U.S. Treasury's Mnuchin says he has learned his lesson on dollar comments

LONDON (Reuters) - U.S. Treasury Secretary Steven Mnuchin said on Saturday he had learnt the hard way to be guarded in his comments on the dollar after roiling financial markets in 2018 by breaking from the usual language about the currency."I support a stable dollar but I'm not going to make more comments on that," he said at an event held at the Chatham House think tank in London.Two years ago at the World Economic Forum in Davos, Mnuchin sent the U.S. currency reeling when he said he..