The mystery over Warren Buffett’s surprisingly defensive stance deepened over the weekend. The 94-year-old CEO of Berkshire Hathaway sold more stocks in the latest quarter and grew a record cash pile even larger to $334 billion,

The Oracle of Omaha has $180 billion collectively invested in four brand-name companies with well-defined competitive advantages and phenomenal capital-return programs.

OMAHA, Neb. (AP) — In his annual letter to shareholders Saturday, Warren Buffett celebrated the successes of Berkshire Hathaway's companies last year and in the 60 years since he took over a struggling New England textile company and began converting it into a massive conglomerate.