CNBCยท2025-04-09 20:01Group 1: Market Reactions - United Airlines and Microchip Technology experienced significant stock price increases, with United Airlines rising 26.9% and Microchip Technology increasing by 26.8% from session lows [1] - The S&P 500 index surged by as much as 10%, while the Dow Jones Industrial Average advanced over 3,100 points (approximately 8.1%), and the Nasdaq Composite jumped as much as 12.7%, marking its second-largest gain ever [4] Group 2: Trade Policy Impact - The temporary reduction of the highest new tariff rates on most U.S. imports to 10% for 90 days, alongside an increase in tariffs on Chinese imports to 125%, has created a volatile market environment [1] - Delta Air Lines refrained from reaffirming its financial guidance for the full year due to uncertainties stemming from higher U.S. tariffs on imports [2] Group 3: Semiconductor Industry Concerns - Despite semiconductor products being excluded from the tariff increases, companies like Microchip Technology and ON Semiconductor have faced stock declines since the market peak in February, driven by fears of an economic slowdown and weakening demand for chips [3] - The market's upward movement reflects a strong desire for clarity regarding tariff policies, indicating that President Trump's efforts to engage trade counterparts may be yielding positive results [5]