$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 (2017-01-11), losing -7.89%. The number of shares that
changed hands was 1,004,164, or about 1 times the average daily volume in
the stock.
The closing price was $12.38, amounting to a market cap of $1,540,000,000,
about -15.72% off the highest price in the last 12 months. The stock has
been trading at a range between $7.23 and $14.69.
TERP is in the Electric Utilities: Central industry, part of the Public
Utilities sector. It first went public in 2014.