美国铝溢价飙升155%创历史新高，关税叠加供应紧张推升成本压力

Core Insights - The aluminum market in the U.S. has reached a historical high in premiums, significantly increasing the cost of acquiring aluminum, driven by tariffs and global supply constraints [1][3] - The Midwest U.S. aluminum premium hit $0.8810 per pound (equivalent to $1942 per ton), with the actual price for U.S. spot buyers rising to $4792 per ton, reflecting a cumulative increase of over 155% since June [1] Tariff Impact - The increase in aluminum import tariffs from 25% to 50% by the Trump administration in June has led to a current tariff burden of $1425 per ton, more than doubling from $560 at the beginning of the year [3] - The expectation of permanent tariffs has intensified following the cancellation of trade negotiations with Canada, which is the largest aluminum supplier to the U.S., accounting for over 70% of imports [3] Global Supply Constraints - A structural supply shortage in the global aluminum market is contributing to rising costs, with an anticipated supply gap of 1.8 million tons this year [3] - China's net exports of refined metals and semi-finished products have decreased significantly, alongside a decline in aluminum production outside of China, leading to a total reduction of 2 million tons in global aluminum supply [3]