30日30年期国债期货上涨0.40%，最新持仓变化

Core Insights - The main contract for the 30-year Treasury futures closed at 2509 on July 30, with a change of +0.40% and a trading volume of 159,200 contracts [1][2] - The total trading volume for all contracts reached 189,600 contracts, an increase of 2,670 contracts from the previous day [1][3] - The top 20 positions showed a net long position with a difference of 2,244 contracts [1] Trading Volume and Positions - The top three long positions were held by CITIC Futures (28,724 contracts), Guotai Junan (17,475 contracts), and Ping An Futures (9,798 contracts) [1][4] - The top three short positions were held by CITIC Futures (15,534 contracts), Guotai Junan (15,519 contracts), and Galaxy Futures (13,569 contracts) [1][4] - The total long positions for the top 20 seats amounted to 129,400 contracts, a decrease of 1,957 contracts from the previous day, while total short positions were 131,400 contracts, a decrease of 3,689 contracts [1][3] Changes in Positions - The top three long position increases were from GF Futures (4,335 contracts, +1,387), Galaxy Futures (7,272 contracts, +807), and Green DHH Futures (1,006 contracts, +328) [1][3] - The top three long position decreases were from Guojin Futures (4,472 contracts, -2,821), Dongzheng Futures (8,169 contracts, -1,154), and Hongyuan Futures (6,875 contracts, -774) [1][3] - The top three short position increases were from Guojin Futures (3,542 contracts, +895), Guoxin Futures (3,097 contracts, +283), and招商 Futures (3,070 contracts, +160) [1][3] - The top three short position decreases were from Dongzheng Futures (11,053 contracts, -1,417), CITIC Futures (11,730 contracts, -1,215), and Galaxy Futures (6,753 contracts, -1,085) [1][3]