$ATI is one of biggest winner #stocks today. read more:

Allegheny Technologies Incorporated (symbol: ATI) was one of the biggest
winners of the trading day today (2015-12-22), gaining 12.02%. The number
of shares that changed hands was 3,082,993, or about 1.3 times the average
daily volume in the stock.
The closing price was $11.93, amounting to a market cap of $1,300,000,000,
about -68.41% off the highest price in the last 12 months. The stock has
been trading at a range between $10.15 and $37.76.
ATI is in the Steel/Iron Ore industry, part of the Basic Industries sector.