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

The Advisory Board Company (symbol: ABCO) was one of the worst losers of
the trading day today (2015-10-02), losing -5.5%. The number of shares that
changed hands was 548,661, or about 1 times the average daily volume in the
stock.
The closing price was $42.3, amounting to a market cap of $1,800,000,000,
about -29.94% off the highest price in the last 12 months. The stock has
been trading at a range between $37.47 and $60.38.
ABCO is in the Other Consumer Services industry, part of the Consumer
Services sector. It first went public in 2001.