Group 1 - Hong Kong copper stocks experienced a collective rebound, with China Daye Nonferrous Metals leading the rise at approximately 9%, followed by Jiangxi Copper at 3%, and China Gold International and China Nonferrous Mining both up by 1.3% [1] - Mining giant Glencore is reportedly planning to close its Horne smelter and associated copper refinery in Quebec, Canada, due to environmental issues and the substantial capital required for upgrades [1] - The Horne smelter has an estimated annual production capacity of over 300,000 tons, accounting for about 17% of copper imports to the United States, indicating a significant impact on the North American copper supply chain [1] Group 2 - Earlier this year, traders moved large quantities of copper into the U.S. market in anticipation of potential tariffs on copper, which led to a surge in copper prices on the New York Mercantile Exchange (Comex) [1] - In August, former President Trump decided against imposing tariffs on bulk copper, instead targeting value-added copper products, while still leaving the possibility of tariffs on raw copper starting in 2027 [1]