$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 (2016-06-23), losing -6.45%. The number of shares
that changed hands was 43,642,070, or about 2 times the average daily
volume in the stock.
The closing price was $11.32, amounting to a market cap of $2,310,000,000,
about -68.65% off the highest price in the last 12 months. The stock has
been trading at a range between $3.35 and $36.11.
WLL is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2003.