The dollar drifted lower on Monday after an early bump off a three-year low, as investor confidence in the world’s reserve currency remained in question following a stream of tariff-related pronouncements from US President Donald Trump.Investors braced for another volatile week as Trump’s imposition and then abrupt postponement of tariffs on goods imported to the US continued to sow confusion.The dollar reversed early gains as the Asian trading session got under way, languishing near a 10-year low against the Swiss franc at 0.8188.Sterling held to most of its 1.7 per...