The FTSE Straits Times Index (abbreviation: STI) is a capitalisation-weighted stock market index that is regarded as the benchmark index for the stock market in Singapore. It tracks the performance of the top 30 companies that are listed on the Singapore Exchange (SGX).

The STI is jointly calculated by the SGX, SPH Media Trust and FTSE Group.

History Early years The STI has a history dating back to its founding in 1966. Following a major sectoral re-classification of listed companies by the Singapore Exchange, which saw the removal of the "industrials" category, the STI replaced the previous Straits Times Industrials Index (abbreviation: STII) and began trading on 31 August 1998 at 885.26 points, in continuation of where the STII left off. At the time, it represented 78% of the average daily traded value over a 12-month period and 61.2% of total market capitalisation on the exchange.

The STI was constructed by SPH, the Singapore Exchange and SPH's consultant, Professor Tse Yiu Kuen from the Singapore Management University (formerly from the National University of Singapore). It came under formal review at least once annually and was also reviewed on an ad hoc basis when necessary. One such review, for instance, raised the number of stocks from 45 to 50, which took effect when trading resumed on 18 March 2005. This change reduced the index representation of the average daily traded value to 60%, while increasing its total market capitalisation to 75%.

Revamp The STI was again revamped and relaunched on 10 January 2008. As part of a new partnership between SPH, SGX and FTSE, the number of constituent stocks was reduced from about 50 to 30 and the index was re-calculated using FTSE's methodology. Besides the STI, the partners also developed a family of indices including the FTSE ST Dividend Index, FTSE ST China Top tradable index, FTSE ST Catalist Index and FTSE ST Maritime Index as well as 19 Supersector and 39 Sector indices. For the purposes of computing the indices, stocks are classified using the Industry Classification Benchmark (ICB).

The family tree of the FTSE ST Index Series:

FTSE ST All-Share Index Straits Times Index FTSE ST Mid Cap Index FTSE ST Small Cap Index FTSE ST China Index FTSE ST China Top Index FTSE ST Maritime Index FTSE ST All-Share Industry Indices (10) FTSE ST All-Share Supersector Indices (19) FTSE ST All-Share Sector Indices (39) FTSE ST Real Estate Index FTSE ST Real Estate Investment & Services Index FTSE ST Real Estate Investment Trusts Index FTSE ST Fledgling Index

The creation of the FTSE ST Index Series was intended to facilitate the creation of financial products such as institutional and retail funds, exchange-traded funds (ETFs), derivatives contracts and other index-linked products. There are currently two ETFs listed on the SGX that track the STI: the SPDR Straits Times Index ETF (formerly known as the streetTRACKS Straits Times Index Fund) (managed by State Street Global Advisors) and the Amova STI ETF (formerly known as Nikko AM Singapore STI ETF) (managed by Amova Asset Management).

On 12 February 2026, the ST Index surpassed the 5,000 mark, hitting a historic milestone. The benchmark index soared as high as 5,004.02 at 9.15 am, up by 0.4 per cent or 19.44 points, driven by gains made by its constituents, including the three Singapore banks, which account for about half of the STI by index weight. The STI ended the day at 5,016.76, after gaining 0.7 per cent or 32.18 points.

Record values CategoryAll-Time Highs Closing 5,801.96 Friday, 4 September 2026 Intraday 5,828.50 Friday, 4 September 2026

Annual Returns The following table shows the annual development of the Straits Times Index, which was calculated back to 1970.Manual of Securities Statistics, Nomura Research Institute, Tokio 1997 YearClosing levelChange in index In points In % 1970 139.06 1971 198.69 59.63 42.88 1972 432.73 234.04 117.79 1973 265.57 −167.16 −38.63 1974 150.82 −114.75 −43.21 1975 236.76 85.94 56.98 1976 254.81 18.05 7.62 1977 264.24 9.43 3.70 1978 349.16 84.92 32.14 1979 435.41 86.25 24.70 1980 660.82 225.41 51.77 1981 780.78 119.96 18.15 1982 732.32 −48.46 −6.21 1983 1,002.03 269.71 36.83 1984 812.61 −189.42 −18.90 1985 620.04 −192.57 −23.70 1986 891.30 271.26 43.75 1987 823.58 −67.72 −7.60 1988 1,038.62 215.04 26.11 1989 1,481.33 442.71 42.62 1990 1,154.48 −326.85 −22.06 1991 1,490.70 336.22 29.12 1992 1,524.40 33.70 2.26 1993 2,425.68 901.28 59.12 1994 2,239.56 −186.12 −7.67 1995 2,266.54 26.98 1.20 1996 2,216.79 −49.75 −2.19 1997 1,529.84 −686.95 −30.99 1998 1,392.73 −137.11 −8.96 1999 2,479.58 1,086.85 78.04 2000 1,926.83 −552.75 −22.29 2001 1,623.60 −303.23 −15.74 2002 1,341.03 −282.57 −17.40 2003 1,764.52 423.49 31.58 2004 2,066.14 301.62 17.09 2005 2,347.34 281.20 13.61 2006 2,985.83 638.49 27.20 2007 3,482.30 496.47 16.63 2008 1,761.56 −1,720.74 −49.41 2009 2,897.62 1,136.06 64.49 2010 3,190.04 292.42 10.09 2011 2,646.35 −543.69 −17.04 2012 3,167.08 520.73 19.68 2013 3,167.43 0.35 0.01 2014 3,365.15 197.72 6.24 2015 2,882.73 −482.42 −14.34 2016 2,880.76 −1.97 −0.07 2017 3,402.92 522.16 18.13 2018 3,068.76 −334.16 −9.82 2019 3,222.83 154.07 5.022020 2,843.81 −379.02 −11.762021 3,123.68 279.87 9.842022 3,251.33 127.65 4.092023 3,240.27 −11.06 −0.342024 3,787.60 547.33 16.892025 4,646.21 858.61 22.67

Constituents The 30 constituents of the STI as of 2 May 2026 are:

+List of STI constituentsStock symbolCompany CapitaLand Ascendas REIT CapitaLand Integrated Commercial Trust CapitaLand Investment City Developments Limited DBS Group Holdings DFI Retail Group Holdings Limited Frasers Centrepoint Trust Frasers Logistics & Commercial Trust Genting Singapore PLC Hongkong Land Holdings Jardine Matheson Holdings Limited Keppel Corporation Keppel DC Reit Mapletree Industrial Trust Mapletree Logistics Trust Mapletree Pan Asia Commercial Trust OCBC Bank SATS Seatrium Limited Sembcorp Industries Singapore Airlines Singapore Exchange Singtel Singapore Technologies Engineering Thai Beverages United Overseas Bank UOL Group Venture Corporation Wilmar International

References

External links Official website Reuters page for .FTSTI Bloomberg page for FSSTI:IND A detailed list of the STI index components with description of each company, logo and link to its website can be found on ASEAN UP Top 30 companies from Singapore’s STI Performance of STI index and its 30 components for the period of 1 week, 1 month, 3 months, YTD, 1 year, 3 years.