Dow falls over 2 percent at open as volatility rises

(Reuters) - The Dow Jones Industrial Average opened almost another 2 percent lower on Tuesday after two days of heavy losses that have undermined faith in the U.S. stock market's almost decade-long rally.

The Dow Jones Industrial Average <.DJI> fell 536.97 points, or 2.21 percent, to 23,808.78. The S&P 500 <.SPX> lost 49.06 points, or 1.85 percent, to 2,599.88 and the tech-heavy Nasdaq Composite <.IXIC> dropped 128.97 points, or 1.85 percent, to 6,838.56.

(Reporting by Tanya Agrawal; Editing by Arun Koyyur)