$SEMG is one of biggest winner #stocks today. read more:

Semgroup Corporation (symbol: SEMG) was one of the biggest winners of the
trading day today (2016-01-21), gaining 20.59%. The number of shares that
changed hands was 1,908,320, or about 2.6 times the average daily volume in
the stock.
The closing price was $18.68, amounting to a market cap of $820,650,000,
about -78.53% off the highest price in the last 12 months. The stock has
been trading at a range between $15.14 and $86.99.
SEMG is in the Oilfield Services/Equipment industry, part of the Energy
sector.
Looking at its valuation, the stock is now trading at 21.7 times earnings.