed annual report by the February 25 deadline [3] - Rockwell Automation (ROK) shares increased by 12.6% after reporting better-than-expected profits for its fiscal first quarter, showcasing progress in cost-reduction and margin-expansion initiatives [4] - Western Digital (WDC) shares rose by 7.1% following an overweight rating from Cantor Fitzgerald, amid management changes related to the planned spinoff of its flash business [5] Negative Performances - ON Semiconductor (ON) shares fell by 8.2% after missing profit and sales estimates for the fourth quarter, with year-over-year sales declines across all segments and a below-forecast guidance for 2025 [6] - Incyte (INCY) reported lower-than-expected adjusted profits for the fourth quarter, with a disappointing sales outlook for 2025, leading to a 7.9% drop in its shares [7] - Deckers Outdoor (DECK) shares decreased by 3.9%, despite a recent upgrade to "buy" from Citi analysts, as concerns about the impact of China tariffs on the company emerged [8]