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

Halcon Resources Corporation Co (symbol: HK) was one of the worst losers of
the trading day today (2016-09-15), losing -4.67%. The number of shares
that changed hands was 474,271, or about 5 times the average daily volume
in the stock.
The closing price was $8.57, amounting to a market cap of $1,050,000,000,
about -95.17% off the highest price in the last 12 months. The stock has
been trading at a range between $6.9 and $177.59.
HK is in the Oil & Gas Production industry, part of the Energy sector.