Why Buffett is always betting big on bank stocks By: CNBC.com News September 25, 2014 at 09:00 AM EDT Why are financial stocks the cornerstone of Warren Buffett's empire? Buffett's love of bank stocks can be explained in two key investing concepts. Read More >> Related Stocks: American Express Bank of America Bank of New York Mellon Barclays Plc ADR Berkshire Hathaway Citigroup Deutsche Bank Ag Goldman Sachs Group JPMorgan Chase & Co PNC Financial Services U.S. Bancorp Wells Fargo