- Warren Buffett shared important lessons he learned by struggling with a bad business.
- He was speaking at the annual shareholder meeting for his company, Berkshire Hathaway.
- Berkshire is the sixth-largest U.S. company by market value.
David A. Grogan | CNBC
The key to becoming a good investor is to "run a lousy business," Warren Buffett told shareholders at the annual Berkshire Hathaway meeting.