Market access and transparency: the Genoa and Milan stock exchanges from Italian Unification to World War I

This article focuses on the conflicts over market access rules on the two primary Italian stock exchanges, Milan and Genoa. These conflicts disrupted the quality of information produced by the two markets. Official brokers aimed to defend their monopoly on brokerage and capture rents by limiting market access. Banks wanted wider access so as to avoid paying these rents, create an opaque market and maximize the benefit from their informational advantage. At the turn of the twentieth century, the Milan Exchange implemented a transparent market organization while the Genoa Exchange remained opaque, creating a complementarity between them which fostered the development of the securities market overall. When in 1907 a violent crisis erupted in the dominant Genoa Exchange, legislation was adopted to harmonize the organization of the Italian exchanges.