After a few minutes of trading, the Dow Jones Industrial Average is down 0.8 percent, the broad S&P 500 is down 0.7 percent, and the tech-heavy Nasdaq Composite is down 0.7 percent.
The decline on major European stock exchanges is greater. The London Stock Exchange is down 1.6 percent, while Frankfurt and Paris are down 2.8 and 2.3 percent, respectively.
