The Spanish Stock Market Interconnection System (SIBE) is the electronic platform for trading equities for the four Spanish stock exchanges. In addition to the four stock exchanges, this system is also used in other markets in the Spanish Stock Markets group (Bolsas y Mercados Españoles), such as Latibex, AIAF and MAB.

It is managed by the Sociedad de Bolsas, a subsidiary of BME. This electronic system has also been implemented in the Venezuela and El Salvador stock exchanges.