Fed jitters and oil pull Wall Street lower; Apple rallies

Wall Street edged lower on Wednesday as investors stewed about future interest rate hikes and cheaper oil dragged down energy shares, although Apple surged to its highest level this year. Speculation about the timing of the Federal Reserve's next interest rate hike has shaken major stock indexes following contrasting comments from Fed officials. The S&P 500 remains down almost 3 percent from before a steep selloff on Friday, even though interest rate futures indicate expectations for a rate