Check out which companies are making headlines before the bell:
General Motors—The automaker announced four more safety recalls for a variety of issues, totaling about 428,000 vehicles in the United States. Separately, attorney Kenneth Feinberg will announce details of
Mannkind–The company received FDA approval for its inhalable diabetes treatment Afrezza. The approval comes three years after the FDA first asked for additional studies on the drug's effects.
Yahoo–The stock was upgraded to "overweight" from "neutral" at Piper Jaffray, with analyst Gene Munster saying the company's stake in Alibaba is undervalued at current levels.