NEW YORK (AP) â¿¿ A look at the 10 biggest percentage gainers on New York Stock Exchange at 1 p.m.:

National Semiconductor Corp. rose 71.5 percent to $24.13.

Abercrombie & Fitch Co. rose 10.9 percent to $65.60.

Endeavour Silver Corp. rose 7.7 percent to $10.96.

First Majestic Silver Corp. rose 7.6 percent to $25.30.

Olin Corp. rose 6.7 percent to $24.71.

US Gold Corp. rose 6.3 percent to $9.50.

Fairchild Semiconductor International Inc. rose 6.2 percent to $18.76.

"Pep Boys -- Manny, Moe & Jack" rose 6.0 percent to $13.70.

Coeur d'Alene Mines Corp. rose 5.9 percent to $36.91.

Retail Ventures Inc. rose 5.7 percent to $18.71.
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