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

Gulfport Energy Corporation (symbol: GPOR) was one of the worst losers of
the trading day today (2016-12-15), losing -14.4%. The number of shares
that changed hands was 16,028,984, or about 6 times the average daily
volume in the stock.
The closing price was $23.01, amounting to a market cap of $2,890,000,000,
about -33.63% off the highest price in the last 12 months. The stock has
been trading at a range between $20.8 and $34.67.
GPOR is in the Oil & Gas Production industry, part of the Energy sector.