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

SunPower Corporation (symbol: SPWR) was one of the worst losers of the
trading day today (2016-09-14), losing -13.87%. The number of shares that
changed hands was 10,084,067, or about 4 times the average daily volume in
the stock.
The closing price was $7.64, amounting to a market cap of $1,060,000,000,
about -75.43% off the highest price in the last 12 months. The stock has
been trading at a range between $7.61 and $31.1.
SPWR is in the Semiconductors industry, part of the Technology sector. It
first went public in 2005.