橡胶板块9月30日涨1.53%，彤程新材领涨，主力资金净流入8847.49万元

Group 1 - The rubber sector experienced a rise of 1.53% on September 30, with Tongcheng New Materials leading the gains [1] - The Shanghai Composite Index closed at 3882.78, up 0.52%, while the Shenzhen Component Index closed at 13526.51, up 0.35% [1] - Key stocks in the rubber sector showed significant price increases, with Tongcheng New Materials rising by 4.69% to a closing price of 44.19 [1] Group 2 - The rubber sector saw a net inflow of main funds amounting to 88.47 million yuan, while retail investors experienced a net outflow of 131 million yuan [3] - The table of fund flows indicates that retail investors withdrew funds, contrasting with the inflow from institutional and speculative investors [3]