Bernstein downgrades BHP shares on lack of upside potential

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AMERICAN AIRLINES (NASDAQ: AAL) Delayed: 12.85 -0.09 (0.7%)
Previous Close $12.94    52 Week High $46.49 
Open $12.66    52 Week Low $24.85 
Day High $13.06    P/E N/A 
Day Low $12.61    EPS $-17.04 
Volume 62,157,455       

BHP BILLITON LIMITED (NYSE: BHP) Delayed: 87.35 -4.9 (5.31%)
Previous Close $92.25    52 Week High $39.12 
Open $87.78    52 Week Low $18.46 
Day High $88.26    P/E N/A 
Day Low $86.59    EPS $0.00 
Volume 3,675,708       

RIO TINTO PLC (NYSE: RIO) Delayed: 99.39 -4.35 (4.19%)
Previous Close $103.74    52 Week High $40.19 
Open $99.83    52 Week Low $21.89 
Day High $99.99    P/E N/A 
Day Low $98.90    EPS $0.00 
Volume 2,595,602       

VALE S.A. (NYSE: VALE) Delayed: 15.28 -0.16 (1.04%)
Previous Close $15.44    52 Week High $8.10 
Open $15.03    52 Week Low $2.13 
Day High $15.40    P/E N/A 
Day Low $14.96    EPS $0.00 
Volume 38,434,984