Wall Street fears international investors are losing faith in US policymaking - AP Photo/Richard Drew The US dollar is in free fall – but Donald Trump claims it is a good thing. Since January 19, the greenback has plunged by 3.19pc against a basket of other currencies and is now at a four-year low. On Tuesday alone, it fell again by almost 1pc. “I think it’s great,” the US president said at an event in Iowa yesterday. “Look at the value of the dollar. Look at the business we are doing. The dollar is doi ...