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

Superior Energy Services, Inc. (symbol: SPN) was one of the worst losers of
the trading day today (2015-09-04), losing -6.83%. The number of shares
that changed hands was 4,196,726, or about 1 times the average daily volume
in the stock.
The closing price was $14.33, amounting to a market cap of $2,160,000,000,
about -59.39% off the highest price in the last 12 months. The stock has
been trading at a range between $12.59 and $35.29.
SPN is in the Oilfield Services/Equipment industry, part of the Energy
sector.