Traders work on the floor of the New York Stock Exchange (NYSE) in New York.

Check out which companies are making headlines before the bell:

Dollar General – The discount retailer matched forecasts with adjusted quarterly profit of $1.48 per share, while revenue was slightly below estimates. However, same-store sales increased by 3.3 percent, better than the 2.7 percent increase predicted by analysts surveyed by Thomson Reuters, and the company also announced an increase in its quarterly dividend to 29 cents per share from 26 cents.