Glencore, the Swiss mining and metals trading giant that mines copper in Ontario and processes it in Quebec, both imports ...

US President Donald Trump released a fresh set of letters to trading partners Wednesday, setting out tariff rates for six countries as Washington pushes to bring ...

U.S. copper prices vaulted to an all-time high after President Trump said Washington will slap imports of the metal with a 50 ...

A tariff of that size would match the rate the Trump administration already imposed on imports of steel and aluminum in June. If implemented, the copper tariff could hugely impact America's adoption ...

None of the countries targeted in the first batch of letters — the Philippines, Brunei, Moldova, Algeria, Libya, Iraq and Sri Lanka — is a major industrial rival to the U.S.