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

The Medicines Company (symbol: MDCO) was one of the worst losers of the
trading day today (2016-10-06), losing -8.26%. The number of shares that
changed hands was 9,501,800, or about 11 times the average daily volume in
the stock.
The closing price was $35.33, amounting to a market cap of $2,460,000,000,
about -17.84% off the highest price in the last 12 months. The stock has
been trading at a range between $27.5 and $43.0.
MDCO is in the Major Pharmaceuticals industry, part of the Health Care
sector. It first went public in 2000.