SMM Copper Morning Briefing: After the US announced last Friday that it would impose a 50% tariff on goods from the EU, copper prices fell. However, as the US dollar index dropped to its lowest level in more than three weeks, copper prices rebounded and continued to rise. Meanwhile, Zijin Mining announced on the evening of May 23 that multiple mine tremors had occurred in succession at the Kakula ore block of the Kamoa-Kakula copper mine owned by the company. Following a decision by the management of Kamoa Copper, underground operations in the area have been suspended. Concerns over the copper mine also boosted copper prices.