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

Sunoco LP Common Units represen (symbol: SUN) was one of the worst losers
of the trading day today (2016-12-20), losing -8.02%. The number of shares
that changed hands was 2,796,067, or about 3 times the average daily volume
in the stock.
The closing price was $22.14, amounting to a market cap of $2,480,000,000,
about -44.73% off the highest price in the last 12 months. The stock has
been trading at a range between $21.01 and $40.06.
SUN is in the Oil Refining/Marketing industry, part of the Energy sector.
It first went public in 2012.
Looking at its valuation, the stock is now trading at 15.48 times earnings.