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

Oasis Petroleum Inc. Common Sto (symbol: OAS) was one of the worst losers
of the trading day today (2016-10-31), losing -8.62%. The number of shares
that changed hands was 20,688,393, or about 2 times the average daily
volume in the stock.
The closing price was $10.49, amounting to a market cap of $1,890,000,000,
about -23.54% off the highest price in the last 12 months. The stock has
been trading at a range between $3.4 and $13.72.
OAS is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2010.