普钢板块12月11日跌1.51%，三钢闽光领跌，主力资金净流出2.87亿元

Group 1 - The core viewpoint of the article indicates that the steel sector experienced a decline, with the overall index showing a downward trend on the trading day [1] - The Shanghai Composite Index closed at 3873.32, down by 0.7%, while the Shenzhen Component Index closed at 13147.39, down by 1.27% [1] - The steel sector saw a drop of 1.51%, with Sansteel Mingguang leading the decline [1] Group 2 - In terms of capital flow, the steel sector experienced a net outflow of 287 million yuan from main funds, while retail investors contributed a net inflow of 445 million yuan [2] - Speculative funds also saw a net outflow of 159 million yuan from the steel sector [2] - Detailed capital flow for individual stocks in the steel sector is provided in the accompanying table [2]