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

bluebird bio, Inc. (symbol: BLUE) was one of the worst losers of the
trading day today (2016-10-14), losing -13.29%. The number of shares that
changed hands was 4,138,333, or about 4 times the average daily volume in
the stock.
The closing price was $56.57, amounting to a market cap of $2,100,000,000,
about -43.26% off the highest price in the last 12 months. The stock has
been trading at a range between $35.37 and $99.7.
BLUE is in the Biotechnology: Biological Products (No Diagnostic
Substances) industry, part of the Health Care sector. It first went public
in 2013.