ETF essentials · 2 minute read
Past performance: what can it tell you about an ETF?
The short answer
Past performance shows how an ETF behaved during a particular period. It can help explain risk and tracking, but it cannot tell you what the ETF will return next.
Why it matters
Performance tables can encourage investors to choose whichever fund rose most recently. That can be misleading because returns depend on the period selected, market conditions, currency and the exposure being measured.
Past performance can still be useful for checking:
- How the ETF behaved when markets fell
- Whether it followed its index closely
- How volatile its returns were
- Whether a specialist strategy differed from the broad market
A new ETF may show the historical return of its index before the fund launched. That is not the same as the ETF’s live performance.
A simple example
An ETF showing a strong one-year return may have recovered from an earlier fall or benefited from a short-lived trend.
Looking at several periods, including difficult markets, gives a more balanced picture than ranking funds by the latest year.
What to check
- Which period is being shown?
- Are returns annual or cumulative?
- Are they measured in the same currency?
- Is the figure for the ETF or a back-tested index?
- How did the fund behave during market falls?
- Is performance shown after fund charges?
Key term explained
A back-tested return applies an index’s rules to historical data before the index or ETF existed. It is hypothetical, not a return earned by investors in the fund.
Use past performance to understand behaviour, not to predict the next winner.