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

Century Aluminum Company (symbol: CENX) was one of the worst losers of the
trading day today (2016-07-19), losing -8.08%. The number of shares that
changed hands was 2,231,529, or about 1 times the average daily volume in
the stock.
The closing price was $7.39, amounting to a market cap of $643,370,000,
about -26.32% off the highest price in the last 12 months. The stock has
been trading at a range between $2.63 and $10.03.
CENX is in the Aluminum industry, part of the Basic Industries sector. It
first went public in 1996.