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

Intuitive Surgical Inc. rose 14.6 percent to $449.59.

Hawaiian Holdings Inc. rose 12.6 percent to $14.60.

Neogen Corp. rose 12.3 percent to $41.51.

Genocea Bioscience rose 11.6 percent to $16.86.

Vascular Solutions Inc. rose 11.5 percent to $24.98.

Quidel Corp. rose 11.0 percent to $24.97.

Biogen Idec Inc. rose 10.6 percent to $335.81.

OncoMed Pharmaceuticals Inc. rose 10.3 percent to $24.23.

Pharmacyclics Inc. rose 9.6 percent to $105.90.

MacroGenics Inc. rose 9.2 percent to $22.01.