NEW YORK (AP) -- A look at the 10 biggest percentage decliners on Nasdaq at the close of trading:
XenoPort Inc. fell 15.3 percent to $5.72.
Lumos Networks Corp. fell 7.8 percent to $15.07.
Parametric Sound Corp. fell 7.8 percent to $17.69.
OSI Systems Inc. fell 7.6 percent to $61.30.
Raven Industries Inc. fell 7.5 percent to $31.85.
Anacor Pharmaceuticals Inc. fell 7.1 percent to $5.66.
Barrett Business Services Inc. fell 6.8 percent to $57.97.
Sangamo BioSciences Inc. fell 6.8 percent to $7.86.
Consumer Portfolio Services Inc. fell 6.7 percent to $8.40.
Howard Bancorp Inc. fell 6.6 percent to $7.21.
