By Sinéad Carew NEW YORK (Reuters) – Wall Street stocks closed sharply lower and Treasury yields fell in Wednesday’s volatile session as oil prices rallied and investors worried about the potential for an economic slowdown. U.S. equity indexes had traded higher and lower during the volatile session as investors picked through U.S. inflation data for clues about the Federal Reserve’s rate hiking path. U.S. data showed higher-than-expected core inflation, excluding items such as oil prices. Some investors appeared encouraged by the annual consumer price growth change to 8.3% in April from 8.5% i…