纽铜暴跌18%，特朗普对进口半成品铜等征50%关税

Group 1: Market Reaction - Following President Trump's exclusion of refined copper from the tariff plan, New York copper prices plummeted over 18% within minutes, marking the largest single-day drop in history [1][2] - Freeport-McMoRan Inc. saw its stock price decline by approximately 10%, while Southern Copper's stock fell over 6% due to the announcement weakening the premium on U.S. copper prices [2] - The decision is viewed positively by Codelco, the Chilean state-owned copper company, as it benefits their exports to the U.S. market [2] Group 2: Tariff Details - Starting August 1, a 50% tariff will be imposed on various imported copper products, including semi-finished copper products and copper-intensive derivatives [3][5] - Copper input materials and scrap copper will not be subject to the tariffs, which is a significant distinction in the policy [3][6] - The tariffs are part of a broader strategy to boost U.S. domestic industries and address trade imbalances, following previous tariffs on steel and aluminum [5][6] Group 3: Industry Implications - The exclusion of refined copper from tariffs is expected to disrupt global copper trade flows, as refined copper is crucial for various applications, including electrical wiring [7][8] - Analysts suggest that the removal of refined copper from the tariff list eliminates arbitrage opportunities, leading to a convergence in market prices [9] - The U.S. relies heavily on copper imports, with about half of its copper needs being met through imports, primarily from Chile [10]