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

Denbury Resources Inc. Common S (symbol: DNR) was one of the worst losers
of the trading day today (2015-12-28), losing -11.74%. The number of shares
that changed hands was 10,562,707, or about 1 times the average daily
volume in the stock.
The closing price was $2.03, amounting to a market cap of $710,610,000,
about -78.7% off the highest price in the last 12 months. The stock has
been trading at a range between $1.72 and $9.53.
DNR is in the Oil & Gas Production industry, part of the Energy sector.