Petrobras ADRs plummet with change of CEO; Jefferies downgrades stock

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Petrobras - Petroleo Brasileiro S.A. (NYSE: PBR) Delayed: 20.86 --0 (-0%)
Previous Close $20.86    52 Week High $12.56 
Open $20.86    52 Week Low $2.71 
Day High $20.86    P/E N/A 
Day Low $20.86    EPS $0.00 
Volume 31,837