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

Constellium N.V. Ordinary Share (symbol: CSTM) was one of the worst losers
of the trading day today (2015-08-26), losing -7.49%. The number of shares
that changed hands was 985,599, or about 1 times the average daily volume
in the stock.
The closing price was $5.93, amounting to a market cap of $623,320,000,
about -80.18% off the highest price in the last 12 months. The stock has
been trading at a range between $5.4 and $29.92.
CSTM is in the Metal Fabrications industry, part of the Basic Industries
sector. It first went public in 2013.