Stocks that moved substantially or traded heavily Friday on the New York Stock Exchange and Nasdaq Stock Market:
Quiksilver Inc., up 30 cents at $2.74
The surf-inspired clothing and gear company said that it narrowed its second-quarter loss as revenue rose and costs dropped.
Alpha Natural Resources Inc., down 25 cents at $9.32
Citing falling demand for steam coal, the company plans to idle some of its plants and coal mines and reduce production at others.
Ferrellgas Partners LP, up $1.12 at $17.25
The propane distributor said that its fiscal third-quarter net income soared in comparison to the same quarter last year.
Thor Industries Inc., down 73 cents at $29.46
The maker of recreational campers and buses said that its third-quarter profit grew 3 percent, but its results missed expectations.
Navistar International Corp., up $4.25 at $28.36
A regulatory filing indicated that activist investor Carl Icahn boosted his stake in the truck and engine maker to 11.9 percent.
Red Robin Gourmet Burgers Inc., down 43 cents at $30.60
A Jefferies analyst downgraded shares of the restaurant chain to a "Hold" rating from "Buy" but raised its price target $6 to $32.
Monolithic Power Systems Inc., up $1.87 at $20
A Stifel Nicolaus analyst upgraded shares of the semiconductor company to "Buy" citing its revamped operations and new products.
Francesca's Holdings Corp., up $5.26 at $27.57
The women's clothing seller said that its first-quarter net income doubled and it posted a better forecast than was expected.
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