Benzinga's Top Pre-Market Losers
September 20, 2013 at 08:18 AM EDT
Prosensa Holding NV (NASDAQ: RNA ) dipped 74.54% to $6.11 in the pre-market session on failed duchenne muscular dystrophy study. AK Steel Holding (NYSE: AKS ) shares fell 10.59% to $3.97 in the pre-market trading after the company projected wider loss for the third quarter. Sarepta Therapeutics (NASDAQ:
