“This study aims at using simple descriptive indices to assess the impact of policies of financial regulation and deregulation on the financial system over time,and in particular on savings mobilization. In the second section of this paper we discuss the changes that the Nigerian banking system has experienced since its inception with a view to placing the different financial policies of the government in proper focus. A review of macro policies and environment with a view to highlighting their conditioning influence on policies of financial regulation and deregulation is given in Section III. Section IV reviews regulatory practices in the Nigerian banking system and classifies the different banking regulation periods in Nigeria using credit-control practices as criteria, while Section V evaluates the performance of the Nigerian banking system vis a vis the regulatory periods identified in Section IV and the overview presented in Section III. Section VI presents the conclusion and recommendations.”