The , more commonly called the
Nikkei, the
Nikkei index, or the
Nikkei Stock Average (, , or ), is a
stock market index for the
Tokyo Stock Exchange (TSE). It has been calculated daily by the
Nihon Keizai Shimbun (
Nikkei) newspaper since 1950. It is a
price-weighted index (the unit is
yen), and the components are reviewed once a year. Currently, the Nikkei is the most widely quoted average of Japanese equities, similar to the
Dow Jones Industrial Average. In fact, it was known as the "Nikkei Dow Jones Stock Average" from 1975 to 1985.