U.S. stock indexes were muted in Friday’s shortened trading session for Thanksgiving, while investors focused on retailers as Black Friday sales kicked off amid signs of slowing economic conditions.

The Dow Jones Industrial Average rose 26.87 points, or 0.08 percent, at the open to 35,299.90. The S&P 500 opened lower by 0.78 points, or 0.02 percent, at 4,555.84, while the Nasdaq Composite dropped 27.82 points, or 0.20 percent, to 14,238.04 at the opening bell.