2 1 Shi Ji Jing Ji Bao Dao·2025-10-31 11:13Core Viewpoint - On October 31, the Shanghai Composite Index fell by 0.81%, the Shenzhen Component Index by 1.14%, and the ChiNext Index by 2.31%. The most significant net inflow of funds was into 360 (601360.SH), amounting to 6.91 billion yuan, while China Nuclear Engineering (601611.SH) experienced the largest net outflow of 5.21 billion yuan [1][2][4]. Group 1: Stock Performance - 360 saw a closing price increase of 10.02% with a turnover rate of 6.12%, and it accounted for 13.73% of the total trading volume [2][4]. - China Nuclear Engineering closed down by 10.03% with a turnover rate of 8.17%, representing 15.58% of the total trading volume [5][4]. Group 2: Institutional Activity - A total of 33 stocks appeared on the trading leaderboard, with institutions net buying 3.75 billion yuan, net buying 17 stocks and net selling 16 stocks [5][6]. - The stock with the highest net institutional buying was Zexin Pharmaceutical (688266.SH), which rose by 16.14% and had a turnover rate of 3.52% [6][7]. Group 3: Northbound Capital - Northbound funds participated in 18 stocks on the leaderboard, with a total net purchase of 730 million yuan. The highest net purchase was also in 360, amounting to 252 million yuan [11][14]. - The stock with the highest net selling by northbound funds was Yifang Bio (688382.SH), with a net outflow of 53.28 million yuan, while it closed up by 15.3% [11][15]. Group 4: Common Trends - Institutions and northbound funds jointly net bought stocks such as Zhongsheng Pharmaceutical, Te Yi Pharmaceutical, Zexin Pharmaceutical, and Foxit Software, while they jointly net sold stocks like Siwei Liekong, Zhongtung High-tech, and Yingxin Development [14][15].