$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 (2016-08-12), losing -5.04%. The number of shares that
changed hands was 1,799,603, or about 1 times the average daily volume in
the stock.
The closing price was $6.78, amounting to a market cap of $590,370,000,
about -27.87% off the highest price in the last 12 months. The stock has
been trading at a range between $2.63 and $9.4.
CENX is in the Aluminum industry, part of the Basic Industries sector. It
first went public in 1996.