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

Cogent Communications Holdings, (symbol: CCOI) was one of the worst losers
of the trading day today (2016-06-20), losing -4.41%. The number of shares
that changed hands was 1,059,818, or about 3 times the average daily volume
in the stock.
The closing price was $39.86, amounting to a market cap of $1,770,000,000,
about -4.94% off the highest price in the last 12 months. The stock has
been trading at a range between $25.84 and $41.93.
CCOI is in the Computer Software: Prepackaged Software industry, part of
the Technology sector.
Looking at its valuation, the stock is now trading at 181.18 times earnings.