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, which tracks the entire market of domestic companies and covers most stocks in the Prime Market and some stocks in the Standard Market. It is calculated and published by the TSE. As of January 2024, there will be 1,716 companies listed on the TSE, since about 400 stocks with low liquidity will be phased out after the TSE reform in 2022.
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.
The TOPIX index is traded as a future on the Osaka Exchange under the ticker symbol JTPX.[1] The CQG contract specifications for the TOPIX Index are listed below.
CQG contract specifications[1]
TOPIX Index (JTPX)
Contract Size:
TOPIX Index times 10,000 JPY
Exchange:
OSE
Sector:
Index
Tick Size:
0.5
Tick Value:
5000 JPY
Big Point Value (BPV):
10000
Denomination:
JPY
Decimal Place:
1
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.
^ ab"Historical TOPIX Intraday Data (JTPX)". PortaraCQG. Retrieved 2022-09-07.
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