30日低硫燃料油上涨2.49%，最新持仓变化

Core Insights - The main contract for low-sulfur fuel oil (2510) closed at a price increase of 2.49% as of July 30, with a trading volume of 116,400 contracts and a net short position among the top 20 positions of 8,065 contracts [1][3]. Trading Volume and Positions - Total trading volume for all low-sulfur fuel oil contracts reached 169,100 contracts, a decrease of 6,559 contracts from the previous day [1][4]. - Among the top 20 positions, long positions totaled 55,500 contracts, down by 6,130 contracts, while short positions totaled 58,900 contracts, down by 4,114 contracts [1][4]. Major Players - The top three long positions were held by Guotai Junan (6,382 contracts), CITIC Futures (6,219 contracts), and Galaxy Futures (4,852 contracts) [1][3]. - The top three short positions were also held by Guotai Junan (8,826 contracts), CITIC Futures (5,976 contracts), and Yong'an Futures (5,919 contracts) [1][3]. Changes in Positions - The top three increases in long positions were from Ping An Futures (2,393 contracts, up by 663), Hongyuan Futures (1,668 contracts, up by 425), and Galaxy Futures (1,586 contracts, up by 269) [1][3]. - The top three decreases in long positions were from Yong'an Futures (2,203 contracts, down by 2,576), Qian Kun Futures (2,955 contracts, down by 2,090), and Guotai Junan (4,665 contracts, down by 1,069) [1][3]. Short Position Changes - The top three increases in short positions were from COFCO Futures (888 contracts, up by 811), CITIC Futures (5,766 contracts, up by 780), and Guotai Futures (946 contracts, up by 478) [1][3]. - The top three decreases in short positions were from Yong'an Futures (5,321 contracts, down by 2,643), Nanhua Futures (2,114 contracts, down by 1,726), and Guotai Futures (1,224 contracts, down by 985) [1][3].