What's actually inside an ETF, explained plainly.
ETF Insider is a small, independent resource based in Switzerland. We explain how exchange-traded funds generally work — structure, costs, tracking — no products, no fund picks, no personal advice, no cost.
Three ideas behind how ETFs work.
A fund is a basket, not a bet
An ETF generally holds many underlying assets at once — the structure itself is different from picking a single stock.
Costs compound quietly
Expense ratios look small individually but affect returns cumulatively over long periods — worth understanding either way.
Tracking isn't perfect
Even index-tracking funds can deviate slightly from the index they follow — a gap worth knowing exists.
Structure first, opinions never.
Most ETF content online ranks funds or predicts performance. ETF Insider was built by a small group of finance writers who wanted to do neither — just explain the structure clearly enough that you can read a fund's own documentation and actually understand it.
- Every guide is free to read, indefinitely.
- We do not sell courses, coaching or financial products.
- We never recommend specific funds, brokers or providers.
A short path to reading a fund's factsheet.
Learn the vocabulary
Start with our glossary so terms like expense ratio, tracking error and AUM make sense immediately.
Understand the structure
Read how funds are built, held and priced, so a factsheet stops looking like a wall of numbers.
Talk to a licensed professional
For decisions involving your own money, a qualified advisor can account for your full situation — we can't.
"We'd rather help you read a fund's own factsheet with confidence than tell you which fund to buy. One of those is education. The other isn't ours to give."
— Editorial note from the ETF Insider team