Take a look at some of Friday's midday movers:
Whole Foods Market - The company's shares jumped after Morgan Stanley upgraded the stock to “overweight” from “equal weight,” and said it sees earnings growing 19 percent annually to 2015.
Healthnet - Healthnet shares tumbled after it cut its 2012 outlook. Shares came off their lows after its CEO said in a conference call he sees meaningful growth in 2013.
Wellcare Plans - Wellcare shares slumped, despite raising its 2012 outlook after the company said its medical expenses grew to 86 percent of revenue, up from 81 percent a year ago.
Interpublic - Interpublic shares moved higher following speculation Publicis may be considering a bid.
Globus Medical - Globus rose on its first day of trading. This after the medical device maker lowered its target pricing range to $12 to 13 from $16 to 18.
Knight Capital - Knight rebounded after The Wall Street Journal reported the embattled firm obtained a credit line that will allow it to continue to operate.
Molycorp - Molycorp shares fell after the rare-earth mining company’s posted a second-quarter loss.
Synaptics - Synaptics gained ground after the touch-screen technology company’s fourth-quarter and and fiscal 2012 earnings beat Street forecasts.
ViaSat - ViaSat lost ground after its first-quarter earnings missed Street expectations.
PerkinElmer - PerkinElmer moved higher after its second-quarter earnings rose 13 percent. The company posted double-digit revenue growth in its health business.
Obagi Medical - Its shares fell after the sink products maker told analysts it isn’t for sale.
ON Semiconductor - ON Semi shares lost ground after the chipmaker forecast weak revenue for the current quarter and said its chief financial officer resigned.
Blyth - Blyth shares moved higher after the company boosted its 2012 outlook.
Spartan Stores - Its shares fell after the regional grocery distributor reported weak first-quarter results and warned it sees lower same-store sales in second quarter.
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