In Wednesday trading, the Dow Jones industrial average closed down 313 points, or more than 2 percent, to 12,933.
The Nasdaq dropped 75 points, or 2.5 percent, to 2,937.
The S&P 500 fell 34 points, or more than 2 percent, to 1,395.
The LABJ Stock Index fell 2 points, or nearly 2 percent, to 134.
