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Tokyo Stock Price Index (東証株価指数, Tōshō Kabuka shisū), commonly known as TOPIX, along with the Nikkei 225, is an important stock market index for the Tokyo Stock Exchange (TSE) in Japan, tracking all domestic companies of the exchange's First Section. It is calculated and published by the TSE. As of 1 February 2011, there are 1,669 companies listed on the First Section of the TSE, and the market value for the index was ¥197.4 trillion. [1]


The index transitioned from a system where a company's weighting is based on the total number of shares outstanding to a weighting based on the number of shares available for trading (called the free float). This transition took place in three phases starting in October 2005 and was completed in June 2006. Although the change is a technicality, it had a significant effect on the weighting of many companies in the index, because many companies in Japan hold a significant number of shares of their business partners as a part of intricate business alliances, and such shares are no longer included in calculating the weight of companies in the index.

TSE currently calculates and distributes TOPIX every second and further plans to launch a new High-Speed Index dissemination service provided at the millisecond level starting from February 28, 2011.

History of TOPIX

Statistics (close price)


TOPIX Component

Component [2] Weight
Transportation equipment12%
Electric Appliances12%
Information and Communication7%
Wholesale trade4%
Retail trade4%
Land Transportation4%
Real Estate4%

TOPIX New Index Series

TOPIX 1000Component stocks in the TOPIX 500 and highly market capitalized stocks of the TOPIX smallTOPIX 500Component stocks in the TOPIX Core 30, the TOPIX Large 70 and the TOPIX Mid 400TOPIX 100Component stocks in the TOPIX Core 30 and the TOPIX Large 70TOPIX Core 30The 30 most liquid and highly market capitalized stocks
TOPIX Large 70After the Core 30, the 70 most liquid and highly market capitalized stocks
TOPIX Mid 400Excluding TOPIX 100 stocks, these are the remaining stocks in the TOPIX 500
TOPIX SmallOutside the component stocks in the TOPIX 500 and non-eligible1 stocks in the TOPIX
  1. New companies which have not been listed on the TSE for 6 months or more, out of the companies listed on the 1st section of the TSE

TOPIX 100 companies

See also

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  1. TOPIX facts via Wikinvest
  2. "Archived copy" (PDF). Archived from the original (PDF) on 2015-09-22. Retrieved 2015-09-22.CS1 maint: archived copy as title (link)