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

The Rubicon Project, Inc. Commo (symbol: RUBI) was one of the worst losers
of the trading day today (2015-10-28), losing -12.76%. The number of shares
that changed hands was 2,848,375, or about 7 times the average daily volume
in the stock.
The closing price was $14.42, amounting to a market cap of $632,100,000,
about -29.97% off the highest price in the last 12 months. The stock has
been trading at a range between $10.91 and $20.59.
RUBI is in the Computer Software: Programming, Data Processing industry,
part of the Technology sector. It first went public in 2014.