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

TerraForm Power, Inc. (symbol: TERP) was one of the worst losers of the
trading day today (2015-11-19), losing -16.35%. The number of shares that
changed hands was 10,563,240, or about 4 times the average daily volume in
the stock.
The closing price was $8.39, amounting to a market cap of $1,050,000,000,
about -80.33% off the highest price in the last 12 months. The stock has
been trading at a range between $8.01 and $42.66.
TERP is in the Electric Utilities: Central industry, part of the Public
Utilities sector. It first went public in 2014.