Donald Trump announced a 50 percent tariff on copper, a move that is sure to slow production and make prices skyrocket.

The president has published just 22 letters, many to minor trading partners like Brunei, Moldova and Sri Lanka.

President Donald Trump says he will put a 50% tariff on copper imports before noting the value of the versatile metal.

US President Donald Trump is considering significant tariffs, potentially 200% on pharmaceuticals and 50% on copper imports, ...

Copper shipments into the United States are expected to accelerate in the coming weeks in a final scramble to get metal ...

President Donald Trump announced Wednesday that a 50 percent tariff on US imports of copper, a key metal for green energy and ...

President Donald Trump has announced that the U.S. will impose a 50% tariff on imported copper, marking a significant ...

U.S. President Donald Trump's announcement of a proposed 50% tariff on copper imports has raised concerns in Chile and Peru, ...

Copper prices in the United States jumped more than 12% to a record high above $12,330 per metric ton after U.S. President ...

President Donald Trump on Wednesday affirmed that the United States will levy a 50 percent tariff on copper imports starting ...

CNBC's Steve Sedgewick, Karen Tso and Julianna Tatelbaum discuss the copper market after U.S. President Donald Trump says he ...

Metals are the latest market upended by President Donald Trump after he confirmed long-touted plans to impose a 50% import ...