Berkshire Hathaway this week announced its new CEO Todd Combs, who will take over Warren Buffett.

Warren Buffett has an excellent investment record that he did for the Company while working as the CEO of Berkshire Hathaway for nearly 40 years, but he's not perfect.

Mr. Buffett did many equity purchases for Berkshire within few years. But acquisitions like U. S. Bancorp, ConocoPhillips, Kraft Foods, Wells Fargo, and Sanofi-Aventis are now well below the Company’s cost.

For example, U. S. Bancorp trades nearly $24, which is under Berkshire's cost of $31. The U. S. listed Sanofi's shares is $33, while Berkshire paid around $40.

There are many winners like Coca-Cola, Procter and Gamble, and American Express in Berkshire's famous $55 billion equity collection.

There are two types of shares that Berkshire offer. One is the very expensive A shares called BRKA costing about $120,000 each and second one is less expensive B shares called BRKB costing about $80.

The newly appointed CEO will look after the small part of the investments of Berkshire initially. Mr. Combs has expressed his desire to work in financial stocks, which includes Mastercard, U. S. Bancorp, and State Street.

Many experts believe that the U. S. blue-chip stocks will become the best investments in the world in the coming 10 years.