Updated at 4:15 p.m. ET
The Dow Jones industrial average lost 459 points Monday, falling 1.9 percent, as tech stocks led the markets down and investors eyed growing trade tensions with China. Earlier in the day, the Dow was down more than 700 points.
Amazon tumbled more than 5 percent after President Trump criticized the company in tweets. The tech-heavy Nasdaq index lost 2.7 percent. The S&P 500 index lost 59 points, or 2.2 percent.