Bolsa de Madrid 9 a.m. to 5:30 p.m.; open outcry from 10a.m. to 11:30 a.m., both Monday through Friday The "Bolsa de Madrid" was officially founded in 1831. In 1993, the Bolsa de Madrid switched to all-electronic trading for fixed-income securities. As required by Spanish law, it is managed and operated by the "Sociedad Rectora de la Bolsa de Valores de Madrid S.A.," a corporation organized under the laws of the Kingdom of Spain. The membership of the Madrid Stock Exchange consists of 41 major financial institutions and 12 established securities dealers. At December 31, 2001, approximately 1477 domestic and foreign companies had
Dioscorea mexicana caudex, bear heart-shaped leaves. "Dioscorea mexicana" ranges from the state of San Luis Potosí in northeastern Mexico south to Panama. It is notable for its production of diosgenin, which is a precursor for the synthesis of hormones such as progesterone. Russell Marker developed the extraction and manufacture of hormones from "D. mexicana" at Syntex. Later the Mexican barbasco trade focused instead on "Dioscorea composita" instead, as this variety has a higher diosgenin content. Dioscorea mexicana Dioscorea mexicana, Mexican yam or cabeza de negro is a species of yam in the genus "Dioscorea". "Dioscorea mexicana" is a caudiciform dioscorea having either