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

Rowan Companies plc Class A Ord (symbol: RDC) was one of the worst losers
of the trading day today (2016-08-19), losing -5.74%. The number of shares
that changed hands was 3,929,736, or about 1 times the average daily volume
in the stock.
The closing price was $13.62, amounting to a market cap of $1,710,000,000,
about -37.61% off the highest price in the last 12 months. The stock has
been trading at a range between $10.67 and $21.83.
RDC is in the Oil & Gas Production industry, part of the Energy sector.
Looking at its valuation, the stock is now trading at 7.61 times earnings.