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

Wabash National Corp. rose 21.7 percent to $7.68.

Prestige Brands Holdings Inc. rose 13.7 percent to $19.77.

Radian Group rose 13.5 percent to $5.33.

AVG Technologies N.V. rose 13.0 percent to $11.85.

Circor International Inc. rose 12.7 percent to $38.87.

SM Energy Co. rose 12.0 percent to $60.39.

Heartland Payment Systems Inc. rose 11.1 percent to $28.98.

RTI International Metals Inc. rose 10.3 percent to $25.14.

MDC Holdings Inc. rose 9.9 percent to $42.01.

Aeropostale Inc. rose 9.2 percent to $13.05.

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