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

Precision Drilling Corporation (symbol: PDS) was one of the worst losers of
the trading day today (2015-09-02), losing -5.11%. The number of shares
that changed hands was 3,318,564, or about 1 times the average daily volume
in the stock.
The closing price was $4.46, amounting to a market cap of $1,310,000,000,
about -64.15% off the highest price in the last 12 months. The stock has
been trading at a range between $3.83 and $12.44.
PDS is in the Oil & Gas Production industry, part of the Energy sector.