The dollar surged on Wednesday, after a report showing a much narrower than expected U.S. trade deficit in March. The trade gap narrowed to $54.99 billion in March from a revised $60.57 billion in February and well below economists' forecasts for a $61.5 billion deficit. Over about the last three years the trade deficit has been a big weight on the dollar. If Americans continued to buy foreign goods faster than U.S. businesses can sell their goods and services overseas, the outflow of dollars would remain heavy, putting pressure on the currency.