The S&P 500 index opened with a modest increase of 1.8 points, or 0.03%, reaching 6,979.12 on Tuesday. In contrast, the Nasdaq Composite saw a slight decline, opening down 4.92 points, or 0.02%, at 23,728.98. Meanwhile, the Dow Jones Industrial Average experienced a more significant drop, opening 85.21 points lower, or 0.17%, at 49,504.99.