$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 (2016-09-13), losing -14.19%. The number of shares
that changed hands was 1,026,201, or about 12 times the average daily
volume in the stock.
The closing price was $9.31, amounting to a market cap of $1,140,000,000,
about -94.76% 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.