How to Invest in a Global Stock Index

Many investors use global stock indices as a tool for diversifying their investment portfolios. This moneyland.ch guide answers the most important questions about world ETFs.

What is a global stock index?

A global index is an international stock index that is designed to be a benchmark of the worldwide stock market. The principle is similar to that used for national benchmark stock indices like the Swiss SMI and the German DAX. But instead of tracking companies in a single country, global stock indices track companies all over the world. Most global stock indices are usually calculated in US dollars.

There are no clearly defined criteria for the makeup of global indices. Most of these indices use market capitalization as the primary criterion for determining which stocks are included.

Which global stock indices are there?

There are numerous indices that are meant to fully or largely reflect the global stock market. But a look at major indices shows that most indices are not truly global, in the strict sense of the term. While they do represent a large share of worldwide market capitalization, there are numerous countries that are not represented. Many of these indices exclude entire continents. For example, only one of the six major global indices listed below includes African stocks (see Table 1).

Table 1: Major global stock indices compared

Information as per data provided by index publishers. Date: December 20, 2024.

Note that the Hong Kong is considered a separate country in the world indices, even though it is politically part of the People's Republic of China. You can find more information about investing in stocks and ETF from Asia in the moneyland.ch guide.

How can I invest in global stock indices?

The simplest and most cost-effective way to invest in global stock indices is to buy shares in an exchange-traded fund (ETF) for the index of your choice. These index funds, which are traded on stock exchanges, invest in the stocks tracked by an index with the aim of replicating the index’s performance as accurately as possible. The ongoing cost of using these funds, the total expense ratio (TER), is relatively low, especially when compared to actively managed mutual funds. All you need in order to buy shares in an ETF is a stock brokerage account from a Swiss bank, or an account with one of the Swiss neobanks Yuh or Neon. Be aware that neobanks have a limited selection of ETFs, so some of the ETFs listed in Table 2 may not be available.

Alternatively, you can also use a digital asset management service (robo advisor) like True Wealth, Selma, Clevercircles, Cleverinvest, or Swissquote Invest Easy. While many robo advisors do not let you choose which ETFs should be included in your investment portfolio, many Swiss robo advisors do make use of ETFs based on global indices. You pay an asset management fee on top of the fund TERs, but in exchange, you avoid brokerage fees, and the robo advisor handles the investing for you.

Table 2: The cheapest ETFs for global stock indices based on TER

Table 2 shows the cheapest available ETF for each global index based on TER. Date: December 20, 2024.

Using ETFs that are domiciled in Ireland is advantageous from a tax perspective.

How much does it cost to invest using ETFs?

The total expense ratio (TER), which shows the annual cost of using a fund, is the most important factor. But in addition to the fees charged by the ETF itself, there are also other costs to pay attention to. Your bank may charge you brokerage fees when you buy and sell shares in an ETF. Brokerage fees vary broadly between banks. Custody fees also vary between banks.

Swiss stamp duties are another cost to be aware of. These are identical no matter which Swiss bank you use.

Some ETFs are listed on more than one stock exchange, in which case they may be traded in several different currencies. Many banks let you choose between several different stock exchanges for buying the same ETF. In this case, which exchange you choose does not generally make a substantial difference.

What are the issues and risks of global stock indices?

Most global indexes are relatively well-diversified. But in spite of that fact, you as an investor are not protected from potential losses. Investing in stocks always comes with a risk.

It is also important to relativize the diversification of these indices. While they do normally cover many countries and industry sectors, and the lion’s share of global market capitalization, a closer look at their compositions reveals a clear imbalance. Developed countries are strongly over-represented in comparison to developing countries.

In most global indexes, just the United States alone makes up much more than half of the total index (see Table 3). Developing countries are normally not included at all. Indicators like a country’s population or gross domestic product (GDP) are not accounted for.

Table 3: US components of global stock indices

Date: December 20, 2024.

The best-known global indices primarily include large corporations. Small and mid-sized companies are usually not represented, despite their substantial economic significance. Nonetheless, there are also specialized global indices representing mid-cap and small-cap companies.

What are the alternatives?

If you want to geographically diversify your investment portfolio but find the dominance of US stocks in global indices limiting, you can use other international stock indices in place of or in conjunction with major global indices. Many index publishers, including MSCI, also offer versions of their global indices that explicitly exclude US stocks.

You can also use many different ETFs that invest in specific regions or countries. This enables you to avoid the imbalances of global stock indices and to choose how much weight you give to different regions.

Examples of regional indexes include the STOXX Europe 600 index, the S&P Africa 40 index, and the S&P Latin America 40 index. If you want to narrow down your portfolio components to specific countries, you can use national indices like the Swiss SMI, the German DAX, or the French CAC 40. Just be aware that if you opt for this strategy, you will have to invest in many different ETFs in order to get a similar diversification to that offered by global indices.

Indices that focus on high-growth regions and developing countries can also be used to diversify your portfolio. Examples include the MSCI Emerging Markets Index and the MSCI Frontier Markets Index.

Which global stock index has the best performance?

The Dow Jones Global Titans 50 Index showed the highest performance in a direct comparison of select stock indices (see Table 4). But performance figures can vary depending on the timeframe used for comparisons.

Important: Past returns are not a sure indicator of future developments. While it is possible to achieve high returns by investing in stocks and ETFs, it is also possible to make substantial losses.

Table 4: Performance of global stock indices compared

Index performance (price index) and currency exchange calculations are based on the closing rates on December 19, 2014 and December 19, 2024. Sources: Investing.com and Onvista.de.

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