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

Seadrill Limited (symbol: SDRL) was one of the biggest winners of the
trading day today (2016-03-04), gaining 121.11%. The number of shares that
changed hands was 148,666,420, or about 15.6 times the average daily volume
in the stock.
The closing price was $5.97, amounting to a market cap of $2,940,000,000,
about -61.33% off the highest price in the last 12 months. The stock has
been trading at a range between $1.57 and $15.44.
SDRL is in the Oil & Gas Production industry, part of the Energy sector.