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Guide · 5 minutes

What is an ETF? Explained simply, in 5 minutes

Seven short lessons, no jargon, and a 4-question quiz at the end. It’s not rocket science.

  1. 1What an ETF is

    ETF stands for Exchange Traded Fund: a fund you buy and sell on the stock exchange, like a single share.

    Inside there isn’t one company but hundreds or thousands. With €100 in a world ETF you own a tiny slice of about 1,300 large companies in 23 countries: Apple, Nestlé, Toyota, and all the others.

  2. 2What an index is

    An index is a list of companies chosen with fixed rules. The ETF simply copies it: no one picks the “best” companies.

    • MSCI World: about 1,300 large companies in 23 developed countries.
    • MSCI ACWI: also adds emerging countries, about 2,500 companies.
    • FTSE All-World: developed and emerging, over 4,000 companies.

    Bigger companies weigh more. Today the US is about two thirds of a world index.

  3. 3Stocks and bonds

    Stocks are slices of companies: they grow more over the long run, and fall more in bad years.

    Bonds are loans to governments or companies that pay interest: calmer, but on average they earn less.

    There are stock ETFs, bond ETFs and all-in-one ETFs that mix both (for example 80% stocks and 20% bonds) and keep the mix for you.

  4. 4Accumulating or distributing

    Companies pay part of their profits as dividends. An ETF can:

    • Accumulating (Acc): reinvest them automatically. The simplest way to let your money grow, and usually no tax until you sell.
    • Distributing (Dist): pay them into your account a few times a year. Useful if you want an income, but they are taxed each time.

  5. 5Risk: why one basket is safer than one company

    One company can go bust and its shares go to zero. For a world index to go to zero, thousands of companies in dozens of countries would all have to fail together.

    The value still moves a lot: world stocks fell by about half in 2007–2009 and by about a third in a few weeks in 2020. Both times they recovered. That’s why you only invest in ETFs money you won’t need for 10 years or more.

  6. 6Costs

    An ETF has a yearly cost, the TER: for a world ETF often 0.1–0.25% a year, taken from the fund automatically. Then there may be broker fees per purchase, and taxes when you sell.

    A fund from your bank can cost 1.5–2% a year. It looks small but adds up: see how much.

  7. 7Is my money safe?

    In the EU most ETFs are UCITS: a set of strict rules on diversification and safety. The money inside the ETF is held by a depositary bank, separate from the company that runs it.

    At the broker, your ETFs are kept separate from the broker’s own money: if it goes bust, they are given back to you, and an investor compensation scheme covers you if something is missing.

    What is not protected: the market going down. That’s the risk you take for the growth.

    How to buy your first ETF, step by step →

Quick quiz: did it stick?

4 questions. Tap an answer.

1. With €100 in an MSCI World ETF you own…

2. An “Acc” (accumulating) ETF…

3. Markets fall 30% a month after you start. The usual advice is…

4. Which cost matters most over 20 years?

Questions

Is an ETF the same as a stock?
You buy and sell it like a stock, on the exchange. But a stock is one company, while an ETF holds hundreds or thousands of them.
Do I need a lot of money?
No. Many brokers let you invest from a few tens of euros a month, and you often get fractions of a share.
Is an ETF the same as an index fund?
Very similar: both copy an index at low cost. An ETF is traded on the stock exchange during the day; an index fund is bought directly from the fund company at the end-of-day price.

Now: your plan

Answer 3 questions and get a one-page plan: how much to keep in the bank, how much to invest in ETFs each month and how to set it up.

Make my plan

Not financial advice. An educational guide. Investing in ETFs can lose money. Index figures are approximate, as of 2026.

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