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

Dynegy Inc. Common Stock (symbol: DYN) was one of the worst losers of the
trading day today (2015-12-04), losing -17.88%. The number of shares that
changed hands was 9,969,504, or about 3 times the average daily volume in
the stock.
The closing price was $11.44, amounting to a market cap of $1,380,000,000,
about -67.02% off the highest price in the last 12 months. The stock has
been trading at a range between $11.33 and $34.69.
DYN is in the Electric Utilities: Central industry, part of the Public
Utilities sector.
Looking at its valuation, the stock is now trading at 24.14 times earnings.