A look at the 10 biggest percentage gainers on Nasdaq at 1 p.m.:

La Jolla Pharm rose 20.1 percent to $10.75.

InterCloud Systems rose 16.1 percent to $6.50.

ClearSign Combustion Corp. rose 10.6 percent to $8.29.

Achillion Pharmaceuticals Inc. rose 10.1 percent to $7.74.

MYOS Corp. rose 9.7 percent to $14.26.

Glu Mobile Inc. rose 9.3 percent to $5.87.

SpartanNash Co. rose 8.2 percent to $22.08.

Xencor Inc. rose 6.6 percent to $10.75.

Turtle Beach Corp. rose 6.6 percent to $8.76.

Zeltiq Aesthetics Inc. rose 6.6 percent to $14.77.