Bolsa de Madrid
Once in Madrid, Salamanca developed a great inclination toward business, which would bring him both great successes and great difficulties. After serving briefly as a judge in a Madrid court of first instance, in 1839 he obtained the official monopoly on salt, and began also to invest in the Bolsa de Madrid (Madrid Stock Exchange). He became a prominent figure in the highest circles of Madrid society. Among his associates over the next few years were Nazario Carriquiri, Alejandro Aguado, Gaspar Remisa, José Buschenthal, Agustín Muñoz and the Rothschilds' agents in Madrid, Daniel Weisweiller and Ignacio Bauer. His possession of the salt monopoly, however, gained him the enmity, for the time, of General Ramón María Narváez.