关税突发！美国刚刚宣布

Group 1: Tariff Expansion - The Trump administration announced an expansion of the 50% tariffs on steel and aluminum imports, including hundreds of derivative products [1] - The U.S. Department of Commerce added 407 product codes to the tariff list, effective from August 18 [1] - The tariff on steel and aluminum imports was previously increased from 25% to 50% and will take effect on June 4, 2025 [2] Group 2: Semiconductor Tariffs - President Trump indicated plans to impose tariffs on imported chips and semiconductors within two weeks, with potential rates as high as 200% to 300% [3] - The previous announcement included a 100% tariff on semiconductors, with exemptions for companies building factories in the U.S. [3] - This policy targets a critical industry valued over $600 billion, raising significant market concerns [3]