Sou Hu Cai Jing·2025-05-21 09:53Core Insights - The main contract for the CSI 300 Index futures closed at 2506 with a slight increase of 0.43% as of May 21, with a trading volume of 56,300 contracts and a net short position of 14,821 contracts among the top 20 positions [1][3]. Trading Volume and Positions - Total trading volume for all CSI 300 Index futures contracts reached 77,800 contracts, an increase of 5,519 contracts from the previous day [1]. - Among the top 20 positions, long positions totaled 166,000 contracts, a decrease of 2,922 contracts, while short positions totaled 195,900 contracts, a decrease of 3,186 contracts [1][4]. Major Players - The top three long positions were held by Guotai Junan with a total of 38,726 contracts, CITIC Futures with 19,756 contracts, and Haitong Futures with 16,273 contracts [1][4]. - The top three short positions were held by CITIC Futures with 45,901 contracts, Guotai Junan with 26,612 contracts, and Haitong Futures with 18,588 contracts [1][4]. Changes in Positions - The top three increases in long positions were from Dongzheng Futures (8,036 contracts, +983), CITIC Futures (11,970 contracts, +302), and Zheshang Futures (2,533 contracts, +144) [1]. - The top three decreases in long positions were from Haitong Futures (14,080 contracts, -1,491), Guotai Junan (23,043 contracts, -1,432), and Guotai Futures (4,667 contracts, -419) [1]. - The top three increases in short positions were from Dongzheng Futures (9,154 contracts, +479), Galaxy Futures (3,341 contracts, +205), and Fangzheng Futures (1,680 contracts, +160) [1]. - The top three decreases in short positions were from CITIC Futures (31,187 contracts, -1,209), Haitong Futures (6,326 contracts, -387), and Everbright Futures (1,560 contracts, -271) [1].