橡胶板块12月2日涨1.45%，彤程新材领涨，主力资金净流出2129.7万元

Group 1 - The rubber sector increased by 1.45% on December 2, with Tongcheng New Materials leading the gains [1] - The Shanghai Composite Index closed at 3897.71, down 0.42%, while the Shenzhen Component Index closed at 13056.7, down 0.68% [1] - Key stocks in the rubber sector showed varied performance, with Tongcheng New Materials closing at 45.35, up 6.31%, and other notable stocks like Sanwei Co. and Longxing Technology also showing positive gains [1] Group 2 - The rubber sector experienced a net outflow of 21.3 million yuan from main funds, while retail investors saw a net inflow of 34.63 million yuan [2] - The individual stock fund flows indicated that Longxing Technology had a main fund net inflow of 16.37 million yuan, while Black Cat Co. experienced a net outflow of 12.43 million yuan from retail investors [3] - The overall trading volume and turnover in the rubber sector reflected active participation, with significant transactions recorded for stocks like Tongcheng New Materials and Sanwei Co. [1][2]