Almost unchanged since the beginning of his career, his investment principles make Warren Buffet a “good father”. He focuses primarily on undervalued companies - listed or not - profitable, and whose know-how "niche" make it leaders in their respective markets. No matter their lines of business: Warren Buffet is a financial not an industrial.
The success has never reduced: the value of the assets of Berkshire Hathaway progressed by an average of 21.1% per year between 1965 and 2007, twice more than the U.S. stock market index S & P 500 over the same period.
Today, the action Berkshire Hathaway class 'A' is the most expensive of the New York Stock Exchange market: never divided, it was trading at around $ 123,000 at October 21, limiting its drop at 13 % since the beginning of the year, little compared with the 33 % of S & P 500. The Berkshire’s portfolio currently counts less than forty shares, mostly American.