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

United States Steel Corporation (symbol: X) was one of the biggest winners
of the trading day today (2016-03-02), gaining 23.5%. The number of shares
that changed hands was 36,454,261, or about 3.5 times the average daily
volume in the stock.
The closing price was $11.35, amounting to a market cap of $1,660,000,000,
about -59.0% off the highest price in the last 12 months. The stock has
been trading at a range between $6.15 and $27.68.
X is in the Steel/Iron Ore industry, part of the Basic Industries sector.