BHP Billiton Ltd. (BHP) 30-day option implied volatility at 41

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BHP BILLITON LIMITED (NYSE: BHP) Delayed: 92.29 +3.20 (3.59%)
Previous Close $89.09    52 Week High $39.12 
Open $92.67    52 Week Low $18.46 
Day High $93.83    P/E N/A 
Day Low $91.37    EPS $0.00 
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