Going into the afternoon trade, the S&P is still weaker on the day, but off the lows.

The biggest percentage movers are:

TIII    Tii Network Technologies Inc    2.07    42.76%
GOLF    Golfsmith Intl Holdings Inc    6.05    28.45%
QTWW(F)    Quantum Fuel Sys Tech    0.52    26.48%
VTUS    Ventrus Biosciences Inc    13.18    20.24%
GRPN    Groupon Inc Class A    11.79    19.13%
XNPT    XenoPort Inc    5.86    12.47%
KERX    Keryx Biopharmaceuticals    2.13    12.43%
SYNC    SYNC    10.35    12.01%
HZNP    Horizon Pharma Inc    4.09    11.31%
AGEN    Agenus, Inc.    6.36    10.99%