有色金属行业跟踪周报：关税政策反复叠加美债拍卖遇冷，美国财政恶化驱使黄金价格再度走牛

Investment Rating - The report maintains an "Overweight" rating for the non-ferrous metals sector [1]. Core Views - The non-ferrous metals sector experienced a weekly increase of 1.26%, ranking it in the middle among all primary industries. Precious metals saw a significant rise of 5.58%, while industrial metals increased by 1.86% [1][14]. - The report highlights that tariff policies and a cooling U.S. Treasury auction have negatively impacted macroeconomic sentiment, leading to a weakening in industrial metals [1][24]. - Gold prices have surged due to deteriorating U.S. fiscal conditions, with COMEX gold closing at $3,357.70 per ounce, a 4.75% increase week-on-week [4][49]. Summary by Sections Market Review - The Shanghai Composite Index fell by 0.57%, while the non-ferrous metals sector rose by 1.26%, outperforming the index by 1.83 percentage points [14]. - Among the sub-sectors, precious metals led with a 5.58% increase, followed by industrial metals at 1.86%, while small metals and new materials declined [1][14]. Industrial Metals - Copper: As of May 23, LME copper was priced at $9,614 per ton, up 1.76% week-on-week. Supply remains tight due to mining incidents, but domestic smelting capacity is unaffected [2][32]. - Aluminum: LME aluminum closed at $2,466 per ton, down 0.62%. The supply side is impacted by the shutdown of bauxite mines in Guinea, leading to a significant rise in alumina prices [3][36]. - Zinc: LME zinc price increased by 0.78% to $2,713 per ton, with inventories decreasing [39]. - Tin: LME tin price fell by 0.46% to $32,665 per ton, with mixed inventory trends [45]. Precious Metals - Gold prices have risen significantly due to concerns over U.S. fiscal health, with a notable increase in both COMEX and SHFE gold prices [4][49]. - The report notes that the U.S. credit rating downgrade and a lackluster Treasury auction have further weakened market sentiment, contributing to the rise in gold prices [51][49]. Rare Earths - The report indicates stable supply and moderate demand for rare earths, with prices showing a slight decline [4]. News Highlights - The report discusses the implications of U.S. tariff policies and their potential impact on the market, particularly in relation to gold and industrial metals [4][51].