Zheng Xing Xing Ye Ri Bao·2025-09-18 08:52Market Overview - On September 18, the professional engineering sector declined by 1.69%, with Sentai Co., Ltd. leading the drop [1] - The Shanghai Composite Index closed at 3831.66, down 1.15%, while the Shenzhen Component Index closed at 13075.66, down 1.06% [1] Stock Performance - Notable gainers included: - Roman Co., Ltd. (605289) with a closing price of 63.01, up 5.10% and a trading volume of 123,300 shares, totaling 770 million yuan [1] - Zhonghua Rock and Soil (002542) closed at 4.10, up 4.59% with a trading volume of 2,272,200 shares, totaling 927 million yuan [1] - Major decliners included: - Sentai Co., Ltd. (603098) closed at 15.04, down 6.00% with a trading volume of 216,000 shares, totaling 330 million yuan [2] - Town Hai Co., Ltd. (603637) closed at 12.57, down 4.63% with a trading volume of 252,300 shares, totaling 321 million yuan [2] Capital Flow - The professional engineering sector experienced a net outflow of 139 million yuan from institutional investors, while retail investors saw a net inflow of 120 million yuan [2] - The overall capital flow for key stocks showed: - Roman Co., Ltd. had a net inflow of 1.05 billion yuan from institutional investors, but a net outflow from retail investors [3] - Zhonghua Rock and Soil had a net inflow of 55.59 million yuan from institutional investors [3]