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

Tekmira Pharmaceuticals Corp. rose 14.0 percent to $23.60.

Mattress Firm Holdings rose 13.4 percent to $54.42.

Professional Diversity Network Inc. rose 13.2 percent to $5.69.

Applied Genetic Tech rose 12.0 percent to $19.75.

Willdan Group rose 10.0 percent to $9.55.

Insys Therapeutics Inc. rose 9.8 percent to $31.03.

Diversicare Hlthcre rose 9.5 percent to $7.98.

Erickson Air-Crane Inc. rose 9.0 percent to $13.77.

Liquidity Services Inc. rose 9.0 percent to $14.47.

China XD Plastics rose 8.9 percent to $5.82.