[Copper Prices Enter a Critical Month as Trump Administration's Import Tariff Plans May Become Clearer] Jin10 Data reported on June 1 that data shows copper prices rose in New York and London on Monday, kicking off a pivotal month that is expected to reveal more details about the Trump administration's plans to impose tariffs on imported metals in the U.S. The U.S. Secretary of Commerce must submit the latest recommendations on refined copper tariffs to Trump by June 30. Ahead of this decision, the premium of U.S. prices relative to other regions around the world has expanded again, prompting metals to flow back to U.S. ports. This adds additional supportive factors to keep copper prices elevated, which already rose 5% in May. Efforts to negotiate a ceasefire between the U.S. and Iran have also driven metal prices higher, while enthusiasm for artificial intelligence-related assets has spilled over into the copper market. Goldman Sachs has raised its outlook for copper prices on the London Metal Exchange, increasing its year-end forecast by more than 10%, as the firm believes U.S. stockpiling and weaker-than-expected mine supply will keep the market tight. The firm stated that copper prices will reach $13,735 per ton by the end of 2026, compared to its previous forecast of $12,465 per ton.