燃气板块12月18日跌0.19%，ST金鸿领跌，主力资金净流出1.42亿元

Group 1 - The gas sector experienced a decline of 0.19% compared to the previous trading day, with ST Jinhong leading the losses [1] - The Shanghai Composite Index closed at 3876.37, up by 0.16%, while the Shenzhen Component Index closed at 13053.98, down by 1.29% [1] - A detailed table of individual stock performance in the gas sector is provided [1] Group 2 - The gas sector saw a net outflow of 142 million yuan from main funds, while retail investors contributed a net inflow of 1.39 billion yuan [2] - Speculative funds recorded a net inflow of 2.88 million yuan into the gas sector [2] - A detailed table of fund flows for individual stocks in the gas sector is included [2]