Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) Chairman and CEO Warren Buffett and his team own about 47 stocks in the holding company's portfolio, along with one exchange-traded fund (ETF). Out of the vast universe of investable stocks, it's these 48 that managed to catch the eye of one of the world's greatest investors. That's saying something. 

Bank of America (NYSE: BAC) is not only one of those 48 holdings; it is the second-largest position in its entire portfolio. Buffett's Berkshire owns more than 1 billion shares of Bank of America, the nation's second-largest bank, for a total market value of about $29.5 billion. Those shares account for 9.1% of the Berkshire Hathaway portfolio, and only Apple accounts for a bigger share of the portfolio.

That indication of high interest in the stock should get the attention of investors. When you consider that Bank of America is trading near its lowest valuation in years, the flashing "buy" sign glows even brighter.

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Source Fool.com