$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 (2016-12-09), gaining 12.06%. The number of shares that
changed hands was 41,237,257, or about 4.1 times the average daily volume
in the stock.
The closing price was $3.81, amounting to a market cap of $1,920,000,000,
about -49.13% 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.