"By periodically investing in an index fund, for example, the know-nothing investor can actually outperform most investment professionals."
– Warren Buffett, in Berkshire Hathaway shareholder letter in 1993
These are the wise words Warren Buffett wrote approximately 33 years ago in his letter to shareholders, on the topic of how retail investors should diversify.
Buffett advocated - and still does - that index-investing should be the appropriate one for retail investors. In his words, “...when an investor who does not understand the economics of specific businesses nevertheless believes it in his interest to be a long-term owner of American industry… that investor should both own a large number of equities and space out his purchases.”
Index investing, which involves tracking market indices rather than trying to beat them, has gained traction due to its simplicity and cost-effectiveness. It is often referred to as a passively-managed investment strategy.
Why choose unit trusts for passive index investing?
When it comes to index investing, the investment vehicle that comes to mind is typically exchange-traded funds (ETFs). But unit trusts and mutual funds can provide unique benefits for long-term investors that ETFs do not.
To begin with, the largest and most liquid ETFs are often priced in hard currencies, such as US dollars, which may not be the natural base currency for many investors. In order to invest in one of these ETFs, a Hong Kong investor would need to first convert their money into foreign currency (i.e. HKD to USD), thus incurring a conversion fee just to invest.
An additional fee would have to be paid upon redemption, when the investment proceeds is converted back to local currency. This double conversion when owning foreign-listed ETFs adds an additional layer of fees and administrative complexity, requiring extra time and effort to manage currency exposure. Unlike ETFs, unit trusts also have no bid-ask spread concerns, potentially resulting in lower overall costs. Finally, they may have lower tracking errors, which results in a closer mirroring of the index's performance.
What is tracking error?
Tracking error happens because indexes are theoretical. While replicating the index performances, managers of index funds and ETFs face challenges and frictions, such as transaction costs and timing differences, which can cause performance differences with the index. Asset managers work to minimise these frictions, but it is an additional issue investors need to be aware of.
Most importantly, most Hong Kong investors could be subject to a 30% dividend withholding tax on US-listed ETFs as there is currently no tax treaty between the US and Hong Kong.
Learn more: An inconvenient truth: Taxes on US-listed ETFs
How clients can adopt the passive investing strategy in their portfolios through Endowus
The Endowus Investment Office has curated our Passive Index Collection, which consists of funds that track various broad market indices, such as the S&P 500, the MSCI World, or the Bloomberg Global Aggregate Index.
By investing in these funds, clients can potentially enjoy instant diversification across multiple companies, sectors, and geographies. This helps reduce the risk associated with holding individual stocks.
Passive index collection: List of funds
Capturing the growth of the broader markets
History proves that the world’s largest companies are unlikely to remain the largest. Even very well-known, big companies can be replaced within their industry by newcomers and disruptors.
Rather than buying and holding individual companies, buy-and-hold indices or broad-based strategies can capture the overall growth of a market or several markets.

Why invest passive index funds with Endowus?
Index funds tend to be rather straightforward, easy-to-own, and cost-effective investment products. Regardless, cost still matters a lot when comparing different investment vehicles and remains the best predictor of returns.
Endowus is one of the most cost-efficient ways to access mutual funds at zero subscription fees and switching costs. This is achieved through providing access to lower-cost institutional share class funds, which are not normally available to retail investors at other distributors, as well as rebating a 100% of trailer concessions back to our clients. Endowus clients can also access these same low fees when they transfer their mutual fund holdings from other financial institutions through transfers, with zero transfer fees.
As a result, we have helped our clients achieve an estimated US$50 million of cost savings per year. That can lower your investing expenses over time and can potentially allow you to pocket a larger share of your returns.
Click here to get started on Endowus today or check out our other curated fund offerings on Endowus Fund Smart.
Frequently asked questions
What is an index fund and how does it work?
Index funds are investment vehicles that track the performance of a specific market index, such as the S&P 500 or the MSCI World Index. The objective is to match the performance of the indices, rather than to outguess and beat the market, by replicating their broad market exposure.
Is index fund good for beginners?
Passive investing offers a stress-free yet scalable way to diversify your portfolio. By purchasing units in index funds, you can effectively own hundreds or even thousands of companies. For instance, the MSCI World Index comprises 1,429 constituents across 23 developed markets. This approach aligns with Buffett's wisdom, allowing you to space out purchases and benefit from long-term market growth without the need for extensive stock-picking expertise.
Are all index funds ETFs?
This is a big misconception that all ETFs are passively tracking the markets, while all mutual funds are actively managed. The truth is, that numerous ETFs are not indexed or traded actively, and many also track different sub-sectors of a single country’s market. At the same time, there are also unit trusts that are passive-indexed funds.
What should I note if I invest in passive indexes?
The weighting method of the index being tracked, the exposure of the underlying index, and tracking error and potential active risk in your “passive” index investment are the three things to know before adopting an index investing strategy.
Read more:
- ETF vs mutual fund — which is better?
- An inconvenient truth: Taxes on US-listed ETFs
- Why invest through Endowus
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