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

Alkermes plc (symbol: ALKS) was one of the worst losers of the trading day
today (2016-01-21), losing -44.24%. The number of shares that changed hands
was 12,465,055, or about 13 times the average daily volume in the stock.
The closing price was $33.69, amounting to a market cap of $5,060,000,000,
about -58.26% off the highest price in the last 12 months. The stock has
been trading at a range between $33.66 and $80.71.
ALKS is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 1991.