Many investors looking to invest in the big banks are intimidated by the vast number of business segments they need to understand to get a clear picture of how the bank is truly performing. In the following video, Motley Fool financial analysts David Hanson and Matt Koppenheffer break down one key segment of Bank of America's (NYSE:BAC) business that is vital for investors to understand.

David Hanson has no position in any stocks mentioned. Matt Koppenheffer owns shares of Bank of America. The Motley Fool owns shares of Bank of America. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.