This paper presents the course taken by the Cuban economy from the early twentieth century until the outbreak of the Revolution, seen from the perspective of what happened in the stock market. I have therefore prepared an index of Havana Stock Exchange listings which shows strong dependence on what happened in the sugar market, particularly in sugar exports. However, my research highlights the weakness of this institution, conceived more as an instrument of speculative enrichment rather than one of financing, the evolution of which reveals the fragility of the Cuban economy and particularly the poor development of its capital markets.