2 1 Shi Ji Jing Ji Bao Dao·2025-09-15 11:59Core Viewpoint - On September 15, the Shanghai Composite Index fell by 0.26%, while the Shenzhen Component Index rose by 0.63%, and the ChiNext Index increased by 1.52%. The market saw significant activity with 46 stocks appearing on the "Dragon and Tiger List," indicating notable trading volume and institutional involvement [2][6]. Group 1: Stock Performance - Cambridge Technology (603083.SH) had the highest net inflow of funds, amounting to 798 million yuan, which accounted for 11.26% of the total trading volume. The stock closed up by 7.4% with a turnover rate of 24.12% [2][4][6]. - Weichai Heavy Machinery (000880.SZ) experienced the largest net outflow of funds, totaling 217 million yuan, representing 10.09% of its total trading volume. The stock closed down by 7.86% with a turnover rate of 28.2% [4][5][10]. Group 2: Institutional Activity - On the same day, institutions were involved in 24 stocks, with a total net selling of 600 million yuan. Institutions net bought 6 stocks and net sold 18 stocks, with Cambridge Technology being the most significant net purchase [6][10]. - The net buying amount for Cambridge Technology by institutions was 338 million yuan, which was 4.78% of its total trading volume [7][14]. Group 3: Northbound Capital - Northbound capital participated in 23 stocks, with a total net inflow of 700 million yuan. The net buying was 315 million yuan for the Shanghai Stock Connect and 385 million yuan for the Shenzhen Stock Connect [10][13]. - Cambridge Technology also saw the highest net inflow from northbound capital, amounting to 254 million yuan, which was 3.59% of its total trading volume [10][14].