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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, 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.

History

1969-07-01　TSE to begin calculating and publishing “TOPIX” and “TOPIX Sector Indices”
1969-08-18　TSE to begin calculating and publishing “Tokyo Stock Exchange Second Section Stock Price Index”
1988-09-03　TOPIX Future Trades begin at TSE
1989-10-20　TOPIX Option Trades begin at TSE
1998-08-02　TSE to begin calculating and publishing “TOPIX New Index Series”
1999-02-01　TSE to begin calculating and publishing “TOPIX Total Return Index”
2001-07-13　TOPIX ETF Trades begin TSE
2003-08-01　TSE to begin calculating and publishing “Tokyo Stock Exchange REIT Index”
2003-09-16　TSE to begin calculating and publishing “Tokyo Stock Exchange Mothers Index”
2005-10-31 Introduction of Free Float Adjusted Indices (Shift in three phases)
2005-11-17 Lyxor AM (Lyxor Asset Management) introduces Lyxor ETF Japan (TOPIX) for trading on Euronext Paris
2006-04-05 Lyxor (Societe Generale) lists on Borsa Italiana the world's most cost-effective and diversified Japan-based UCITS III compliant ETF with TOPIX as the underlying index
2006-04-25 Development of New Custom Index that incorporates Corporate Social Responsibility (CSR)
2006-06-30　Free Float adjustment for TOPIX completed
2006-08-09 TOPIX for the first time available as ETFs in Germany – Start of trading in Deutsche Borse's XTFsegment – Lyxor AM continues to expand investment universe
2007-08-21 Lyxor AM, SGX and TSE introduce first Japan ETF in Singapore based on TOPIX
2007-09-25 London Stock Exchange, Tokyo Stock Exchange, Inc. and Lyxor AM announce listing of Lyxor ETF Japan in London
2007-11-21 Standard & Poor's Launches New Shariah Index for Japan
2007-12-10 TSE begins calculating and publishing new sector indices, the "TOPIX-17 Series"
2008-02-20 Korea Exchange, Tokyo Stock Exchange, Inc. and Samsung Investment Trust Management Co., Ltd. announce listing of KODEX Japan ETF (TOPIX 100) in Seoul
2008-06-03 Lyxor AM and TSE introduce first Japan ETF in Hong Kong based on TOPIX®
2008-07-25 Listing of TOPIX ETF in the US
2009-02-09 TSE to begin calculating and publishing "TOPIX Style Index Series" and "TOPIX Composite Index Series"
2009-04-01 Daily reporting of TOPIX on the CCTV Economic Channel begins
2009-05-22 TSE to begin to offer Historical Data of TOPIX Style Index Series
2009-07-01 TOPIX celebrates 40th Anniversary
2009-11-24 TOPIX Futures to trade on NYSE Liffe beginning in the summer of 2010
2010-03-08 TSE to begin calculation of the Tokyo Stock Exchange Dividend Focus 100 Index – a new exchange index focused on dividend yield
2010-06-18 TSE to begin calculating and publishing "Tokyo Stock Exchange REIT Property Sector Index Series" – a new index series focused on REITs' Investment Property Sectors
2010-09-13 Real-time dissemination of "Tokyo Stock Exchange REIT Property Sector Index Series" begins

Statistics (close price)

Year	High	Low
1985	1058.35	916.93
1986	1583.35	1025.85
1987	2258.86	1557.46
1988	2357.03	1690.44
1989	2884.80	2364.33
1990	2867.70	1523.43
1991	2028.85	1638.06
1992	1763.43	1102.50
1993	1698.67	1250.06
1994	1712.73	1448.45
1995	1585.87	1193.16
1996	1722.13	1448.45
1997	1560.28	1130.00
1998	1300.30	980.11
1999	1722.20	1048.33
2000	1754.78	1255.16
2001	1440.97	988.98
2002	1139.43	815.74
2003	1105.59	770.62
2004	1217.87	1022.61
2005	1663.75	1109.19
2006	1783.72	1458.30
2007	1816.97	1437.38
2008	1430.47	746.46
2009	975.59	700.93
2010	998.90	803.12
2011	974.63	706.08
2012	872.42	695.51
2013	1,302.29	871.88
2014	1,454.22	1,121.50
2015	1,702.83	1,343.29
2016	1,558.75	1,192.80
2017	1,844.05	1,452.15
2018	1,911.07	1,415.55

TOPIX Component

Component^[2]	Weight
Transportation equipment	12%
Electric Appliances	12%
Banks	10%
Information and Communication	7%
Chemicals	5%
Machinery	5%
Wholesale trade	4%
Pharmaceutical	4%
Retail trade	4%
Land Transportation	4%
Food	4%
Real Estate	4%
Others	24%

TOPIX New Index Series

TOPIX 1000	Component stocks in the TOPIX 500 and highly market capitalized stocks of the TOPIX small	TOPIX 500	Component stocks in the TOPIX Core 30, the TOPIX Large 70 and the TOPIX Mid 400	TOPIX 100	Component stocks in the TOPIX Core 30 and the TOPIX Large 70	TOPIX Core 30	The 30 most liquid and highly market capitalized stocks
				TOPIX 100		TOPIX Large 70	After the Core 30, the 70 most liquid and highly market capitalized stocks
				TOPIX Mid 400	Excluding TOPIX 100 stocks, these are the remaining stocks in the TOPIX 500
		TOPIX Small	Outside the component stocks in the TOPIX 500 and non-eligible¹ stocks in the TOPIX

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

References

^ ^a ^b "Historical TOPIX Intraday Data (JTPX)". PortaraCQG. Retrieved 2022-09-07.
^ "Archived copy" (PDF). Archived from the original (PDF) on 2015-09-22. Retrieved 2015-09-22.{{cite web}}: CS1 maint: archived copy as title (link)