装修建材板块12月18日涨0.4%，法狮龙领涨，主力资金净流出1.46亿元

Group 1 - The core viewpoint of the news is that the renovation and building materials sector experienced a slight increase of 0.4% on December 18, with the leading stock being Lawsons [1] - On the same day, the Shanghai Composite Index closed at 3876.37, reflecting a rise of 0.16%, while the Shenzhen Component Index closed at 13053.98, showing a decline of 1.29% [1] Group 2 - In terms of capital flow, the renovation and building materials sector saw a net outflow of 146 million yuan from main funds, while retail investors contributed a net inflow of 174 million yuan [2] - The sector also experienced a net outflow of 28.06 million yuan from speculative funds on the same day [2]