
U.S. stocks closed up slightly amid volatile trading overnight on materials shares, as investors digested latest round of corporate earnings.
Dow Jones Industrial Average added 13.37 points at 15,555.61, while S&P 500 rose 4.31 points to 1,690.25.
Most key S&P sectors finished in positive territory, boosted by materials and utilities shares, while industrials closed flat.
Nasdaq composite gained 25.59 points at 3,605.19, its best gain in nearly two weeks.