Here's a look at stocks in the S&P 1,500 index displaying unusual volume in Friday's trading session.
S&P 500: Trading volume in Electronic Arts is up 120 percent over its 10-day average, on news that Zynga recruited one of EA's executives, Barry Cottle, as vice president of business and corporate development. Additionally, NPD reported late Thursday that US videogame sales in the industry dropped 21 percent in December.
S&P MidCap 400: Rovi volume jumped nearly 400 percent over its 10-day average, after the digital services provider forecast better-than-expected revenue figures and announced it will sell its Roxio product line to Canada's Corel.
S&P SmallCap 600: JDA Software volume rose almost 600 percent over its 10-day average, as the supply-chain management software company warned of its fourth-quarter revenue outlook, due in part to lower license sales in North America.
Here is a look at other companies displaying high volume.
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