Stocks plunged Thursday, sending the Dow industrials tumbling more than 300 points, as fresh worries about impeachment added to uneasiness over a growing global economic crisis and its impact on U.S. corporate profits.

The selloff extended Wednesday's losses and threatened to wipe out all of Tuesday's record gain.The Dow Jones industrial average, up 380.53 points Tuesday then down 155.76 on Wednesday, was off 311.53 at 7,553.49 in afternoon trading. That brought losses for the past two sessions to 467.29 points.

Broader indicators also were lower in heavy trading and shares were sinking sharply in Latin America and closed with big losses in Europe.

In the rush out of stocks, there was a surge in the market for U.S. Treasury bonds - a traditional haven for cash in times of unrest. Yields on 30-year Treasury bonds, which move in the opposite direction of prices, fell to 5.17 percent. If that holds, it would be the lowest since the government first began regular sales of those securities in 1977.

In Sao Paulo, Brazil, trading temporarily stopped at Latin America's largest exchange after a 10 percent plunge in its main index after 67 minutes of trading.

Stocks also skidded lower in Europe, with the major index finishing down 5.8 percent in Germany, a major trading partner of beleaguered Russia. Shares closed down 3.3 percent in London, Europe's largest market, and were off 4.6 percent in Paris.