A look at the 10 biggest percentage gainers on New York Stock Exchange at 1 p.m.:

Newpark Resources Inc. rose 14.9 percent to $13.40.

SolarWinds Inc. rose 10.8 percent to $43.84.

Stanley Works rose 6.6 percent to $90.60.

Universal Health Services Inc. rose 6.5 percent to $103.89.

Tenet Healthcare Corp. rose 6.5 percent to $52.42.

Deckers Outdoor Corp. rose 6.1 percent to $90.40.

Primero Mining Corp. rose 6.0 percent to $7.90.

Nustar GP Hldgs rose 4.8 percent to $43.31.

LyondellBasell Industries NV class A rose 4.7 percent to $107.20.

Cliffs Natural Resources Inc. rose 4.5 percent to $15.71.