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

Fortuna Silver Mines Inc. rose 12.0 percent to $5.12.

Demand Media Inc. rose 10.5 percent to $7.86.

InterOil Corp. rose 9.0 percent to $37.11.

Tesoro Corp. rose 8.9 percent to $21.00.

McMoRan Exploration Co. rose 8.7 percent to $9.83.

Alpha Natural Resources Inc. rose 8.6 percent to $18.94.

Teck Resources Ltd. rose 8.2 percent to $31.66.

IMAX Corp. rose 8.1 percent to $15.57.

Invacare Corp. rose 8.0 percent to $23.69.

Suncor Energy Inc. rose 8.0 percent to $26.04.

Copyright 2011 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.