Activision Blizzard rose as its latest "Call of Duty" video game had sales of more than $500 million in the first day of its release.
Allergan gained ground after the maker of Botox said it would buy privately held SkinMedica for $350 million.
JM Smucker fell after the company said it needs to lower prices because of increased competition.
Flowers Foods moved higher as rival Hostess Brands said it would cease operations.
Ruckus Wireless moved lower in its first day of trading after pricing at $15 a share, the top end of its range.
Dynavax plummeted after an FDA panel gave a negative report on its experimental hepatitis B drug, saying there was insufficient data to adequately support the safety of the drug.
Isle of Capri, Boyd Gaming and Las Vegas Sands all moved higher in sympathy with Penn Gaming which moved higher after saying it would split into two separate publicly traded companies.
Green Mountain gained ground after Dougherty and Co. upgraded the company to "buy" from "neutral."
Netflix lost ground after Albert Fried began coverage with an "underperform" rating.
Windstream and Frontier Communications moved lower after Goldman Sachs downgraded both to "sell" from "neutral."
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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