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

Anacor Pharmaceuticals, Inc. (symbol: ANAC) was one of the worst losers of
the trading day today (2016-03-31), losing -8.88%. The number of shares
that changed hands was 4,211,889, or about 4 times the average daily volume
in the stock.
The closing price was $53.45, amounting to a market cap of $2,360,000,000,
about -65.94% off the highest price in the last 12 months. The stock has
been trading at a range between $52.02 and $156.93.
ANAC is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2010.