Xin Lang Qi Huo·2025-07-28 08:29Core Insights - The main contract of the Shanghai Stock Exchange 50 Index futures closed at 2509 on July 28, with a slight increase of 0.36% and a trading volume of 28,900 contracts, indicating a net short position among the top 20 positions with a difference of 11,944 contracts [1][3]. Group 1: Trading Volume and Positions - The total trading volume for all contracts was 46,400 contracts, a decrease of 870 contracts from the previous day [1][4]. - Among the top 20 positions, long positions totaled 66,300 contracts, down by 861 contracts, while short positions totaled 82,900 contracts, down by 1,003 contracts [1][4]. Group 2: Major Players in Long and Short Positions - The top three long positions were held by CITIC Futures (11,226 contracts), Guotai Junan (11,062 contracts), and Haitong Futures (5,723 contracts) [1][4]. - The top three short positions were held by CITIC Futures (20,342 contracts), GF Futures (12,609 contracts), and Guotai Junan (11,504 contracts) [1][4]. Group 3: Changes in Long and Short Positions - The top three increases in long positions were from Guoxin Futures (1,840 contracts, +288), CITIC Futures (6,225 contracts, +210), and Everbright Futures (879 contracts, +104) [1][4]. - The top three decreases in long positions were from CITIC Jiantou (1,180 contracts, -181), Shenyin Wanguo (922 contracts, -115), and Haitong Futures (3,231 contracts, -115) [1][4]. - The top three increases in short positions were from CITIC Futures (14,216 contracts, +1,008), Guoxin Futures (1,787 contracts, +381), and Ping An Futures (505 contracts, +128) [1][4]. - The top three decreases in short positions were from GF Futures (11,152 contracts, -1,052), Guotai Junan (6,123 contracts, -318), and Haitong Futures (2,853 contracts, -271) [1][4].