$SRPT is one of biggest losers #stocks today. read more:

Sarepta Therapeutics, Inc. (symbol: SRPT) was one of the worst losers of
the trading day today (2016-01-21), losing -9.73%. The number of shares
that changed hands was 3,011,754, or about 2 times the average daily volume
in the stock.
The closing price was $11.97, amounting to a market cap of $541,890,000,
about -71.48% off the highest price in the last 12 months. The stock has
been trading at a range between $11.52 and $41.97.
SRPT is in the Major Pharmaceuticals industry, part of the Health Care
sector.