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

HollyFrontier Corporation Commo (symbol: HFC) was one of the worst losers
of the trading day today (2016-09-14), losing -5.93%. The number of shares
that changed hands was 4,900,036, or about 1 times the average daily volume
in the stock.
The closing price was $24.12, amounting to a market cap of $4,240,000,000,
about -53.88% off the highest price in the last 12 months. The stock has
been trading at a range between $22.07 and $52.3.
HFC is in the Integrated oil Companies industry, part of the Energy sector.