The primary purpose of this study is to develop a framework that will explain the behavior of financial intermediaries and, more precisely, their pricing policies. As financial intermediation is the business of financial assets and liabilities, use is made of concepts and models developed tradition ally in Finance and Economics to end up with recommendations not only for optimal choices of interest rates but also for proper regulation and more sensible accounting methods. Also, the econometric implications of deposit rates stickiness are examined and empirically tested on Belgian data. My...