Check out which companies are making headlines before the bell:
Apple — A court hearing scheduled for today was canceled, with federal authorities saying they may have a way to obtain information from the iPhone of the shooter in the San Bernardino terror attack without Apple's help. The court hearing had been scheduled to decide whether Apple should be compelled to provide help.
Mattress Firm — Mattress Firm reported adjusted quarterly profit of 53 cents per share, missing estimates by 3 cents, while revenue was also below estimates. The mattress retailer also gave a current quarter earnings outlook well below expectations, and named President Ken Murphy as its new CEO.
Dick's Sporting Goods — The sporting goods retailer announced a $1 billion share repurchase program, to take place over the next five years.
Petrobras — Petrobras reported a record quarterly loss, after it wrote down various assets in the face of slumping oil prices. The Brazilian state oil company posted a loss of $10.2 billion for the fourth quarter.
General Electric — GE signed a memorandum of understanding with the Cuban government, intending to sell power, aviation, and medical equipment in that country.
Yahoo — Yahoo was downgraded to "neutral" from "buy" at Citi, noting a recent 22 percent jump in the stock's price and saying the shares now reflect value in a possible spinoff or sale of assets.
Abercrombie & Fitch — Abercrombie & Fitch was named a "franchise pick" at Jefferies, which said the teen apparel retailer will benefit from improving industry trends and a more favorable cost structure, among other factors.
Zillow Group — RBC upgraded the real estate website operator to "outperform" from "sector perform," following positive results from the firm's real estate survey as well as strong online traffic trends.
Starwood Hotels — RBC downgraded the hotel chain to "neutral" on a valuation basis, following Marriott's improved offer for its rival. RBC also said it sees at least 20 percent upside for Marriott over the next 12 to 18 months, with or without a Starwood deal.
Wynn Resorts — Morgan Stanley upgraded the casino operator's stock to "overweight" from "equal-weight," with a price target of $120 per share. Wynn and other casino companies that operate in Macau have been rebounding lately on the thought that the gaming slump there has bottomed out.