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

Callon Petroleum Company Common (symbol: CPE) was one of the worst losers
of the trading day today (2015-09-09), losing -9.33%. The number of shares
that changed hands was 2,263,531, or about 1 times the average daily volume
in the stock.
The closing price was $8.16, amounting to a market cap of $540,840,000,
about -15.09% off the highest price in the last 12 months. The stock has
been trading at a range between $4.09 and $9.61.
CPE is in the Oil & Gas Production industry, part of the Energy sector.
Looking at its valuation, the stock is now trading at 55.89 times earnings.