Berkshire Hathaway's sixth-largest holding. Don't get me wrong: Occidental Petroleum appears to be a well-run company.

UPS stock tumbled on Thursday as investors digested a weaker-than-expected sales forecast as the company scales back its business with Amazon. Yahoo Finance will chronicle the latest news and ...

Today shares of Occidental Petroleum have fallen -4.6%, vindicating the analysts who have given the stock an average rating ...