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 point 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 mine section 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 copper ore supply also boosted copper prices. In addition, Trump has now reopened a 90-day window for trade negotiations with the EU.