氧化铝：主力涨逾 4% 有色金属期市波动

Core Insights - The domestic non-ferrous metal market showed significant gains on May 15, with aluminum oxide leading the increase by over 4% [1] - The main contracts for various metals exhibited mixed performance, with lithium carbonate experiencing a decline of 0.86% [1] Market Performance - Aluminum oxide rose by 4.52%, reaching 3008.00 CNY/ton [1] - Industrial silicon increased by 0.84%, priced at 8450.00 CNY/ton [1] - Shanghai aluminum saw a rise of 0.77%, trading at 20275.00 CNY/ton [1] - Lithium carbonate fell to 64180.00 CNY/ton, down 0.86% [1] Inventory Data - Copper futures inventory increased by 20912 tons, totaling 50069 tons [1] - Aluminum futures inventory rose by 1106 tons, reaching 62446 tons [1] - Zinc futures inventory remained stable at 1600 tons [1] - Tin futures inventory decreased by 60 tons, totaling 8179 tons [1] - Lead futures inventory increased by 957 tons, totaling 48250 tons [1] - Nickel futures inventory decreased by 398 tons, totaling 23549 tons [1] - International copper futures inventory increased by 2450 tons, totaling 13744 tons [1] - Aluminum oxide futures inventory decreased by 1199 tons, totaling 217034 tons [1] Basis Data - Several metals exhibited a "backwardation" phenomenon, including copper, zinc, nickel, tin, industrial silicon, lithium carbonate, and polysilicon [1] - Copper basis was 301 with a basis rate of 0.38% [1] - Zinc basis was 330 with a basis rate of 1.44% [1] - Aluminum basis was -86 with a basis rate of -0.43% [1] - Lead basis was -70 with a basis rate of -0.42% [1] - Nickel basis was 1908 with a basis rate of 1.51% [1] - Tin basis was 508 with a basis rate of 0.19% [1] - Industrial silicon basis was 1145 with a basis rate of 11.91% [1] - Lithium carbonate basis was 226 with a basis rate of 0.35% [1] - Polysilicon basis was 580 with a basis rate of 1.49% [1] - International copper basis was -15 with a basis rate of -0.02% [1]