The S&P 500 slipped 0.4% and is on track for a third straight modest loss after setting its all-time high last week. The Dow Jones Industrial Average was up 8 points, or less than 0.1%, as of 11:50 a.m. Eastern time, and the Nasdaq composite was down 1%.

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.