Currencies rise and fall all the time because of inflation fears, central bank moves and other factors. But economists worry that the recent drop in the dollar is so dramatic that it reflects something more ominous as President Donald Trump tries to reshape global trade: a loss of confidence in the U.S.

As President Donald Trump's tariffs threaten the US economy, questions are being asked about how long the dollar can maintain its status as the world's key trading and reserve currency. - The dollar initially gained on news of Trump's tariffs owing to concerns the levies will push up inflation.