Check out which companies are making headlines before the bell:
Wal-Mart—The retail giant said its Walmart.com site processed record orders on Cyber Monday.
FedEx—Bank of America/Merrill Lynch added the stock to its "US1" list, pointing to benefits of lower fuel prices as well as the company's profit improvement plan.
Stryker—Goldman Sachs added the medical device maker to its "conviction buy" list, as part of an overall upgrade of the sector to "attractive" from "neutral." Goldman said industry profit margins are growing thanks to consolidation, and that Stryker and Hill-Rom are best positioned to capitalize on cyclical tailwinds.
Priceline Group—The travel website operator's stock was downgraded to "market perform" from "outperform" at FBR, which cites expectations of slower earnings growth.
Corning—The company struck a deal to the fiber optics business of Samsung Electronics for an undisclosed price. The transaction is expected to close by the end of 2015's first quarter.
ComScore—SunTrust initiated coverage of the online research firm's stock with a "buy" rating, noting that comScore is on the front end of a product cycle that should drive growth at least through 2016.
Mattress Firm—The company matched Street estimates with adjusted profit of 70 cents per share. The mattress retailer also raised its full-year revenue guidance, although recent acquisitions have raised its costs and hurt its bottom line.
Thor Industries—The recreational vehicle maker fell 8 cents shy of estimates with fiscal first quarter profit of 73 cents per share, although revenue was above expectations. Thor's profit margins fell from a year earlier, due in part to a tight labor market and other employee-related costs.
Royal Caribbean—The cruise line operator's stock will replace Bemis in the S&P 500 after the close of business on Thursday. Bemis will move to the S&P Midcap 400, with S&P noting that the company's market capitalization is more representative of the midcap market space.
Norwegian Cruise Line—Barclays reinstated coverage of the cruise line operator with an "overweight" rating, saying the acquisition of Prestige Cruises is a "strong strategic positive."
Aviva—The insurance company finalized a deal to buy rival British insurer Friends Life in an $8.8 billion stock deal. Plans for the deal had been announced on November 24.
Avanir Pharmaceuticals—The drug maker is being bought by Japan's Otsuka Pharmaceutical for $17 per share in cash, or about $3.5 billion.
Spansion—The memory chip producer will be bought by Cypress Semiconductor in a stock swap deal that values Spansion at approximately $1.6 billion. Pacific Crest has now upgraded Cypress to "outperform" from "sector perform," on optimism about the benefits of the Spansion deal.
Blackstone—The asset manager is selling industrial real estate unit IndCor Properties to Singapore sovereign wealth fund GIC for $8.1 billion.