Exchange-Traded Fund
An exchange-traded fund is an investment fund whose shares trade on a stock exchange throughout the day, usually tracking an index — a market, a sector, bonds, gold, since 2024 bitcoin — for fees of hundredths of a per cent. Creation and redemption by authorised participants keep its price near the value of its holdings. It is the building block of robo-advisers and the product that took the fund industry's fees away.
- Also known as
- ETF, Exchange-traded product, Index ETF
- Used at
- the portfolios of every robo-adviser and most wealth platforms; retail and institutional investing generally; over $13 trillion invested globally by 2024, with US spot bitcoin ETFs the fastest-growing launches in the industry's history
- Binding
- a regulated fund (UCITS in Europe, the 1940 Act in the US) with a prospectus, a custodian, a listing and market makers
- Typical fee
- 0.03–0.20% a year for broad index ETFs; 0.2–0.7% for thematic, active and commodity ETFs; against 0.5–1.5% for traditional actively managed funds
- Typical mechanism
- authorised participants (large brokers) exchange baskets of the underlying securities for new ETF shares (creation) and the reverse (redemption), arbitraging any gap between the ETF's price and its net asset value — which is why ETFs trade near their value and why they are tax-efficient in the US
- Parties
- the sponsor (BlackRock's iShares, Vanguard, State Street and hundreds of others), the authorised participants, the exchange, the index provider, and the investors
How an ETF works in practice
An investor wants exposure to global equities. Instead of buying 3,000 stocks or a mutual fund priced once a day, she buys shares of an ETF tracking a global index, on the exchange, at 11:14, at a price the market makers quote around the fund's live value. The ETF holds the index's stocks in proportion; its value moves with them; her shares are worth her share of the holdings. If demand for the ETF pushes its price above its holdings' value, an authorised participant buys the underlying stocks, delivers them to the fund in exchange for new ETF shares, and sells those shares — profiting from the gap and closing it. The reverse when the price is below.
The economics made the fee compression. An index ETF has no stock-pickers, no distribution network paid by trail commissions, and a structure that scales; at 0.05% a year on $100bn it earns $50m and runs on a small team. Active managers at 1% could not compete on cost, and the money moved: index and ETF assets passed active assets in the US in 2024. Wealthtech is built on the result — a robo-adviser's whole portfolio is six to ten ETFs, which is why it can charge 0.25% and still earn a margin.
Fintech M&A touches ETFs at the edges: the platforms that distribute them, the index and data providers the sponsors pay, and since 2024 the crypto ETFs that brought bitcoin into brokerage accounts and drew billions in their first months.
Example
A robo-adviser builds its balanced portfolio from seven ETFs: global equities (0.07%), emerging markets (0.18%), global bonds (0.10%), inflation-linked bonds (0.12%), small caps (0.15%), property (0.20%) and cash (0.05%) — a weighted fund cost of 0.10% a year. It charges its customers 0.25% on top: total 0.35% against the 1.2% a traditional adviser's actively managed portfolio costs. On a $30,000 account the difference is $255 a year, which over twenty years at 5% growth is about $10,000 of the customer's money — the robo-adviser's whole marketing message, and the reason the wealth managers it took share from either bought the robo-advisers or built their own.
Common mistakes
- Comparing ETFs on the headline fee alone; tracking error, spread and liquidity cost money too. - Assuming an ETF is always liquid because its holdings are; in a stressed market the creation mechanism can widen the spread. - Treating a thematic or leveraged ETF as an index fund; it is a bet, priced like one. - Wealth platforms building on ETFs with distribution fees the ETF sponsor does not pay, and wondering where the revenue is. - Confusing an ETF's price with its net asset value on a day the arbitrage has broken.