RBI has revealed that Indian companies raised 1.93 billion US Dollars from overseas markets in October through external commercial borrowings and foreign currency convertible bonds. In a statement issued from Mumbai on Monday, RBI has said that as many as 52 Indian companies raised money from external sources in October. It adds that companies raised 719.52 million US Dollars through automatic route for which no approval is required from the RBI or the government.Twelve firms raised a total of 1.21 billion US Dollars through approval route.