Bolsa de Madrid Bolsa de Madrid Bolsa de Madrid (; Madrid Stock Exchange) is the largest and most international of Spain's four regional stock exchanges (the others are located in Barcelona, Valencia, and Bilbao) that trade shares and convertible bonds and fixed income securities, and both government and private-sector debt. Bolsa de Madrid is owned by Bolsas y Mercados Españoles. The reorganisation of Spain's financial market under the national umbrella of the Spanish Stock Market includes the "bolsas", the derivatives markets, and fixed-income markets. Trading is linked through the electronic Spanish Stock Market Interconnection System (SIBE), which handles more than 90% of transactions;
Dioscorea mexicana 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 a partly to completely above-ground dome-shaped caudex with a thick, woody outer layer up to 3 feet (90 cm) in diameter and 8–10 inches (20 to 25 cm) in height. The caudex of "D. mexicana" is divided into regular polygonal plates that become protuberant with age, and separated by deep fissures. The vigorous annual vines which may reach 30 feet (9 m) long before dying back in winter, that grow up from the