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.

U.S. President Donald Trump's mooted 50% tariff on copper imports into America has sharply exacerbated what was already a dislocation between New York and London prices for the red metal. The chart sh

President Donald Trump said Tuesday he’s imposing a new 50% tariff on all copper. However, it’s unclear when the new tariff would take effect.