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Nikkei Indices Chronology
September 7, 1950: Tokyo Stock Exchange starts calculating a stock price average by the ex-right adjustment method based on the Dow Jones model. The index is calculated retroactive to May 16, 1949.
November 12, 1968: TSE Chairman Morinaga announces the discontinuation of the TSE Adjusted Stock Price Average and the introduction of a new stock market index.
July 1, 1969: TSE starts announcing the market value-weighted Tokyo Stock Index. TSE continues to calculate and announce the Adjusted Stock Price Average for just one year thereafter, limiting it to only daily closing prices.
July 1, 1970: Upon discontinuation of TSE Adjusted Stock Price, Nihon Keizai Shimbun, Inc., (Nikkei) commissions calculations for a stock index.
July 1, 1971: A Nikkei subsidiary, Nihon Short-wave Broadcasting Co., Ltd., starts calculating and announcing the Adjusted Stock Price as NSB 225 Adjusted Average.
May 1, 1975: U.S.-based Dow Jones & Co. grants Nikkei exclusive rights to use of the name and the Dow calculation method for the Nikkei Dow-Jones Stock Price Average.
January 4, 1982: Nikkei starts calculating and announcing the Nikkei Dow-Jones 500 Stock Average, which covers an adjusted average for the selected stocks as of January 4, 1972.
April 1, 1985: Nikkei starts calculating and announcing the Nikkei Over-the-Counter Stock Average.
May 1, 1985: In a name change agreed to by Nikkei and Dow Jones, the Nikkei Dow-Jones Stock Price Average becomes the Nikkei Stock Average. At the same time, the Nikkei Dow-Jones 500 Stock Average becomes the Nikkei 500 Stock Average. |
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