U.S. President Donald Trump on Tuesday said he would impose a 50% tariff on imported copper and soon introduce long-threatened levies on semiconductors and pharmaceuticals, broadening his trade war that has rattled markets worldwide.

Copper entering the US from other countries is set to face a new tax of 50%, President Donald Trump has said. The decision carries through on tariff threats he made earlier this year, when he ordered an investigation into how imports of the metal were affecting national security.

Trump imposes tariffs up to 40% on 14 countries, pressuring allies to shift production to the US and avoid ties with BRICS. Tensions mount globally.

President Donald Trump has sent letters to 14 countries outlining higher tariffs they’ll face if they don’t make trade deals with the U.S. by Aug. 1

Financial markets ignore the lack of clarity from the Trump administration over tariffs, though corporate America feels frustrated at the lack of direction. Mohamed El-Erian – Chief Economic Adviser at Allianz – explains what happens next.