Core Viewpoint - The article discusses the recent changes in the trading volume and positions of various commodity futures, highlighting significant price increases and variations in open interest. Group 1: Commodity Futures Performance - The main contract for alumina increased by over 6%, with an increase in open interest of more than 14,000 contracts and a trading volume exceeding 640,000 contracts [1] - The main contract for glass rose by over 5%, with a decrease in open interest of more than 200,000 contracts and a trading volume close to 1.3 million contracts [1] - The main contract for soda ash saw an increase of over 4%, with a reduction in open interest of more than 210,000 contracts and a trading volume exceeding 2.4 million contracts [1] - The main contract for caustic soda increased by over 4%, with a decrease in open interest of nearly 1,400 contracts and a trading volume exceeding 50,000 contracts [1] - The main contract for coking coal rose by nearly 4%, with a decrease in open interest of nearly 4,000 contracts and a trading volume exceeding 80,000 contracts [1] - The main contract for polyvinyl chloride (PVC) increased by nearly 3%, with a reduction in open interest of over 50,000 contracts and a trading volume exceeding 120,000 contracts [1]