金属新材料板块12月31日跌0.17%，江南新材领跌，主力资金净流出2.92亿元

Group 1 - The metal new materials sector experienced a decline of 0.17% on December 31, with Jiangnan New Materials leading the drop [1] - The Shanghai Composite Index closed at 3968.84, up 0.09%, while the Shenzhen Component Index closed at 13525.02, down 0.58% [1] - Key stocks in the metal new materials sector showed varied performance, with Tianli Composite rising by 5.40% and Jiangnan New Materials falling by 3.18% [1][2] Group 2 - The net outflow of main funds in the metal new materials sector was 292 million yuan, while retail investors saw a net inflow of 311 million yuan [2] - The trading volume and turnover for key stocks varied significantly, with Sry New Materials achieving a turnover of 2.044 billion yuan [1][2] - Detailed fund flow data indicates that Sry New Materials had a net inflow of 1 billion yuan from main funds, while other stocks like AnTai Technology and Tianli Composite also saw varying levels of fund inflow and outflow [3]