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

Hercules Offshore, Inc. (symbol: HERO) was one of the worst losers of the
trading day today (2015-11-20), losing -12.15%. The number of shares that
changed hands was 66,468, or about 1 times the average daily volume in the
stock.
The closing price was $4.05, amounting to a market cap of $654,650,000,
about -72.07% off the highest price in the last 12 months. The stock has
been trading at a range between $4.01 and $14.5.
HERO is in the Oil & Gas Production industry, part of the Energy sector. It
first went public in 2005.