As Warren Buffett prepares to hand Berkshire Hathaway's future to the next generation of leaders, his core investing rules are under sharper scrutiny than ever. I look at five principles that recent ...

The stock-picking Oracle of Omaha. An avuncular, Dairy-Queen-eating, Coke-drinking product pitchman. A living symbol of capitalism and its complexities.

OMAHA, Neb. — Raven Connelly flew from London. Katherine Schaaf took Amtrak from San Francisco. And Bill and Carol Thatcher drove several hours from Fort Dodge, Iowa — population 26,000. They were ...