$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 (2017-01-30), losing -8.01%. The number of shares
that changed hands was 1,989,716, or about 2 times the average daily volume
in the stock.
The closing price was $8.38, amounting to a market cap of $764,680,000,
about -83.8% off the highest price in the last 12 months. The stock has
been trading at a range between $7.58 and $51.72.
HK is in the Oil & Gas Production industry, part of the Energy sector.