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

Arcelor Mittal NY Registry Shar (symbol: MT) was one of the worst losers of
the trading day today (2015-12-02), losing -9.61%. The number of shares
that changed hands was 16,864,589, or about 2 times the average daily
volume in the stock.
The closing price was $4.42, amounting to a market cap of $7,940,000,000,
about -64.21% off the highest price in the last 12 months. The stock has
been trading at a range between $4.39 and $12.35.
MT is in the Steel/Iron Ore industry, part of the Basic Industries sector.