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

bluebird bio, Inc. (symbol: BLUE) was one of the biggest winners of the
trading day today (2016-02-01), gaining 10.61%. The number of shares that
changed hands was 1,693,483, or about 1.0 times the average daily volume in
the stock.
The closing price was $45.75, amounting to a market cap of $1,680,000,000,
about -76.82% off the highest price in the last 12 months. The stock has
been trading at a range between $37.4 and $197.35.
BLUE is in the Biotechnology: Biological Products (No Diagnostic
Substances) industry, part of the Health Care sector. It first went public
in 2013.