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

NRG Yield, Inc. Class C Common (symbol: NYLD) was one of the worst losers
of the trading day today (2015-08-04), losing -15.03%. The number of shares
that changed hands was 4,422,358, or about 3 times the average daily volume
in the stock.
The closing price was $16.0, amounting to a market cap of $1,110,000,000,
about -43.08% off the highest price in the last 12 months. The stock has
been trading at a range between $15.94 and $28.11.
NYLD is in the Electric Utilities: Central industry, part of the Public
Utilities sector. It first went public in 2015.
Looking at its valuation, the stock is now trading at 141.59 times earnings.