非金属材料板块12月11日跌1.13%，长江材料领跌，主力资金净流出4922.97万元

Group 1 - The non-metal materials sector experienced a decline of 1.13% on December 11, with Changjiang Materials leading the drop [1] - The Shanghai Composite Index closed at 3873.32, down 0.7%, while the Shenzhen Component Index closed at 13147.39, down 1.27% [1] - A detailed table of individual stock performance within the non-metal materials sector is provided [1] Group 2 - On the same day, the non-metal materials sector saw a net outflow of main funds amounting to 49.2297 million yuan, while speculative funds had a net inflow of 8.1892 million yuan, and retail investors contributed a net inflow of 41.0406 million yuan [2] - A table detailing the fund flow for individual stocks in the non-metal materials sector is included [2]