President Donald Trump's threats to impose high tariffs on countries make U.S. trading partners and investors nervous. But his sector tariffs could hurt consumers and businesses more in the long run.

President hardens stance on trade deadline, Nvidia gets closer to record $4 trillion market value, and more news to start your day.

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 the president made earlier this year, when he ordered an investigation into how imports of the metal were affecting national security.