Check out which companies are making headlines before the bell:
Wal-Mart Stores, Target, Amazon.com — These and other retailers will be stocks to watch today, with the National Retail Federation saying U.S. holiday shopping is on track for a 3.7 percent rise this year. That's been largely boosted by online sales.
Lululemon — The yoga wear maker was downgraded to "underperform" from "market perform" at FBR, citing elevated inventories and various supply chain issues.
American Eagle — Oppenheimer downgraded the teen apparel retailer to "perform" from "outperform" on a valuation basis, noting that the shares have jumped 35 percent since last December while its peer group was down 9 percent.
Lions Gate Entertainment — The movie studio's "The Hunger Games: Mockingjay – Part 2" topped the Thanksgiving weekend box office with $75.8 million in ticket sales, bring its domestic total to $198.3 million.
Office Depot, Staples — Regulators are leaning toward blocking the proposed takeover of Office Depot by Staples, according to a report in the New York Post. The Federal Trade Commission has until December 8 to decide whether or not to sue to block the deal, which it fears would create a too-dominant player in the office supplies market.
Facebook — Facebook is expanding its paid parental leave policy to full-time employees outside the United States, giving all new parents four months of paid time off.
Tribune Publishing — Tribune will sell its newspaper group to a Wall Street firm, according to tweet from News Corp. co-chairman Rupert Murdoch, who also said the Los Angeles Times will be split off from the group and sold to local investors.
Vale — The Brazilian mining company said toxic materials like arsenic were found in river water after a dam burst at a mine Vale co-owns with BHP Billiton. The Brazilian government said it is planning to file a multi-billion dollar lawsuit against the mine-owning partners.
Fitbit — The maker of wearable fitness devices was upgraded to "overweight" from "equal-weight" at Barclays, with the firm citing valuation after its recent 26 percent slide over the past 30 days. Barclays said Fitbit is a proven company and that the slide was unjustified.
General Dynamics — The defense contractor was upgraded to "overweight" from "equal-weight" at Barclays, with the firm downgrading rivals Raytheon and Lockheed Martin. Raytheon is now rated "equal-weight" while Lockheed is rated "underweight." It cites valuation among the reasons for the two downgrades, while saying General Dynamics has the best risk/reward profile in the group after concerns related to the business jet segment weighed on the stock's price.
Philip Morris — The tobacco producer was upgraded to "neutral" from "reduce" at Nomura, noting encouraging industry volume trends and an accelerated rollout of so-called "reduced-risk" products.