Fortune 500: Stock watch

Stocks generally are getting socked this year, but investors are loving these 12 big companies, among them discount retailers and a food producer. Read on to see who's up the most on the Fortune 500, who's down the most and why the list is shrinking fast.

2008 Fortune 500Wal-Mart is on top for the second year in a row, while AT&T moves up and GM slips. See who ranks where on the definitive list of America's largest companies and why. More
What investors should do nowWith Wall Street imploding and stocks hitting bear territory, this volatile market is more confusing than ever. Here's how to navigate through the chaos. More
Stocks to buy nowOppenheimer analyst Meredith Whitney doesn't have a lot of good things to say about the financial sector - but she sees a bargain in the preferred shares of these three banks. More
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