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

Momenta Pharmaceuticals, Inc. (symbol: MNTA) was one of the worst losers of
the trading day today (2016-02-18), losing -13.81%. The number of shares
that changed hands was 1,290,551, or about 2 times the average daily volume
in the stock.
The closing price was $9.92, amounting to a market cap of $675,350,000,
about -61.19% off the highest price in the last 12 months. The stock has
been trading at a range between $9.85 and $25.56.
MNTA is in the Biotechnology: Biological Products (No Diagnostic
Substances) industry, part of the Health Care sector. It first went public
in 2004.