Dow Jones opens flat as excitement over vaccine trial fades

The S&P 500 dipped at the open on Tuesday as excitement over signs of a first successful late-stage COVID-19 vaccine trial faded, while investors continued to pull money out of the big tech companies that have benefited most from the pandemic.

The Dow Jones Industrial Average was up 18.51 points, or 0.06%, at the open to 29,254.17.

The S&P 500 opened lower by 17.61 points, or 0.50%, at 3,532.89, while the Nasdaq Composite dropped 142.81 points, or 1.22%, to 11,570.97 at the opening bell.