基础建设板块9月9日跌0.78%，交建股份领跌，主力资金净流出4.14亿元

Market Overview - On September 9, the infrastructure sector declined by 0.78% compared to the previous trading day, with Jiangjian Co. leading the decline [1] - The Shanghai Composite Index closed at 3807.29, down 0.51%, while the Shenzhen Component Index closed at 12510.6, down 1.23% [1] Individual Stock Performance - Notable gainers included: - *ST Zhengping, closing at 3.26 with a rise of 5.16% and a trading volume of 314,000 shares [1] - *ST Jiaotou, closing at 7.73 with a rise of 3.76% and a trading volume of 83,200 shares [1] - Major decliners included: - Jiangjian Co., closing at 11.37 with a drop of 6.50% and a trading volume of 348,400 shares [2] - ST Lingnan, closing at 1.52 with a drop of 5.00% and a trading volume of 92,900 shares [2] Capital Flow Analysis - The infrastructure sector experienced a net outflow of 414 million yuan from institutional investors, while retail investors saw a net inflow of 342 million yuan [2] - The table of capital flow indicates that: - Hongrun Construction had a net inflow of 61.90 million yuan from institutional investors, but a net outflow from retail investors [3] - *ST Zhengping had a net inflow of 15.15 million yuan from institutional investors, with outflows from both retail and speculative investors [3]