装修建材板块12月16日跌0.91%，晶雪节能领跌，主力资金净流出1.8亿元

Group 1 - The core viewpoint of the articles indicates a decline in the renovation and building materials sector, with a drop of 0.91% on December 16, and a significant decrease in major indices, including a 1.11% drop in the Shanghai Composite Index and a 1.51% drop in the Shenzhen Component Index [1][2] Group 2 - On the same day, the main funds in the renovation and building materials sector experienced a net outflow of 180 million yuan, while retail investors saw a net inflow of 105 million yuan and speculative funds had a net inflow of approximately 75.47 million yuan [2]