Prosensa Plunges 70% as Sarepta Soars

Shares of Prosensa (NASDAQ: RNA  ) , a biotech company developing the drug drisapersen for the treatment of Duchenne muscular dystrophy, or DMD), plunged 70% today after the company revealed that the drug failed to reach its goal in a late-stage clinical trial. The market valuation for Prosensa, which went public over the summer, plummeted on this news, while shares of its partner GlaxoSmithKline (NYSE: GSK  ) were not affected. Shares of its rival Sarepta (NASDAQ: SRPT  ) , however, have fluctuated throughout the day. Opinions differ on how this will affect the road to approval for Sarepta's eteplirsen, a competing experimental DMD medication. Analyst Max Macaluso discusses this news and its impact on all three players in the following video.

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Editor's note: At the time of this video, shares of Sarepta were up only 2%. The stock is now up 17% intraday.


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