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

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Petrobras - Petroleo Brasileiro S.A. (NYSE: PBR) Delayed: 18.52 +0.16 (0.87%)
Previous Close $18.36    52 Week High $12.56 
Open $18.66    52 Week Low $2.71 
Day High $18.67    P/E N/A 
Day Low $18.46    EPS $0.00 
Volume 13,151,455