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

Whiting Petroleum Corporation (symbol: WLL) was one of the biggest winners
of the trading day today (2016-04-22), gaining 10.55%. The number of shares
that changed hands was 35,500,920, or about 1.2 times the average daily
volume in the stock.
The closing price was $11.21, amounting to a market cap of $2,290,000,000,
about -71.37% off the highest price in the last 12 months. The stock has
been trading at a range between $3.35 and $39.15.
WLL is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2003.