Investors are awaiting Berkshire Hathaway Chairman Warren Buffett’s annual investor letter, in which he typically expounds on Berkshire’s performance along with anecdotes and vignettes about investing and life.

Not only are investors looking to dig into Berkshire's financials, they are also keenly awaiting Buffett's annual letter to shareholders that may offer commentary on investments and the economy.

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