How to choose & compare ETFs
How to read an ETF, compare two of them, and judge what actually matters.
Choosing an ETF comes down to a few things you can check on its factsheet: which index it tracks, how big and easy to trade the fund is, its ongoing cost, and how closely it follows that index. Comparing two ETFs is mostly comparing those same numbers side by side.
How to read an ETF factsheet (and KID) in 2 minutes
Every ETF publishes a short factsheet and a key information document. Here are the handful of lines that actually matter.
More in Choosing & comparing
Read them in any order — each one takes a few minutes.
Active vs passive: two ways to run a fund
A passive fund quietly copies a list. An active fund pays a manager to try to beat it. That one choice drives most of what you pay.
Read → · 2 minETF vs individual stocks: a basket or single names?
One share is a bet on one company. An ETF spreads the same money across hundreds. Here is the honest trade-off.
Read → · 2 minWorld ETF vs S&P 500: how to compare them
Both are popular first ETFs. One holds the whole developed world; the other, 500 US giants. Here is how to weigh them.
Read → · 2 minMSCI World vs FTSE All-World: what’s the difference?
They sound almost identical, but one includes emerging markets and the other doesn’t. Here is the single difference that matters.
Read → · 2 minDeveloped vs emerging markets: what’s the difference for an ETF?
Emerging markets promise faster growth but a bumpier ride. Here is what the label means and how much most beginners hold.
Read → · 2 minCurrency-hedged or not? Hedged vs unhedged ETFs
A currency-hedged ETF strips out foreign-exchange swings; an unhedged one lets you ride them. Here is when each makes sense.
Read → · 2 minGrowth vs value ETFs: two investing styles
Growth leans toward fast-expanding companies; value leans toward cheaper, steadier ones. A broad fund quietly holds both.
Read → · 2 minLarge-cap vs small-cap ETFs: does company size matter?
‘Cap’ is just company size. Large-cap means the household names; small-cap means smaller, bumpier up-and-comers.
Read → · 2 minETF vs ETC: how gold and commodity funds differ
Gold trackers look like ETFs on your broker’s screen, but they’re technically ETCs. Here’s why, and what it changes.
Read → · 2 minSmart-beta & factor ETFs: index investing with a twist
Smart-beta funds sit between a plain index tracker and an active manager — still rules-based, but deliberately tilted toward traits like ‘value’ or ‘quality’. Here’s what that means, and the catch.
Read → · 2 minDoes an ETF’s size matter? Making sense of AUM
Every ETF lists how much money it holds — its ‘AUM’. Bigger sounds safer, but size tells you fewer things than you’d think. Here’s what it actually signals.
Read → · 2 minWhy can’t I buy famous US ETFs like VOO in Europe?
Try to buy a well-known US ETF (VOO, VTI, SPY) from a European account and your broker blocks it. It’s not the broker being awkward — it’s an EU rule, and there’s an easy way around it.
Read → · 2 minHow to read an ETF’s name (it’s a spec sheet, not alphabet soup)
‘iShares Core MSCI World UCITS ETF USD (Acc)’ looks like a password. It’s actually a tidy label — once you know the six parts, you can decode any ETF at a glance.
Read → · 2 minETFs vs a robo-advisor: do it yourself or let a robot?
A robo-advisor builds and runs an ETF portfolio for you, for a fee. Buying ETFs yourself is cheaper and not that hard. Here’s the honest trade-off between convenience and cost.
Read → · 2 minEqual-weight vs market-cap ETFs: does the weighting matter?
Two funds can track the same list of companies yet hold them completely differently. ‘Market-cap’ lets the giants dominate; ‘equal-weight’ gives everyone the same slice. Here’s the trade-off.
Read → · 2 minHow "cheaper than 80% of similar ETFs" is actually calculated
A peer percentile is a relative read, not a licensed benchmark — here’s exactly how the comparison group is built, the math behind the number, and where it gets shakier.
Read → · 3 minBuilding a systematic ETF screen: stacking the advanced filters into one real constraint set
A worked walkthrough of combining domicile, replication, hedging, risk ceiling and cost ceiling into one real screen — and reading what survives, not just counting it.
Read → · 3 minCommon questions
What should I look at first on a factsheet?
The index it tracks, the ongoing charge, the fund size, and how closely it has followed its index.
Is a bigger fund always better?
Not automatically, but larger funds tend to be easier to trade and less likely to close. It is one factor among several.
What does it mean for an ETF to track an index?
It tries to copy a published list of investments as closely as it can, rather than a manager picking winners.
Key terms on this page
Where to go next
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Finance Hamster provides educational information about ETFs and investing. It is not investment, tax, or legal advice, and not a recommendation to buy or sell any security. Markets carry risk; do your own research or consult a licensed adviser.