11.   But he declined to say whether the United States would change its policy and bar American oil companies from buying Iranian oil.

12.   But U.S. oil companies can buy Iranian oil and sell it outside the United States.

13.   Companies that depend on imports, such as electric utilities, which buy imported oil in now more valuable dollars, will have to deal with rising costs.

14.   Exxon buys oil because it refines more than twice as much as it pumps from its fields.

15.   For example, if Coda wanted to buy oil and gas properties, it might contact a group of investors about putting money into the deal.

16.   He said Clinton could dampen price speculation in a variety of ways, by buying heating oil and storing it or even buying heating oil futures contracts.

17.   Holding out would reduce inventories further as oil is bought in anticipation of higher prices.

18.   In addition to buying oil, companies will be allowed to sell parts, equipment, and maintenance services for the pipeline carrying the oil out of Iraq.

19.   In addition to buying oil, companies will be allowed to sell parts, equipment and maintenance services for the pipeline carrying the oil out of Iraq.

20.   In this case, traders bought sold gasoline and bought heating oil, betting that the latter would perform better than the former and that the spread would widen.