工程咨询服务板块12月18日涨0.22%，矩阵股份领涨，主力资金净流出3000.56万元

Group 1 - The engineering consulting services sector increased by 0.22% compared to the previous trading day, with Matrix Co. leading the gains [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 within the engineering consulting services sector is provided [1] Group 2 - In terms of capital flow, the engineering consulting services sector experienced a net outflow of 30.06 million yuan from main funds and a net outflow of 33.27 million yuan from speculative funds, while retail investors contributed a net inflow of 63.28 million yuan [2] - A detailed table of capital flow for individual stocks within the engineering consulting services sector is provided [2]