Stocks expected to have increasing option volume: USAR HAS COPA EWZ PBR

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Petrobras - Petroleo Brasileiro S.A. (NYSE: PBR) Delayed: 17.93 --0 (-0%)
Previous Close $17.93    52 Week High $12.56 
Open $17.93    52 Week Low $2.71 
Day High $17.93    P/E N/A 
Day Low $17.93    EPS $0.00 
Volume 25,186