$OIBR is one of biggest winner #stocks today. read more:

Oi S.A. (symbol: OIBR) was one of the biggest winners of the trading day
today (2015-08-20), gaining 11.7512%. The number of shares that changed
hands was 2,609,889, or about 1.1 times the average daily volume in the
stock.
The closing price was $0.9253, amounting to a market cap of $648,140,000,
about -87.4959% off the highest price in the last 12 months. The stock has
been trading at a range between $0.4 and $7.4.
OIBR is in the Telecommunications Equipment industry, part of the Public
Utilities sector. It first went public in 2014.