$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 (2016-12-16), losing -8.01%. The number of shares that
changed hands was 1,958,722, or about 2 times the average daily volume in
the stock.
The closing price was $12.4, amounting to a market cap of $1,550,000,000,
about -15.59% 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.