ETF (börsengehandelter Fonds)
An ETF (Exchange Traded Fund) is a fund traded on a stock exchange like a single share, holding a basket of many underlying investments — most often every company in a stock market index. Buying one ETF share buys a proportional slice of everything the fund holds at once, which is how a single purchase can reach hundreds or thousands of companies without placing a separate order for each one.
Why it matters
ETFs are one practical delivery mechanism for diversification (spreading money across assets that don't all move together): instead of researching and buying individual companies one at a time, a single ETF position tracks an index automatically and holds all of it. That is why ETFs are a common building block for a Sparplan (recurring automatic investment plan) — a fixed monthly amount can flow into one ETF without a fresh decision about what to buy each time. Whether an ETF suits any particular goal is a separate question this card doesn't settle; it explains what the instrument is, not what to hold. Ongoing costs and same-day tradability distinguish ETFs from actively managed funds, though judging any specific ETF (fund size, replication method, cost ratio) is a separate skill from understanding what an ETF is.
Worked examples
1. One purchase, many companies. An ETF share priced at an illustrative €95 tracks a broad developed-market index made up of an illustrative 1,300 companies. Buying that single share is economically equivalent to buying a tiny fraction of each of those 1,300 companies directly — the ETF does the aggregation so the buyer places one order instead of 1,300.
2. Cost drag over time. ETFs that passively track an index typically charge a lower TER (Total Expense Ratio, the fund's annual cost as a percentage of assets) than actively managed funds, where a manager picks holdings by hand. The gap compounds over long horizons:
| ETF (illustrative TER 0.2%/year) | Actively managed fund (illustrative fee 1.5%/year) | |
|---|---|---|
| Gross return before costs (illustrative) | 6%/year | 6%/year |
| Net return after costs | 5.8%/year | 4.5%/year |
| €10,000 invested, after 20 years | ~€30,900 | ~€24,100 |
The roughly €6,800 gap comes entirely from the extra 1.3 percentage points of annual cost compounding over 20 years — this example holds gross performance identical between the two to isolate the cost effect; it ignores taxes and assumes both funds actually deliver the same gross return, which isn't guaranteed for an actively managed fund.
Two other distinctions matter when reading an ETF's name or factsheet. Accumulating (thesaurierend) ETFs reinvest dividends automatically inside the fund; distributing (ausschüttend) ETFs pay dividends out to the holder's account. And in Germany, an ETF's underlying securities are legally held as Sondervermögen (ring-fenced fund assets) — separate from the broker's or fund provider's own balance sheet, so they aren't claimed by that firm's creditors if it becomes insolvent.
Check yourself
An investor buys one share of an ETF that tracks an index of 1,300 companies. What has the investor actually bought?
€10,000 is invested for 20 years. Fund A (an index-tracking ETF) delivers a 5.8% net annual return after costs. Fund B (an actively managed fund) delivers a 4.5% net annual return after costs. Rounded to the nearest €100, roughly how many more euros does Fund A end up with than Fund B after 20 years?
Why does an accumulating (thesaurierend) ETF typically produce a different account balance pattern than a distributing (ausschüttend) ETF, even if both track the identical index?
A broker holding a customer's ETF shares becomes insolvent. What happens to those ETF shares, given that they are legally held as Sondervermögen (ring-fenced fund assets)?