$NRG is one of biggest winner #stocks today. read more:

NRG Energy, Inc. (symbol: NRG) was one of the biggest winners of the
trading day today (2015-12-07), gaining 6.11%. The number of shares that
changed hands was 14,526,769, or about 1.7 times the average daily volume
in the stock.
The closing price was $9.55, amounting to a market cap of $3,000,000,000,
about -66.36% off the highest price in the last 12 months. The stock has
been trading at a range between $8.8 and $28.39.
NRG is in the Electric Utilities: Central industry, part of the Public
Utilities sector.