A looming supply glut is weighing on giants from Exxon to Shell
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Behind the scenes at The Economist
Exxon and Chevron have benefited less than their European rivals
As stocks dwindle, further price rises are inevitable
Alternatives to Gulf supplies are scare
The great commodity-market mystery is deepening
Although many of their investments have a commercial logic, the result looks increasingly unwieldy
Post-war reconstruction and efforts to diversify production will present big opportunities
