电力板块12月9日跌0.22%，京能热力领跌，主力资金净流出2.82亿元

Group 1 - The electric power sector experienced a decline of 0.22% compared to the previous trading day, with Jingneng Thermal Power leading the losses [1] - The Shanghai Composite Index closed at 3909.52, down 0.37%, while the Shenzhen Component Index closed at 13277.36, down 0.39% [1] - A detailed table of individual stock performance within the electric power sector is provided [1] Group 2 - In terms of capital flow, the electric power sector saw a net outflow of 282 million yuan from main funds, while speculative funds had a net inflow of 122 million yuan, and retail investors contributed a net inflow of 159 million yuan [2] - A detailed table of capital flow for individual stocks in the electric power sector is included [2]