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

Petroleo Brasileiro S.A.- Petro (symbol: PBR) was one of the worst losers
of the trading day today (2015-11-25), losing -8.08%. The number of shares
that changed hands was 24,299,453, or about 1 times the average daily
volume in the stock.
The closing price was $5.12, amounting to a market cap of $33,390,000,000,
about -53.03% off the highest price in the last 12 months. The stock has
been trading at a range between $3.72 and $10.9.
PBR is in the Oil & Gas Production industry, part of the Energy sector.