Among the stock activity stories for Friday, Feb. 22, from The Associated Press:

— Shares of Jakks Pacific Inc. fell after a Stifel Nicholas analyst downgraded the stock to "Hold" from "Buy." The toy company is grappling with major shifts in the industry.

— Volcano Corp. shares tumbled to a 3-year low after the medical device maker issued a lower-than-expected 2013 guidance.

 

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