$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 (2016-05-04), losing -11.26%. The number of shares
that changed hands was 4,282,080, or about 3 times the average daily volume
in the stock.
The closing price was $19.55, amounting to a market cap of $679,320,000,
about -74.85% off the highest price in the last 12 months. The stock has
been trading at a range between $19.35 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 21.02 times earnings.