Many banks and financials institutions have been gamification in the past years. This slide deck compiles a number of examples from different organizations. Through many example screenshots a great overview is given of how engaging banking and finance can be made for employees and customers.
These and many more examples can be found in the book "Gamification in Banking & Financials" by Mario Herger, available on Amazon.
To contact Mario, visit http://www.enterprise-gamification.com/