The aim of this paper is to explain why an efficient privatization policy should transit through stock markets. Indeed, in theory, this method can be considered as the best for several reasons: more justice, more equity, more transparency. Also, this modality has showed its ability to imply the majority of socioeconomic groups around, one of the less popular policies especially in the less developed countries. The analyses of the Tunisian case showed that restructuring of public companies (through the stock market) had created a dynamic in the financial market size, improved market performance, and an increase in the number of savers-investors. [ABSTRACT FROM AUTHOR]