Old-economy outfits top Fortune's annual Global 500 list, thanks to rising oil prices and a slew of mergers that drove record profits. (
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Wal-Mart retakes the lead as the world's biggest company. See which other outfits top our list. (
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Which automaker lost a whopping $12.6 billion last year? And just how far into the red are stalwarts like Goodyear and Tyson Foods? (
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