$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 (2015-08-25), losing -10.24%. The number of shares that
changed hands was 3,704,736, or about 2 times the average daily volume in
the stock.
The closing price was $20.16, amounting to a market cap of $2,510,000,000,
about -52.74% off the highest price in the last 12 months. The stock has
been trading at a range between $20.04 and $42.66.
TERP is in the Electric Utilities: Central industry, part of the Public
Utilities sector. It first went public in 2014.