Stock index futures were down on Wednesday, as investors awaited more retail earnings and the Federal Reserve's latest meeting minutes. S&P 500 futures (SPX) -0.1%, Nasdaq 100 futures (US100:IND) -0.2%,

Wall Street's main indexes closed roughly flat on Monday, after struggling for direction while investors awaited a raft of corporate earnings reports from major retailers for more signs about the state of the economy and the Federal Reserve's annual symposium in Jackson Hole.

The tech sector was behind much of the market recovery from the April selloff, but investors have started to take stock of the elevated valuations, sending the S&P 500 and the Nasdaq to their worst day in more than two weeks on Tuesday.