FedEx tumbled after issuing a grim outlook.
The Dow Jones Industrial Average fell 37.79 points, or 0.10%, at the open to 37,520.13.
The S&P 500 opened lower by 3.64 points, or 0.08%, at 4,764.73, while the Nasdaq Composite dropped 29.86 points, or 0.20%, to 14,973.36 at the opening bell.
More to come....