- US Copper Tumbles as Trump’s Tariff Excludes Refined Metal Bloomberg
- Trump slaps universal 50% tariff on copper imports; metal’s price plunges CNBC
- ADJUSTING IMPORTS OF COPPER INTO THE UNITED STATES The White House (.gov)
- Copper Prices Crash After Trump Imposes Tariffs on Copper Products The Wall Street Journal
- Copper futures tumble as White House says refined metal exempt from 50% tariffs Yahoo Finance
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