Nikkei 225 Index is the stock price index of 225 varieties of Tokyo Stock Exchange launched by Nihon Keizai Shimbun. Therefore, this kind of index has a long duration and good comparability, and has become the most commonly used and reliable index to investigate the long-term evolution and latest changes of the Japanese stock market. The Nikkei index quoted by the media daily refers to this index.

The Nikkei 225 index is compiled by 1949, which is composed of the prices of 225 stocks listed in the first group of Tokyo Stock Exchange. This index is calculated and managed by Japan Economic News Corporation (NKS), spread through major international price reporting media, and widely used as a reference to represent the Japanese stock market by various countries.

1In September, 1986, Singapore International Finance Exchange (SIMEX) launched the Nikkei 225 stock index futures, which became a major historical milestone. Since then, the trading of Nikkei 225 stock index futures and options has also become an integral part of the investment strategy of many Japanese securities companies.

The Nikkei 225 Average Stock Index (Nikkei 225) is a stock index representing the Japanese stock market, and the data is published daily by the Nihon Keizai Shimbun. It is the oldest stock index (base period is 1947 =225), and it is the most familiar index for domestic and foreign investors and stock market stakeholders.