The financial sector of emerging economies in Africa is characterized by a non-competitive banking sector which dominates any direct participation of agents in asset markets. Based on a variant of Diamond and Dybvig’s (1983) model of financial inter-mediation, we formally explain both stylized facts through market inexperienceof agents in emerging economies. While experienced agents correctly predict future mar- ket clearing equilibrium prices, inexperienced agents are ignorant about future market equilibria. As a consequence, a monopolistic banking sector can exploit these agents because their only outside option is an autarkic investment project.