水泥板块10月17日跌1.36%，上峰水泥领跌，主力资金净流出3.65亿元

Market Overview - On October 17, the cement sector declined by 1.36% compared to the previous trading day, with Shangfeng Cement leading the drop [1] - The Shanghai Composite Index closed at 3839.76, down 1.95%, while the Shenzhen Component Index closed at 12688.94, down 3.04% [1] Individual Stock Performance - Shangfeng Cement (000672) closed at 10.70, down 4.21% with a trading volume of 401,800 shares and a turnover of 436 million yuan [2] - Fujian Cement (600802) closed at 5.65, up 1.44%, with a trading volume of 241,100 shares and a turnover of 137 million yuan [1] - Other notable stocks include Longquan Co. (002671) at 5.03, down 0.80%, and Sichuan Jinding (600678) at 9.08, down 2.16% [2] Capital Flow Analysis - The cement sector experienced a net outflow of 365 million yuan from institutional investors, while retail investors saw a net inflow of 328 million yuan [2][3] - Fujian Cement had a net inflow of 10.72 million yuan from institutional investors, but a net outflow of 14.03 million yuan from retail investors [3] - Tianshan Co. (000877) reported a net inflow of 7.88 million yuan from institutional investors, while retail investors had a slight outflow [3]