上期所基本金属期货夜盘收盘涨跌不一，沪锡涨2.35%

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 February 27, with some metals experiencing gains while others faced declines [1][2]. Group 2 - Shanghai tin rose by 2.35% [1] - Shanghai lead increased by 0.27% [1] - Shanghai zinc decreased by 0.04% [1] - Shanghai copper fell by 0.15% [1] - Shanghai aluminum dropped by 0.34% [1] - Stainless steel declined by 0.81% [1] - Shanghai nickel fell by 1.25% [1] - Aluminum oxide decreased by 3.55% [1]