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

Atento S.A. Ordinary Shares (symbol: ATTO) was one of the worst losers of
the trading day today (2016-06-28), losing -4.08%. The number of shares
that changed hands was 39,886, or about 1 times the average daily volume in
the stock.
The closing price was $8.46, amounting to a market cap of $623,930,000,
about -42.21% off the highest price in the last 12 months. The stock has
been trading at a range between $6.77 and $14.64.
ATTO is in the Telecommunications Equipment industry, part of the Public
Utilities sector. It first went public in 2014.
Looking at its valuation, the stock is now trading at 26.44 times earnings.