The Botswana Stock Exchange Domestic Company Index or BSE DCI, and the Botswana Stock Exchange Foreign Company Index or BSE FCI are the principal stock indices of the Botswana Stock Exchange. Each is calculated from the weighted averages of the values of their category of stock. A third index value, the All Company Index, is derived from a weighted average of the two indices. On the Botswana Stock Exchange, a company that is designated as a "foreign company" is a company that is "dual-listed", meaning that it is also listed on another stock exchange.