铝价升至六个月高位，供应忧虑加剧

Group 1 - The Aluminum Monthly Metal Index (MMI) remains stable with a slight increase of 0.56% from August to September, while global aluminum prices have reached a new high for the year [2] - Concerns over supply shortages are driving aluminum prices upward, with the London Metal Exchange (LME) aluminum price hitting a six-month high on September 16 [3] - Despite a long-standing global oversupply, demand remains weak, and while global exchange inventories have decreased, the market's reaction to China's aluminum production cap has been muted [4] Group 2 - Although supply concerns have provided momentum for aluminum prices, there are doubts about the sustainability of this recent price breakthrough, as both Chinese and global production continue to rise [5] - U.S. tariffs have suppressed aluminum demand, with North American aluminum demand declining by 4.4% in the first half of 2025, leading Canadian producers to shift exports to Europe [6] - The Midwest aluminum premium has reached a historic high of $0.7323 per pound, reflecting the rise in LME aluminum prices, although trade policy uncertainties persist in the market [8]