The Nikkei is short for Japan’s Nikkei 225 Stock Average, the leading and most-respected index of Japanese stocks. It is a price-weighted index composed of Japan’s top 225 blue-chip companies traded on the Tokyo Stock Exchange. The Nikkei is equivalent to the Dow Jones Industrial Average (DJIA) Index in the United States. The Nikkei is a price-weighted index, which means the index is an average of the share prices of all the companies listed.