What is an ETF and how does it work?
Written by Boring Money
15 May, 2025
What is an ETF?
An Exchange-Traded Fund (ETF) is a ready-made bundle of investments - shares, bonds, or other assets - that trades on the stock exchange just like an individual company share. Global ETF assets have just hit a record $23.09 trillion by the end of June 2026, more than double their level two years earlier. That makes ETFs one of the fastest-growing ways for both new and experienced investors to build a portfolio - the equivalent of buying the entire Top 40 chart in one purchase, rather than picking the hits yourself.
The appeal is straightforward. Most ETFs track a market index passively rather than being actively managed, so there's no expensive fund manager taking a cut, meaning more of your money stays invested and working for you. That combination of instant diversification and low running costs makes ETFs a strong fit if you're new to investing, cost-conscious, or want broad market exposure without picking individual shares.
They're not right for everyone, though. You can't choose the specific companies inside an ETF, which can be a sticking point if you invest ethically, and holding several ETFs at once can mean you're unknowingly duplicating the same underlying investments.
Join Boring Money for free to read our full, jargon-free ETF guide - covering whether ETFs are the right fit for your situation, a complete breakdown of the pros and cons, and answers to the questions investors ask most:
Whether ETFs actually suit your goals and risk appetite
The complete pros and cons, explained without jargon
How ETFs are structured and traded, step by step
The most common ETF questions, answered
Key takeaways to check before you invest a penny.
