Investors were wary on Wall Street Tuesday as the Nasdaq Composite and Standard and Poor 500 made modest gains while the Dow Jones index plummeted

U.S. stocks tumbled to their worst day since an early August sell-off after another report raised worries about the economy's health

As Intel's market cap drops below $100 billion, the company's stock could be removed from the prestigious DJIA index.

The major U.S. stock market indexes sank the day after Labor Day. The Dow Jones Industrial Average dropped 1.5%, S&P 500 declined 2.1% and the Nasdaq Composite fell 3.3%. During the selloff, retail investors were quick to buy the dip.