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

Whiting Petroleum Corporation C (symbol: WLL) was one of the worst losers
of the trading day today (2015-12-25), losing -5.35%. The number of shares
that changed hands was 7,786,930, or about 1 times the average daily volume
in the stock.
The closing price was $10.08, amounting to a market cap of $2,060,000,000,
about -75.75% off the highest price in the last 12 months. The stock has
been trading at a range between $8.12 and $41.57.
WLL is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2003.