深夜，特朗普又发出关税威胁，最高或达300%

Market Performance - The three major U.S. stock indices showed mixed results on August 15, with the Nasdaq and S&P 500 reaching intraday all-time highs. The Dow Jones Industrial Average rose by 0.08%, while the S&P 500 fell by 0.29% and the Nasdaq Composite decreased by 0.4% [1] - For the week, the Dow Jones increased by 1.74%, the S&P 500 rose by 0.94%, and the Nasdaq gained 0.81% [2] Sector Performance - Large tech stocks had mixed performances, with Intel rising nearly 3%, while Tesla fell over 1%. Other tech giants like Microsoft, Apple, and Nvidia saw slight declines [2] - UnitedHealth Group surged nearly 12% after Berkshire Hathaway disclosed a new position in the company [2] - Popular Chinese stocks mostly rose, with the Nasdaq China Golden Dragon Index increasing by 0.74% and a weekly gain of 1.84%. Notable performers included Xunlei, which rose over 26%, and NIO, which increased nearly 8% [2] - The solar energy sector received positive news, with Daqo New Energy rising over 8%, Canadian Solar increasing by more than 7%, and JinkoSolar gaining over 6% [2] Tariff Implications - Reports indicate that former President Trump plans to announce tariffs on imported steel, semiconductors, and chips, with potential rates as high as 300% [3][4] - Trump suggested that initial rates would be lower to encourage domestic manufacturing, but would increase significantly over time [4] - The tariffs on chips and semiconductors are part of an ongoing investigation by the U.S. Department of Commerce, which could take months to conclude [4]