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

Tronox Limited Ordinary Shares (symbol: TROX) was one of the worst losers
of the trading day today (2015-12-07), losing -19.79%. The number of shares
that changed hands was 1,741,400, or about 1 times the average daily volume
in the stock.
The closing price was $4.5, amounting to a market cap of $520,440,000,
about -81.59% off the highest price in the last 12 months. The stock has
been trading at a range between $3.91 and $24.44.
TROX is in the Major Chemicals industry, part of the Basic Industries
sector.