房屋建设板块12月17日涨0.47%，龙元建设领涨，主力资金净流出3040.59万元

Group 1 - The housing construction sector increased by 0.47% compared to the previous trading day, with Longyuan Construction leading the gains [1] - The Shanghai Composite Index closed at 3870.28, up by 1.19%, while the Shenzhen Component Index closed at 13224.51, up by 2.4% [1] - A table detailing the individual stock performance within the housing construction sector is provided [1] Group 2 - In terms of capital flow, the housing construction sector experienced a net outflow of 30.41 million yuan from main funds, and a net outflow of 74.55 million yuan from speculative funds, while retail investors saw a net inflow of 105 million yuan [2] - A table showing the capital flow for individual stocks in the housing construction sector is included [2]