A sharp slide for Walmart on Thursday helped pull Wall Street off of its record. The S&P 500 slipped 0.4% for its first drop after setting all-time highs in each of the last two days. The Dow Jones Industrial Average lost 450 points,

The S&P 500 flirts with a record as U.S. stock-market investors return from a three-day weekend, awaiting minutes from the Federal Reserve's January meeting and data due later this week.