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

Ensco plc Class A Ordinary Shar (symbol: ESV) was one of the worst losers
of the trading day today (2016-08-22), losing -5.63%. The number of shares
that changed hands was 8,385,171, or about 1 times the average daily volume
in the stock.
The closing price was $8.22, amounting to a market cap of $2,480,000,000,
about -56.58% off the highest price in the last 12 months. The stock has
been trading at a range between $7.25 and $18.93.
ESV is in the Oil & Gas Production industry, part of the Energy sector.