1611 GMT - U.S. tariff uncertainty continues to distort and tighten the global copper market, according to market watchers. Washington is expected to decide whether to extend import tariffs to refined copper, a move that could have significant implications for global supply flows. Last year, expectations of tariffs drove LME copper prices higher as U.S. buyers accelerated purchases and built inventories ahead of potential trade restrictions, reducing available supply elsewhere. "The upcoming U.S. Commerce Department report, due by the end of June, represents a potentially important catalyst," analysts at Saxo Bank say. "A recommendation supporting future tariffs could encourage further inventory accumulation ahead of implementation, while a decision not to proceed could trigger an unwinding of the current premium and some temporary pressure on prices." (giulia.petroni@wsj.com)
(END) Dow Jones Newswires
June 04, 2026 12:11 ET (16:11 GMT)
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