有色金属套利周报-20250922

Report Information - Report Title: Non-ferrous Metals Arbitrage Weekly Report 20250922 [2] - Researchers: Zhang Jiefu, Wang Yanhong [2] - Investment Advisory Numbers: Z0016959, Z0010675 [2] - Email: zhangjf@zxqh.net, wangyh@zxqh.net [2] - Tel: 027 - 68851554 [2] Investment Ratings - No investment ratings are provided in the report. Core Views - For zinc's inter - period arbitrage, due to recent domestic smelting expansion, rapid accumulation of social inventory, and the zinc ore supply shifting from tight to loose cyclically, if there is no significant demand increase throughout the year, the supply - demand balance will tend towards surplus, putting pressure on the long - term price center. It is recommended to participate in zinc's inter - period positive arbitrage on dips [4]. - For the cross - variety arbitrage of aluminum and zinc, the zinc ore market is marginally loosening, with domestic smelting expanding and social inventory accumulating rapidly. The supply - demand balance is moving towards surplus. Meanwhile, the inflection point of aluminum's social inventory is approaching, and its fundamentals are stronger than zinc. It is recommended to participate in the strategy of going long on aluminum and short on zinc on dips [4]. Section Summaries 1. Weekly Price Performance Review and Capital Flow - Price Review: From September 12 to September 19, 2025, most non - ferrous metals on LME and SHFE showed price declines. LME copper dropped from 10067.5 to 9996.5, a decrease of 0.71%; LME zinc fell from 2956 to 2898.5, a decline of 1.95%. SHFE copper decreased from 81060 to 79910, a drop of 1.42%; SHFE zinc went down from 22305 to 22045, a decline of 1.17%. Only SHFE lead had a price increase, rising from 17040 to 17150, an increase of 0.65% [8]. - Capital Flow: The unilateral open interest of most non - ferrous metals is at a relatively low level in recent years. The unilateral open interest of aluminum has increased significantly recently. This week, the unilateral open interest of copper, aluminum, nickel, and tin decreased by 8.3%, 14.3%, 7.2%, and 6.3% respectively, while that of zinc and lead increased by 6.1% and 2.1% respectively. Except for zinc and lead, the main non - ferrous metals had net capital outflows this week [10]. 2. Non - ferrous Metal Inventory and Profit - Inventory: From September 12 to September 19, 2025, LME copper inventory decreased by 4.09% to 147650; LME aluminum inventory increased by 5.90% to 513900; LME zinc inventory decreased by 5.34% to 47825; LME lead inventory decreased by 4.04% to 220300; LME nickel inventory increased by 1.49% to 228444; LME tin inventory decreased by 4.39% to 2505 [26]. - Profit: This week, the processing fee of copper decreased slightly, and the smelter suffered a loss of 2426 yuan/ton, with the loss widening slightly compared to last week. The theoretical smelting cost of aluminum was 18320 yuan/ton, and the smelting profit rose slightly to 2520 yuan/ton. The import processing fee of zinc increased slightly, and the theoretical smelting profit of domestic zinc ore was 1040 yuan/ton [44]. 3. Non - ferrous Metal Basis and Term Structure - Basis: On September 19, 2025, the copper basis was 140, with a basis premium rate of 0.18%; the aluminum basis was 45, with a basis premium rate of 0.22%; the zinc basis was - 35, with a basis premium rate of - 0.16%; the lead basis was 110, with a basis premium rate of 0.64%; the nickel basis was 1520, with a basis premium rate of 1.25%; the tin basis was 240, with a basis premium rate of 0.09% [47]. - Term Structure: This week, zinc and nickel were in a Contango structure. The spread between the first - line contract and the near - month contract of copper was - 60, an increase of 240 compared to last week; that of aluminum was 15, an increase of 180; that of zinc was - 5, a decrease of 60; that of lead was 30, a decrease of 10; that of nickel was 230, an increase of 50; that of tin was 340, a decrease of 430 [62]. 4. Comparison of Domestic and Overseas Metal Prices - Shanghai - London Ratio: The Shanghai - London ratios of zinc and lead are at relatively high historical levels. This week, the Shanghai - London ratios of major metals showed mixed trends. The Shanghai - London ratios of copper, aluminum, zinc, lead, nickel, and tin were 1.12, 1.09, 1.07, 1.20, 1.12, and 1.10 respectively [79]. - Import Profit and Loss: This week, the import profit and loss of lead and nickel were 851 and 302 respectively, while those of other major metals were negative. Factors such as the Fed's interest - rate cut policy, the comparison of domestic and overseas inventories, and domestic macro - policy expectations should be considered for domestic - overseas arbitrage [79]. 5. Cross - variety Ratio Changes - Ratio and Spread: As of September 19, 2025, the copper - aluminum ratio was 3.84, with a ratio percentile of 83.9% and a spread of 59115; the copper - zinc ratio was 3.62, with a ratio percentile of 99.7% and a spread of 57865; the copper - lead ratio was 4.66, with a ratio percentile of 84.0% and a spread of 62760. The ratios and spreads of other metal combinations also showed different values and percentile positions compared to three months ago and one year ago [96].