煤炭开采板块12月5日涨0.12%，电投能源领涨，主力资金净流出3073.51万元

Group 1 - The coal mining sector increased by 0.12% on December 5, with Electric Power Investment leading the gains [1] - The Shanghai Composite Index closed at 3902.81, up 0.7%, while the Shenzhen Component Index closed at 13147.68, up 1.08% [1] - Electric Power Investment's stock price rose by 6.96% to 28.60, with a trading volume of 283,200 shares and a transaction value of 796 million [1] Group 2 - The coal mining sector experienced a net outflow of 30.73 million from institutional investors, while retail investors saw a net inflow of 22.3 million [2] - Major stocks in the coal mining sector showed varied performance, with some stocks like Daya Energy and China Shenhua experiencing declines of 1.81% and 0.53% respectively [2] - The trading volume and transaction values for various coal mining stocks were significant, with Daya Energy recording a transaction value of 649 million [2] Group 3 - Individual stock performance showed that Yongtai Energy had a net inflow of 14.216 million from institutional investors, while retail investors had a net outflow of 6.71 million [3] - New Dazhou A and Jiangtong Equipment also had mixed net inflows and outflows from different investor types [3] - The data indicates a trend of institutional investors pulling back while retail investors are more active in the coal mining sector [3]