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

Coupa Software Incorporated (symbol: COUP) was one of the worst losers of
the trading day today (2016-12-28), losing -5.15%. The number of shares
that changed hands was 143,593, or about 0 times the average daily volume
in the stock.
The closing price was $25.44, amounting to a market cap of $1,270,000,000,
about -38.86% off the highest price in the last 12 months. The stock has
been trading at a range between $24.19 and $41.61.
COUP is in the Advertising industry, part of the Consumer Services sector.
It first went public in 2014.