Just how far into the red are stalwarts like Goodyear and Tyson Foods? Bigger isn't always better -- 17 of Fortune's Global 500 are actually in the red.
, Fortune reporter
Old-economy outfits top Fortune's annual Global 500 list, thanks to rising oil prices and a slew of mergers that drove record profits. (
The top 25
Wal-Mart retakes the lead as the world's biggest company. See which other outfits top our list. (
Exxon Mobil leads our list of top earners this year. Which other companies are among the most profitable on the planet? (