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

MPLX LP Common Units Representi (symbol: MPLX) was one of the worst losers
of the trading day today (2015-07-13), losing -14.51%. The number of shares
that changed hands was 4,254,319, or about 42 times the average daily
volume in the stock.
The closing price was $59.03, amounting to a market cap of $4,740,000,000,
about -31.02% off the highest price in the last 12 months. The stock has
been trading at a range between $46.08 and $85.57.
MPLX is in the Natural Gas Distribution industry, part of the Energy
sector. It first went public in 2012.
Looking at its valuation, the stock is now trading at 36.69 times earnings.