Wall St set to open flat as investors digest Fed comments

Wall Street was set to open flat on Monday as investors pondered the timing of the next interest rate hike following comments from top Federal Reserve officials. Fed Chair Janet Yellen said on Friday the case for a rate increase was getting stronger, but provided little detail on when the central bank would next move. Vice Chair Stanley Fischer, in an interview with CNBC the same day, suggested that a move as soon as next month could be possible.