Bernstein downgrades BHP shares on lack of upside potential

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AMERICAN AIRLINES (NASDAQ: AAL) Delayed: 14.83 -0.23 (1.53%)
Previous Close $15.06    52 Week High $46.49 
Open $15.01    52 Week Low $24.85 
Day High $15.16    P/E N/A 
Day Low $14.79    EPS $-17.04 
Volume 46,364,769       

BHP BILLITON LIMITED (NYSE: BHP) Delayed: 86.78 -0.45 (0.52%)
Previous Close $87.23    52 Week High $39.12 
Open $87.40    52 Week Low $18.46 
Day High $87.79    P/E N/A 
Day Low $86.48    EPS $0.00 
Volume 2,410,461       

RIO TINTO PLC (NYSE: RIO) Delayed: 95.68 -0.41 (0.43%)
Previous Close $96.09    52 Week High $40.19 
Open $95.74    52 Week Low $21.89 
Day High $96.72    P/E N/A 
Day Low $95.39    EPS $0.00 
Volume 2,199,953       

VALE S.A. (NYSE: VALE) Delayed: 13.63 -0.17 (1.23%)
Previous Close $13.80    52 Week High $8.10 
Open $13.66    52 Week Low $2.13 
Day High $13.74    P/E N/A 
Day Low $13.56    EPS $0.00 
Volume 20,782,382