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

Groupon, Inc. (symbol: GRPN) was one of the worst losers of the trading day
today (2016-10-27), losing -22.05%. The number of shares that changed hands
was 43,450,440, or about 5 times the average daily volume in the stock.
The closing price was $4.1, amounting to a market cap of $2,360,000,000,
about -30.98% off the highest price in the last 12 months. The stock has
been trading at a range between $2.15 and $5.94.
GRPN is in the Advertising industry, part of the Technology sector. It
first went public in 2011.