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NEW YORK (AP) — A look at the 10 biggest percentage decliners on Nasdaq at the close of trading:
Questcor Pharmaceuticals Inc. fell 36.7 percent to $19.08.
BioFuel Energy fell 16.7 percent to $5.95.
Parametric Sound Corp. fell 13.1 percent to $7.75.
Veeco Instruments Inc. fell 10.2 percent to $31.40.
Vivus Inc. fell 9.7 percent to $18.96.
Facebook Inc. fell 9.1 percent to $20.79.
GT Advanced Technologies Inc. fell 8.6 percent to $5.93.
Southern First Bancshares Inc. fell 8.5 percent to $8.70.
Performant Financial Corp. fell 8.3 percent to $9.87.
First Federal Bancshares of Arkansas Inc. fell 8.2 percent to $9.86.