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

Constellium N.V. (symbol: CSTM) was one of the biggest winners of the
trading day today (2016-02-17), gaining 21.34%. The number of shares that
changed hands was 3,805,746, or about 3.4 times the average daily volume in
the stock.
The closing price was $4.89, amounting to a market cap of $511,740,000,
about -76.5% off the highest price in the last 12 months. The stock has
been trading at a range between $3.38 and $20.81.
CSTM is in the Metal Fabrications industry, part of the Basic Industries
sector. It first went public in 2013.