With Berkshire Hathaway delivering an average annual return of around 19.8% over almost six decades, Buffett clearly knows what he's doing. Unsurprisingly, he hasn't diversified Berkshire's holdings as much as most investors would.

While many investors poured into the stock market last year, legendary investor Warren Buffett eased on the brakes. Berkshire Hathaway, the investment company Buffett founded and still leads,

You may want to peruse Warren Buffett's portfolio for ideas. After all, Buffett and his investing colleagues Todd Combs and Ted Wechsler at Berkshire Hathaway (NYSE: BRK.A) (NYSE: BRK.B) only seek out competitively advantaged,