Another plunge in the price of oil pushed stocks sharply lower on Monday. Energy companies led the decline as crude dipped below $50 a barrel Monday. Other stocks also fell as traders worried that the drop could indicate a weaker global economy.

On Monday:

The Dow Jones industrial average fell 331.34 points, or 1.9 percent, to 17,501.65.

The Standard & Poor's 500 index dropped 37.62 points, or 1.9 percent, to 2,020.58.

The Nasdaq composite declined 74.24 points, or 1.6 percent, to 4,652.57.

For the year:

The Dow is down 321.42 points, or 1.8 percent.

The S&P 500 is down 38.32 points, or 1.9 percent.

The Nasdaq composite is down 83.48 points, or 1.8 percent.