上期所基本金属期货夜盘收盘涨跌不一，沪铝涨0.27%

Group 1 - The core viewpoint of the article highlights the mixed performance of basic metal futures on the Shanghai Futures Exchange during the night session on August 15, with some metals experiencing gains while others faced declines [1][2]. Group 2 - Shanghai aluminum increased by 0.27% [1] - Shanghai zinc rose by 0.04% [1] - Shanghai lead decreased by 0.06% [1] - Shanghai copper fell by 0.23% [1] - Stainless steel dropped by 0.34% [1] - Alumina declined by 0.55% [1] - Shanghai tin decreased by 0.76% [1] - Shanghai nickel saw a decline of 1.19% [1]