$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 (2016-01-18), losing -16.12%. The number of shares
that changed hands was 21,045,064, or about 2 times the average daily
volume in the stock.
The closing price was $4.84, amounting to a market cap of $673,330,000,
about -75.34% off the highest price in the last 12 months. The stock has
been trading at a range between $4.61 and $19.63.
OAS is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2010.
Looking at its valuation, the stock is now trading at 4.44 times earnings.