Take a look at some of Tuesday's midday movers:
Tesla Motors - Shares of the electric car manufacturer surged after Morgan Stanley doubled its price target to $320 a share. The stock has risen 650 percent over the past 14 months.
InterMune - Shares surged after the company said its experimental lung disease drug yielded positive results in a late-stage trial.
BlackBerry - Shares rose after it unveiled a newer, cheaper touchscreen smartphone and a classic model with a keyboard. Blackberry CEO John Chen that he would sell his instant messaging unit for $19 billion if someone offered him that much for it.
Macy's - The department-store operator gained after reporting an 11 percent increase in fourth-quarter profit.
Target - Shares of the discount retailer edged higher after a House committee demanded copies of messages and documents showing when the company found out about a huge data breach late last year.
Visteon - The auto-parts maker edged higher after it reported a better-than-expected quarterly profit.
Office Depot - Shares sank after the office-supplies chain reported a net loss for the fourth quarter.
T-Mobile US - The mobile provider fell after reporting a bigger quarterly net loss and projected increased capital spending this year.
BioCryst Pharmaceuticals - Shares rose after the Food and Drug Administration accepted the new drug application for the company's Peramivir product.
Bristol-Myers Squibb - Shares edged lower after the company said the FDA had approved its drug for rare disorders involving loss of body fat.
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—By CNBC's Rich Fisherman.
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