Take a look at some of Friday's midday movers:
Barnes & Noble fell after the book seller said the SEC is investigating its restatement of earnings announced in July.
American Eagle Outfitters fell after the teen-clothing retailer warned it would report weaker-than-expected earnings in its current quarter.
Google hit an all-time high. The stock up about 50 percent this year.
Phillips 66 rose after announcing a $2 billion stock-buyback program.
Intuitive Surgical rose after Jefferies began coverage with a buy rating.
PNC Financial Services gained after it said it would pay Freddie Mac $89 million to settle all mortgage disputes.
Theravance climbed on news it and GlaxoSmithKline's asthma drug showed improved lung function in a late-stage trial.
Nokia rose as JPMorgan reinstated coverage with an overweight rating.
Family Dollar Stores fell after Sterne Agee downgraded the stock to underperform from neutral.
Infosys gained after Cowen upgraded the stock to outperform from market perform.
SodaStream declined as Longbow Research downgraded the stock to neutral from buy.
Alaska Air fell after Deutsche Bank downgraded the carrier to sell from hold.
Pandora declined following reports that Spotify will offer a free mobile version of its service.
Boston Scientific rose as Cowen raised its rating on the medical-device maker to outperform from market perform.
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—By CNBC's Rich Fisherman.
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