一周市场回顾（2025.10.13—2025.10.17）

Market Performance - The Shanghai Composite Index fell by 1.47%, closing at 3839.76 points[5] - The Shenzhen Component Index decreased by 4.99%, ending at 12688.94 points[5] - The ChiNext Index dropped by 5.71%, closing at 2935.37 points[5] - The average daily trading volume for A-shares was 21,928 billion CNY, a decrease of 15.76% from the previous week[11] Sector Performance - The banking sector saw an increase of 4.89%, while coal rose by 4.17%[14] - The electronics sector experienced the largest decline at -7.14%, followed by media at -6.27%[14] Margin Trading - As of October 17, the total margin trading balance was 24,293.85 billion CNY, a decrease of 0.51% from the previous week[16] - The margin trading balance accounted for 2.59% of the A-share market capitalization, an increase of 2.02% from the previous week[16] Trading Activity - The total margin trading transaction volume was 12,070.23 billion CNY, an increase of 91.01% from the previous week[17] - Margin trading transactions accounted for 11.01% of the total A-share trading volume, a decrease of 9.30% from the previous week[17] Industry Trends - The top five industries with increased margin trading balances were non-ferrous metals (2.761 billion CNY) and machinery (1.911 billion CNY)[23] - The top five industries with decreased margin trading balances included electronics (-6.431 billion CNY) and communications (-4.824 billion CNY)[23]