With as impressive of an investing track record as Warren Buffett has achieved, you'd expect his Berkshire Hathaway portfolio would be loaded with great stocks. And you'd be right. The good news is that you don't need a huge amount of cash to buy many of those stocks.

Warren Buffett and his team at Berkshire Hathaway (NYSE: BRK.A)(NYSE: BRK.B) have long dabbled in bank stocks, owning almost every major Wall Street bank at one time or another over the past several decades.