The international ninth business forum on trade exchange among the Muslim countries entitled "opportunities and challenges" will be inaugurated here today. A number of businessmen, industrialists and investors in the Muslim world will participate in the forum. Mohammed Al-Sharif, the Secretary General of Jeddah Chamber of Commerce and Industry, said about 1000 exporters, importers and investors from 18 countries including 14 Arab and Muslim countries will participate in the two-day forum.