房屋建设板块12月18日涨0.09%，上海建工领涨，主力资金净流出789.75万元

Group 1 - The housing construction sector increased by 0.09% compared to the previous trading day, with Shanghai Construction 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 in the housing construction sector is provided [1] Group 2 - In terms of capital flow, the housing construction sector experienced a net outflow of 789.75 thousand yuan from main funds, and a net outflow of 3756.38 thousand yuan from speculative funds, while retail investors saw a net inflow of 4546.13 thousand yuan [2] - A detailed table of capital flow for individual stocks in the housing construction sector is provided [2]