Midday Movers: GameStop, Microsoft, Nasdaq OMX & more

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Take a look at some of Tuesday's midday movers:

FutureFuel - Shares of the biodiesel producer jumped 16 percent after posting fourth-quarter results that topped expectations.

General Motors - The auto manufacturer climbed after Chief Executive Officer Mary Barra promoted an engineering executive to a newly created vehicle-safety job in response to flawed ignition switches tied to 12 deaths and the recall of more than 1.6 million vehicles.

Hewlett-Packard - The computer maker gained 3.4 percent after Barclays hiked its rating on the company to overweight from equal weight.

Microsoft - Shares rose to their highest level since July 2000 after reports cited unidentified sources as saying the software company might unveil Office for iPad later this month.

GameStop - The video-game maker fell 4.8 percent after Wal-Mart Stores said customers can trade video games for store credit.

Michael Kors Holdings - Shares of the luxury retailer dropped 2.2 percent after Barclays began coverage with an underweight rating.

Nasdaq OMX - Shares declined 3.6 percent after New York Attorney General Eric Schneiderman said in prepared remarks that stock exchanges need to curb services that give unfair advantage to high-frequency traders.

Shutterfly - Shares of the online photo company fell 6.1 percent after Cowen downgraded its shares to underperform from outperform.

(Read more: See CNBC's Market Insider Blog)

—By CNBC's Kate Gibson.

Questions? Comments? Email us at marketinsider@cnbc.com

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