林业板块12月31日跌7.05%，平潭发展领跌，主力资金净流出10.23亿元

Group 1 - The forestry sector experienced a decline of 7.05% on December 31, with Pingtan Development leading the drop [1] - The Shanghai Composite Index closed at 3968.84, up 0.09%, while the Shenzhen Component Index closed at 13525.02, down 0.58% [1] - Key stocks in the forestry sector showed varied performance, with ST Jinggu up 0.70% and Pingtan Development down 8.33% [1] Group 2 - The forestry sector saw a net outflow of 1.023 billion yuan from major funds, while retail investors had a net inflow of 1.118 billion yuan [1] - Detailed fund flow data indicated that Pingtan Development had a significant net outflow of 1.009 billion yuan from major funds, representing a 12.54% decrease [2] - Other stocks like Fujian Jinsen and Yong'an Forestry also experienced net outflows from major and speculative funds, with retail investors showing some interest [2]