U.S. President Donald Trump on Wednesday issued a blitz of tariff announcements ranging from changes to previously threatened levies on imports of copper, goods from Brazil and South Korea, to ending an exemption from tariffs for small-value shipments from overseas.

President Donald Trump signed executive actions on Wednesday imposing a 50% tariff on Brazil, a 50% tariff on certain copper products and suspending a tax perk for all countries that allowed cheap packages to fly into the US duty-free.

The US copper market suffered its largest intra-day fall on record after President Donald Trump shocked traders by exempting the most widely imported form of copper from his planned tariffs.