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.

January, the dollar has fallen 9% against a basket of currencies, a rare and steep decline, to its lowest level in three years — a drop that raises concerns investors may be losing confidence in the U.

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.