$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 (2016-12-01), gaining 10.39%. The number of shares that
changed hands was 39,133,198, or about 4.6 times the average daily volume
in the stock.
The closing price was $3.08, amounting to a market cap of $1,550,000,000,
about -58.88% off the highest price in the last 12 months. The stock has
been trading at a range between $1.57 and $7.49.
SDRL is in the Oil & Gas Production industry, part of the Energy sector.