Risk Factors for Big Oil and Gas

CNBC analyses the risk factors for big oil and gas companies.

The market news is quoted as saying:

Big oil was recently under fire again after Exxon [XOM 81.54 0.87 (+1.08%) ], Chevron [CVX 102.54 1.17 (+1.15%) ] and BP [BP 44.38 0.35 (+0.79%) ] made billions in profits from the the spike.

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