$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 (2015-09-01), losing -13.6783%. The number of shares
that changed hands was 4,838,892, or about 1 times the average daily volume
in the stock.
The closing price was $0.9927, amounting to a market cap of $585,910,000,
about -83.2314% off the highest price in the last 12 months. The stock has
been trading at a range between $0.74 and $5.92.
HK is in the Oil & Gas Production industry, part of the Energy sector.