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The case looks at an alleged bribery in a $1.3 billion oil deal.
Countries are not required to report storage data.
Low oil prices and government actions created shortages and soaring inflation
Are stocks low because of lower oil prices or vice versa?
Big oil companies have been buffered a bit by higher profits from refining oil into gas.
The price of oil has fallen more than 70 percent since June 2014.
Oil producers like having an overseas market, but the economics are against a large volume of exports.
A look at what's going to happen to the controversial pipeline.
Multinationals are built for the long haul, but low oil prices are making them pull back.
As drilling shuts down, the oil-field service company adapts.
