Sarepta Therapeutics (SRPT) volatility pulls back on sharp rally on FDA approval

Sarepta Therapeutics (NASDAQ: SRPT) is recently up $2.05 to $50.99 in the premarket after saying it sees the U.S. annual cost of eteplirsen at $300,000, a day after rallying 73% on the FDA approval of eteplirsen. September weekly call option implied volatility is at 145, October is at 88; compared to its 52-week range of 79 to 399.

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