$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 (2015-07-15), losing -7.88%. The number of shares
that changed hands was 1,682,945, or about 11 times the average daily
volume in the stock.
The closing price was $40.1, amounting to a market cap of $1,440,000,000,
about -33.16% off the highest price in the last 12 months. The stock has
been trading at a range between $40.0 and $59.99.
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 17.91 times earnings.