According to the Mortgage Bankers Association, mortgage rates are climbing higher

In 2012, the country's largest mortgage originators saw a huge surge in refinancing activity and, thus, fat mortgage banking profits. However, if rates continue to rise, fewer consumers will be eager to refinance their loans, and revenues at the banks may slip considerably.

In this video, Motley Fool banking analysts David Hanson and Matt Koppenheffer discuss how the nation's largest banks would adjust to a sharp decline in mortgage banking revenue and tell investors which bank wouldn't be hit quite as hard.