Take a look at some of Thursday's midday movers:
Microsoft - Shares of the software maker rose 3.1 percent after Morgan Stanley said its MSFT's Office software, expected to be unveiled next week, for Apple's iPad, could bring in $1.2 billion in billings a year.
Tesla Motors - The electric-car maker rose 0.8 percent after The Associated Press reported Arizona is considering legislation that would let Tesla sell cars in that state without setting up a dealer network.
ConAgra Foods - Shares gained 1.5 percent after the maker of ketchup and beef jerky reported quarterly profit that topped analysts' reduced estimates.
ExOne - Shares of the 3-D printer maker declined 9.3 percent after it reported a fourth-quarter loss and its full-year revenue outlook missed estimates.
Walter Energy - Shares of the producer of metallurgical coal used for making steel fell 14 percent after Bank of America cut its price target for the company, along with Arch Coal, Peabody Energy and Alpha Natural Resources.
Guess - The apparel retailer's shares declined 5.4 percent after it projected full-year earnings and revenue below expectations.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Kate Gibson.
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