$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 (2016-05-04), losing -23.62%. The number of shares
that changed hands was 5,519,043, or about 10 times the average daily
volume in the stock.
The closing price was $15.04, amounting to a market cap of $700,850,000,
about -26.17% off the highest price in the last 12 months. The stock has
been trading at a range between $11.72 and $20.37.
RUBI is in the Computer Software: Programming, Data Processing industry,
part of the Technology sector. It first went public in 2014.
Looking at its valuation, the stock is now trading at 1504.0 times earnings.