U.S. inflation data is due out before the bell

With economists expecting that CPI rose 0.3% on month in April after increasing 0.2% in March. On year, inflation is seen accelerating to 2% from 1.5%. Anything more than that could again raise questions about when the Fed might want to start raising interest rates.As per Nomura economists,"We expect higher farm prices and seasonally adjusted gas prices to prop up headline CPI in April."