$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 (2015-11-03), losing -23.2%. The number of shares
that changed hands was 9,021,360, or about 8 times the average daily volume
in the stock.
The closing price was $31.61, amounting to a market cap of $977,540,000,
about -59.33% off the highest price in the last 12 months. The stock has
been trading at a range between $28.48 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 5.58 times earnings.