HK33/HKD

What is the Hang Seng Index? A beginner’s guide

The Hang Seng Index (HSI) is a major stock market index in Hong Kong and one of the oldest in the region.

It comprises large-cap (large market capitalisation), highly liquid stocks listed on the Hong Kong Stock Exchange.

Features

Launched in 1969, the HSI began with a base value of 100, referencing stock levels on 31 July 1964.

Constituent stocks are classified into four sectors for balanced representation: Finance, Utilities, Properties, and Commerce & Industry.

Calculation method

The index is calculated using a free-float-adjusted market capitalisation-weighted average – similar to methods used by S&P 500 and NASDAQ.

This approach makes the index more responsive to movements in large-cap stocks.

The original index included 33 stocks (hence “Hang Seng 33”).

It expanded to 50 in 2012 and is on track to reach 100.

As of May 2025, the index includes 83 companies (Source: Hang Seng Indexes official website).

Key constituents include:

Constituents of Hang Seng Index
Name Sector
Tencent Technology
Alibaba Consumer Goods
HSBC Holdings Finance
Xiaomi Technology
China Construction Bank Finance

Hang Seng Index vs Shanghai Composite Index

The HSI tracks stocks listed in Hong Kong and is open to global investors.

By contrast, the Shanghai Composite Index focuses on domestic or China A-shares and is more influenced by the Chinese government regulations and capital controls.

Key points for Hang Seng Index analysis

Mainland China’s influence

Many mainland Chinese firms are listed on the Hong Kong Stock Exchange.

Their performance depends heavily on China’s economic and regulatory environment.

HKD-USD peg

The HKD is pegged to the USD at 7.75–7.85 HKD/USD.

US monetary policy directly impacts the economy of Hong Kong.

Two main ways to invest in Hang Seng Index

1: ETFs (Exchange-Traded Funds)

ETFs are investment funds listed and traded on a stock exchange which allow investors to buy and sell a basket of assets similar to an individual stock..

While the Singapore Exchange does not list a general Hang Seng ETF, it offers the “Lion-OCBC Securities Hang Seng Tech ETF” which comprises the 30 largest technology companies listed in Hong Kong..

The “iShares Core Hang Seng Index ETF” is available on the Hong Kong Exchange and can be purchased through brokers.

2: CFDs (Contracts for Difference)

CFDs are derivatives that allow traders to trade on price movements of an underlying asset without owning the underlying asset.

You can use leverage to open a short or long position without transferring actual assets.

Summary

The HSI is one of Hong Kong’s core stock indices, comprising large-cap, highly liquid companies listed on the exchange.

Many of its constituents are mainland Chinese firms, linking the index closely with China’s economic and policy shifts.

OANDA Asia Pacific Pte. Ltd. is a broker based in Singapore and regulated by the Monetary Authority of Singapore to provide a platform for trading CFDs on various underlying asset classes, including indices such as the Hong Kong 33.

CFD trading offers unique advantages, such as 24-Hour trading and the ability to use leverage by depositing only a fraction of the total market value to open a position. These features are not available in individual stock trading.

If you are interested in trading CFDs with OANDA Asia Pacific Pte. Ltd., please consider opening an account by clicking on the following link. Please note that CFDs are high risk instruments and come with a high risk of losing money rapidly due to leverage.

FAQs on Hang Seng Index CFDs

How much do I need to start?

As of 18 June 2025, the minimum margin is approx. 194 SGD.

Formula:

Current index × HKD/SGD rate × 1 (lot size) × 0.05 (5%)

e.g.

23,680 × 0.164 × 1 × 0.05 ≈ 194 SGD

What are the trading hours?

Available Mon–Fri (Singapore time):

09:16–11:59, 13:01–16:29, 17:16–02:59

> See: Index CFD trading hours

What is the maximum leverage?

Up to 20x leverage is available for both individual and corporate accounts.

> See: Retail CFD margin rates