An ETF (Exchange Traded Fund) is an investment fund that you buy and sell on the stock exchange, just like a regular stock. The difference: with an ETF, you don't buy a single company, but a whole basket of investments at once.
How does an ETF work?
An ETF usually tracks an index, sector, or theme. If you buy an ETF that tracks the AEX, for example, you immediately invest in all 25 companies in that index, from ASML to Shell. The ETF's price moves in line with the underlying index.
You don't have to choose which stocks to buy yourself. The ETF does it for you, at low cost.
Why are ETFs popular?
Instant diversification
With a single purchase, you invest in dozens or even hundreds of companies. This reduces the risk that a poorly performing stock impacts your entire portfolio.
Low costs
ETFs are passively managed. They track an index without a fund manager actively making choices. As a result, management fees (the TER, Total Expense Ratio) are often a fraction of what actively managed funds charge. Typically 0.1% to 0.5% per year.
Flexibility
Unlike traditional investment funds, you can buy and sell ETFs throughout the day on the stock exchange. The price changes in real time.
Transparency
You know exactly what you're investing in. The composition of an ETF is public and updated daily.
Types of ETFs
Index ETFs
Track a specific index such as the AEX, S&P 500, or MSCI World. The most common choice for long-term investors.
Sector ETFs
Focus on a specific sector: technology, healthcare, energy, or financials. Useful if you believe a particular sector will perform well.
Thematic ETFs
Invest around a theme such as clean energy, robotics, artificial intelligence, or cybersecurity.
Bond ETFs
Invest in government or corporate bonds. Suitable for a more defensive part of your portfolio.
Crypto ETFs
Relatively new, but increasingly popular. Invest in Bitcoin, Ethereum, or a basket of cryptocurrencies without having to manage a wallet yourself.
ETFs vs. individual stocks
The main difference lies in risk and involvement:
- ETFs offer lower risk through diversification, less effort, and lower costs, but also less chance of extreme outperformance.
- Individual stocks give more control and higher potential returns, but also higher risk. You need more knowledge.
Many experienced investors combine both: a foundation of ETFs for stability, supplemented with individual stocks or crypto for additional returns.
What should you watch out for?
- TER (Total Expense Ratio): the lower, the better. Above 0.5% is expensive for an index ETF.
- Fund size: larger funds are generally more liquid and stable.
- Replication method: physical (actually buys the stocks) is more transparent than synthetic (uses derivatives).
- Distributing vs. accumulating: a distributing ETF pays out dividends, an accumulating ETF automatically reinvests them in the fund. For long-term growth, accumulating is often more tax-efficient.
ETFs and your portfolio
ETFs suit every risk profile. A Guardian chooses broad index ETFs and bond ETFs. An Accelerator combines sector ETFs with crypto ETFs and individual positions.
The most important thing is that ETFs fit within your asset allocation and that you know what you're buying, even when it's a basket.