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Straits Times Index

STI
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STI

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STI
STI
Straits Times Index
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Overview

The Straits Times Index (STI) is Singapore’s leading benchmark stock index, tracking the performance of the top 30 companies listed on the Singapore Exchange (SGX). These companies are selected based on market capitalization and liquidity, offering a clear snapshot of the country’s corporate and economic health. The STI is widely regarded as a measure of Singapore’s equity market performance and investor sentiment.

Launched in 1966 and revamped in 2008 in collaboration with FTSE, the index includes major players in banking, real estate, telecommunications, consumer goods, and industrials. Key constituents include DBS Group Holdings, Singapore Telecommunications (Singtel), OCBC Bank, and CapitaLand Investment. Due to Singapore’s role as a global financial hub, many STI companies have regional or global operations, offering investors both local exposure and international reach.

The STI is also known for its defensive characteristics, with a strong presence of stable, dividend-paying companies. This makes it attractive for income-focused investors and those seeking relatively lower risk in the Asia-Pacific region. While not as growth-oriented as some tech-heavy indices, the STI provides solid fundamentals, political stability, and sound governance — all key traits for long-term investment strategies.

Price Chart

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Technical Details

Exchange Singapore Exchange (SGX)
Number of Constituents 30 companies
Weighting Method Free-float market capitalization-weighted
Launch Date August 31, 1966
Currency Singapore Dollar (SGD)
Key Sectors Finance, Real Estate, Telecommunications, Consumer Services, Industrials
Notable Companies DBS Group, OCBC, UOB, Singtel, CapitaLand Investment
Trading Hours 9:00–12:00 & 13:00–17:00 SGT (Singapore Time)

Why Trade Straits Times Index?

Stable and Transparent Market

Singapore’s robust regulatory and legal framework enhances investor confidence.

Strong Dividend Yields

Many STI constituents offer consistent dividends, ideal for income investors.

Defensive Sector Weighting

Heavy focus on banks and telecoms provides stability in volatile times.

Global Exposure via Regional Giants

STI companies often operate across Southeast Asia and beyond.

Broad Access via ETFs and Derivatives

The STI is accessible through a variety of investment vehicles including ETFs and futures contracts.

Pros & Cons

Advantages

  • Represents Singapore’s top-performing blue-chip companies
  • Strong presence of banking, real estate, and telecom sectors
  • Stable economy and robust regulatory framework
  • Low volatility compared to other Asian indices
  • Transparent and well-governed exchange environment

Disadvantages

  • Limited exposure to tech and innovation sectors
  • Small number of constituents (30 stocks) limits diversification
  • Sensitive to regional trade and global economic cycles
  • Slower growth compared to emerging market indices
  • Heavily weighted toward a few dominant companies

Frequently Asked Questions

What is the Straits Times Index (STI)? +
The STI is Singapore’s primary stock index, tracking the 30 largest and most liquid companies on the Singapore Exchange. It represents the overall performance of Singapore’s equity market.
How is the STI calculated? +
The index uses a free-float market capitalization-weighted methodology, where each constituent’s influence is based on the value of shares readily available for trading.
Who can invest in the STI? +
Both domestic and international investors can access the STI through direct stock investment, ETFs like the SPDR STI ETF, and index-linked derivatives.
What industries are most represented in the STI? +
The STI is heavily weighted in finance, real estate, and telecommunications, reflecting Singapore’s economic strengths and structure.
Is the STI a good choice for long-term investment? +
Yes, especially for conservative investors looking for stability, regular dividends, and exposure to a mature, well-regulated market in Asia.
What are the risks of investing in the STI? +
The main risks include regional economic slowdowns, limited exposure to high-growth tech sectors, and overreliance on a few large-cap companies for index performance.
How often is the STI reviewed? +
The index is reviewed quarterly to ensure that the constituents continue to meet liquidity and market cap criteria, keeping the index reflective of current market dynamics.

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