The S&P 500 and Nasdaq closed with modest declines on Friday, while the US Food and Drug Administration granted an emergency use authorization for the Pfizer's coronavirus vaccine.
Tesla Inc slipped 1.9pc and was one of the top drags on the tech-skewed Nasdaq after the electric-car maker unveiled a $5 billion capital raise, its second such move in three months.
At 9:34 a.m. ET, the Dow Jones Industrial Average was down 67.35 points, or 0.22pc, at 30,150.91, the S&P 500 was down 6.65 points, or 0.18pc, at 3,692.47, and the Nasdaq Composite was up 23.40 points, or 0.19pc, at 12,487.63.