NEW YORK (AP) -- A look at the 10 biggest percentage gainers on New York Stock Exchange at 1 p.m.:
Imperial Holdings Inc. rose 47.0 percent to $5.85.
Build-A-Bear Workshop Inc. rose 29.5 percent to $6.54.
Yelp Inc. rose 26.1 percent to $31.91.
OM Group rose 16.3 percent to $26.92.
Tower International Inc. rose 14.2 percent to $18.30.
Inphi Corp. rose 13.8 percent to $10.47.
Hornbeck Offshore Services Inc. rose 12.7 percent to $49.16.
Tutor Perini Corp. rose 12.3 percent to $17.95.
Orion Marine Group rose 11.6 percent to $9.93.
Beazer Homes USA Inc. rose 10.9 percent to $18.62.
