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

AMAG Pharmaceuticals, Inc. (symbol: AMAG) was one of the worst losers of
the trading day today (2016-05-03), losing -14.21%. The number of shares
that changed hands was 3,837,174, or about 3 times the average daily volume
in the stock.
The closing price was $22.03, amounting to a market cap of $765,500,000,
about -71.66% off the highest price in the last 12 months. The stock has
been trading at a range between $20.22 and $77.73.
AMAG is in the Major Pharmaceuticals industry, part of the Health Care
sector.
Looking at its valuation, the stock is now trading at 23.69 times earnings.