$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 (2016-08-19), losing -5.72%. The number of shares
that changed hands was 700,271, or about 1 times the average daily volume
in the stock.
The closing price was $5.27, amounting to a market cap of $556,110,000,
about -46.98% off the highest price in the last 12 months. The stock has
been trading at a range between $3.38 and $9.94.
CSTM is in the Metal Fabrications industry, part of the Basic Industries
sector. It first went public in 2013.