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

Joy Global Inc. Common Stock (symbol: JOY) was one of the worst losers of
the trading day today (2015-12-01), losing -13.16%. The number of shares
that changed hands was 17,572,121, or about 3 times the average daily
volume in the stock.
The closing price was $13.33, amounting to a market cap of $1,300,000,000,
about -75.4% off the highest price in the last 12 months. The stock has
been trading at a range between $13.0 and $54.19.
JOY is in the Industrial Machinery/Components industry, part of the Energy
sector.
Looking at its valuation, the stock is now trading at 5.37 times earnings.