Look at the index before the name
ETF names carry words like semiconductors, dividends or US large caps, but what a fund actually holds is set by the index it tracks. Two 'semiconductor' funds can differ a lot: one index may hold many stocks with even weights, another may put nearly half its weight in a handful of names. Start with the prospectus or the issuer's product page and check the index name, the number of holdings, the weight of the top holdings and how often the index rebalances. The general mechanics of indexes are covered in the article on what an index measures.
The fee is more than one line
The headline fee in comparison tables usually bundles management, distribution, custody and administration fees. On top of that come other expenses such as index licensing and audit costs, plus the trading costs the fund incurs when it buys and sells holdings. So a fund with a low headline fee can still cost more in practice. The broker commission and bid-ask spread you pay yourself are separate again. Look for disclosures that add these other costs to the headline figure.
- Headline fee: management, distribution, custody and admin
- Other expenses: index licensing, audit and similar
- Trading costs: what the fund pays to rebalance
- Your own costs: commission and the bid-ask spread
Separate tracking difference from tracking error
An index fund never moves exactly like its index. The gap between the fund's return and the index return over a period is the tracking difference; how erratic that gap was from day to day is the tracking error. Tracking difference usually widens slowly because costs come out steadily, while a large tracking error means the fund can drift away from the index over short periods. Issuers publish both, so comparing past actual figures alongside the fee gives a truer picture.
Holding the assets or tracking by contract
Many ETFs buy the index constituents directly, either all of them or a representative sample. Others are synthetic: they sign a contract with a counterparty, often a bank or broker, which promises to pay the index return. Synthetic funds make it easier to follow assets that are hard to buy directly, but they add the risk that the counterparty fails to pay. In some markets synthetic funds must say so in their names, so read the name together with the prospectus.
Liquidity has two layers
An ETF with thin volume looks hard to trade, but listed funds have liquidity providers who are required to post bids and offers within set limits. What matters more is how easily the underlying assets trade. Spreads still tend to widen right after the open, just before the close, and for funds holding foreign assets while those foreign markets are shut. Placing a market order when the spread is wide can fill you well away from the fund's net asset value, so a limit order, where you set the price, helps narrow that gap.
What happens when a fund is small
A fund with few assets carries relatively heavy fixed costs and can fall below the exchange's listing requirements and be delisted. Delisting usually means holders are paid out at the net asset value at that point, so it is not a total loss, but you no longer choose when your gain or loss is locked in. When several similar funds exist, add assets under management and time since listing to your comparison. The exact delisting rules are in the exchange's official guidance.
Distributions, currency hedging and tax
Funds tracking the same index may pay distributions in cash or reinvest them inside the fund. For funds holding foreign assets, results also depend on whether currency risk is hedged, which is often flagged in the fund name. Tax treatment differs between domestically listed and foreign-listed funds and between equity funds and other types. Rates and rules change, so check the latest guidance from your tax authority and broker.
- Distributing versus accumulating
- Whether currency is hedged, and what it costs
- Different tax treatment by listing venue
- Confirm tax rules from official sources
A checking order and common mistakes
Having a fixed order keeps you from being pulled along by a catchy name or recent returns. Common mistakes are choosing on one or two years of performance, comparing only the headline fee, and holding leveraged or inverse funds for long periods as if they were plain index funds. The order below is simply a way to check structure; this article is not investment advice and recommends no product.
- The index and the weight of top holdings
- The headline fee and other costs
- Past tracking difference and tracking error
- Replication method, fund size and spreads
- Distribution policy, hedging and tax
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