Wall St opens lower on pressure from elevated Treasury yields

U.S. main stock indexes opened lower open on Monday, as sparse trading volumes and the specter of rising Treasury yields cast a cloud over the traditionally strong year-end rally for equities.

The Dow Jones Industrial Average DJI fell 128.3 points, or 0.30%, at the open to 42,863.86. The S&P 500 SPX fell 50.2 points, or 0.84%, at the open to 5,920.67​, while the Nasdaq Composite IXIC dropped 261.6 points, or 1.33%, to 19,460.413 at the opening bell.