How to Read an ETF: Holdings, Costs and Risks Before You Buy

Two ETFs with "World" in their names can hold different things, cost different amounts, trade in different currencies and treat dividends differently. All of that is published on the issuer's page for each fund, but it is spread across dozens of fields and several documents. This article walks through one such page, field by field, using a dated example: what each key number means, where to check it and what it does not tell you. It is not a list of "best ETFs" and not a suggestion to buy any particular fund.

What You Should Already Know

An ETF (exchange-traded fund) is a fund whose shares trade on a stock exchange like ordinary shares. Most ETFs track an index, meaning they hold a basket of securities chosen by published rules. If you want the broader picture first, see the overview of types of investment assets, the short glossary definition of an ETF, and the explainer on how market indices work.

This article assumes you know the definition. The question here is different: how do you find out exactly what you would own if you bought one share of a specific fund?

Where the Primary Information Lives

The primary source is the website of the company that runs the fund (the issuer). Comparison sites, rankings and broker pages are convenient, but they copy issuer data with a delay and often without dates. A typical fund page offers:

• Key facts: ISIN, benchmark index, costs, domicile, distribution policy, launch date, fund size.
• Factsheet: a two- to four-page PDF summary as of a month-end, with the fund's performance next to its index, top holdings, sector and country breakdowns, and exchange listings.
• Full holdings: every position in the fund, often as a downloadable file.
• KID or KIID: the standardised document for retail investors in the EU and the UK, covering objective, risks and costs.
• Prospectus and annual report: the legal documents with the fund's full rules.

The rule that matters most: every number has its own date, and different documents use different dates. A factsheet may show holdings at the end of last month while the holdings file shows yesterday. When you compare funds, write down the date next to each number.

The Example We Will Read

As the example we use the page of the iShares Core MSCI World UCITS ETF, USD (Accumulating) share class, on the iShares UK website, checked on 20 October 2026. It was chosen only because it is a large, well-documented fund in the European UCITS format; it is not a recommendation. The figures below will change, so look at the issuer's page again before any decision.

The sections below go through what follows from these fields, and what they leave out.

Identifying the Fund: Name, ISIN, Ticker and Exchange

Start by making sure you are looking at the exact fund and share class you intend to buy.

A fund's name is not unique. One issuer can run several funds on similar indices, and one fund can have several share classes. Besides USD (Accumulating), the example page lists USD (Distributing), EUR Hedged (Distributing) and GBP Hedged (Distributing). These are different share classes with different ISINs, different distribution policies and different currency hedging.

The ISIN is the international securities identifier. It pins down the share class but not the exchange: the same ISIN trades in several places.

The ticker is the short exchange code, and it is the easiest thing to get wrong. According to the listings table on the page (20 October 2026), this one share class trades:

• on the London Stock Exchange as SWDA in pounds and as IWDA in US dollars;
• on Euronext Amsterdam as IWDA and on Deutsche Börse Xetra as EUNL, both in euros;
• on Borsa Italiana as SWDA in euros and on SIX Swiss Exchange as SWDA in US dollars.

So the ticker SWDA stands for three different trading currencies on three exchanges, and the fund has several tickers. Only the combination of ISIN, exchange and trading currency identifies the line you are actually buying.

The Index and How the Fund Tracks It

The Benchmark Index field tells you which basket the fund is trying to copy. Everything else follows from it: which countries, sectors and companies end up in the fund and in what proportions. Read the index rules first and the fund name second. In the example, the index is the MSCI World Index (Net). The issuer describes the exposure as companies in 23 developed countries, covering about 85% of the listed equities in each. "Net" refers to the index version that reinvests dividends after withholding taxes on them, and that is the version the fund measures itself against.

Note what the index leaves out: emerging-market shares, bonds and most small companies. A fund with "World" in its name may cover only part of the world's stock market.

The Product Structure field tells you how the fund tracks the index:

• Physical replication: the fund actually buys the shares in the index. It can be full (every constituent at its exact weight) or optimised (sampling), where the fund holds a subset designed to behave almost like the index.
• Synthetic replication: the fund receives the index return through a swap agreement with a bank. The fund's own holdings may then look nothing like the index, and counterparty risk is added.

The example says Physical and Optimised: the fund buys real shares but not necessarily every index constituent at its exact weight. The page also has a section on securities lending, where the fund lends some of its shares to other market participants against collateral and earns a fee. According to the page, in the year to 30 June 2026 an average of 8.08% of the fund's assets was on loan, and the lending added 0.02% to the fund's return. That is extra income, but also extra risk: a borrower can fail to return the shares while the collateral loses value.

Not every ETF tracks an index at all. Actively managed ETFs exist, where a manager picks the holdings. The fund's Investment Objective states which kind it is.

Holdings and Concentration: What You Are Actually Buying

"1,250 holdings" sounds like broad diversification, but in a market-cap-weighted index the weights are very uneven. According to the fund's holdings file as of 16 October 2026:

• the ten largest positions made up 27.26% of the fund (Apple 5.55%, NVIDIA 5.42%, Microsoft 4.11%, then Amazon, two share classes of Alphabet, Meta, Broadcom, Tesla and Eli Lilly);
• companies located in the United States made up about 73% (our total of the Location column in the same file);
• the page shows information technology as the largest sector, at 30.33% as of 19 October 2026.

For comparison, the factsheet as of 30 September 2026 put the top ten at 27.78%, with the leading positions in a different order. That is not an error, just a reminder about dates: holdings shift every day with prices.

The practical consequence: if you already own an S&P 500 fund and add an MSCI World fund, you are largely buying the same US companies a second time. Look at the top holdings of all your funds together and see how much they overlap. Concentration risk and why spreading money across different assets matters are covered in Risk and Return, and briefly in the glossary entry on diversification.

Fund Costs, Spread and Broker Fees Are Different Things

"Fees" in ETF conversations can mean at least four different things, and each needs to be counted separately.

TER and ongoing charges

The TER (total expense ratio), or OCF (ongoing charges figure), is the yearly cost of running the fund as a percentage of its assets. It never appears as a separate line on your statement: it is deducted from the fund's value a little every day, which makes it easy to overlook. In the example the TER is 0.20% a year.

What the TER leaves out: the fund's own trading costs inside the portfolio, taxes the fund pays on the dividends it receives, your bid-ask spread and your broker's fees. Treat the TER as the floor of your costs, not the total.

Tracking difference

A better guide to what a fund really costs is not the TER but the tracking difference: the gap between the fund's return and its index's return over the same period. The example factsheet (performance as of 30 September 2026) shows them year by year:

In these years the fund came out slightly ahead of its index despite its 0.20% TER. The page itself does not explain why. Possible contributors include securities lending income and the fund paying different taxes on dividends than the Net index assumes. The lesson is not that the fund "beats the market" but that the TER alone does not show the actual result. Tracking difference can be negative too, it varies from year to year, and a past difference does not promise a future one.

One more detail: these figures are calculated on NAV, the net asset value per share. Your own result is based on the market prices you bought and sold at, in your currency, after your own costs.

Spread and the price versus NAV

On an exchange there are two prices: the highest price buyers are willing to pay (bid) and the lowest price sellers will accept (ask). The gap between them is the spread. When you trade at market, you buy at the ask and sell at the bid, so you give up part of the spread on every trade.

An illustrative example, not this fund's data: if the bid is 99.90 and the ask is 100.10, the spread is 0.20 on a price of about 100, or 0.2% for one full round trip of buying and selling. For a large fund on a liquid exchange during trading hours the spread is usually much smaller; for a small fund, on a thinly traded exchange or near the open and close, it is wider. The glossary entry on liquidity explains why.

The market price of a share can also drift slightly above NAV (a premium) or below it (a discount). The issuer of our example warns that investors may pay more than NAV when buying and receive less than NAV when selling. For broad funds holding liquid shares the gap is usually small; for funds holding hard-to-trade assets it can be noticeable.

Broker fees and currency conversion

These are costs of your account, not of the fund: dealing commissions, account fees, and the exchange rate and fee for converting currency. For small regular purchases, a fixed broker fee can weigh more than the TER.

To see how even a small difference in yearly costs compounds over time, enter your own numbers in the fees drag calculator. An illustrative example: 10,000 in any currency invested for 20 years at an assumed 6% a year before costs grows to about 30,900 with 0.2% yearly costs and to about 26,500 with 1.0%. This illustrates the mechanics; it is not a forecast.

Currency: Three Fields Not to Confuse

An ETF page carries at least three different "currencies", and each means something else:

• Fund base currency (USD in the example): the currency the fund keeps its books and calculates NAV in.
• Trading currency: the currency you pay on a particular exchange (the example fund trades in pounds, dollars and euros).
• Currency of the underlying assets: what the fund's holdings are priced in. In the holdings file as of 16 October 2026, about 73% of the weight was in US-dollar positions, about 8% in euros and about 6% in yen.

Buying the fund in euros does not make it a euro investment. If the dollar falls against the euro, the euro price of the share falls with it. Only hedged share classes (with "Hedged" in the name) reduce this effect, using derivatives, and they have their own costs and do not remove the risk entirely. If you measure your results in yet another currency, its exchange rate adds another layer. That is part of the investment's risk, not a reporting error.

Distribution Policy and Domicile

Use of Income tells you what the fund does with the dividends it receives:

• Accumulating (Acc): dividends stay in the fund and are reinvested; nothing is paid to your account, and the income shows up as a higher share price.
• Distributing (Dist): the fund pays dividends out to shareholders at regular intervals.

This does not make the fund's total return better or worse. What changes is when and in what form you receive the income, and therefore how and when it may be taxed. If you need a regular cash flow, a distributing class makes it visible. If you do not, an accumulating class saves you from reinvesting payouts yourself.

Domicile is the country where the fund is registered. It decides which rules the fund follows, which documents it must publish and how the dividends flowing into the fund are taxed. In the example the domicile is Ireland and the format is UCITS, the EU standard for funds sold to retail investors. A fund on the same index registered in, say, the United States works under different rules and may not be available to some investors at all.

What to Check Separately: Access, Taxes and Your Own Horizon

The fund page does not answer several questions that matter as much as the TER.

• Access. Whether your broker can buy this exact share class on the exchange you want for a client in your country of residence depends on the broker and on local regulation; the issuer's page does not settle it.
• Taxes. How distributions and sales are taxed depends on where you are tax resident, on the current rules there and on the fund's domicile. Check them against official sources at the time you trade, not against forum advice.
• Your horizon. A broad equity fund can fall by tens of percent in a year: the example fund lost 18.03% in 2022. Money you may need soon belongs somewhere other than an equity fund.

If you keep your financial plan in Krokfolio, a fund is one item of the "Funds & ETFs" type, and it makes sense to enter its expected total return after the fund's costs.

Frequently Asked Questions

Do all ETFs track an index?

No. Most ETFs are index funds, but actively managed ETFs exist, where a manager chooses the holdings. Index funds also track their index in different ways: fully, through sampling (Optimised) or synthetically through swaps. The fund's objective and the Product Structure field tell you which.

Why doesn't a low fee make a fund right for everyone?

The TER is the price, not the contents. A cheap fund can follow an index you did not want, hold a narrow set of companies, trade in the wrong currency for you, pay out income you would rather reinvest, or be unavailable through your broker. And the actual result depends on tracking difference, spread and account costs, not on the TER alone.

Why isn't a ticker enough to identify a fund?

The same ticker can be used on different exchanges in different currencies, and one fund can have several tickers. In the example, SWDA trades in London in pounds, in Milan in euros and in Zurich in US dollars. A share class is identified by its ISIN together with the exchange and the trading currency.

Summary

Read an ETF page in this order: identification first (ISIN, share class, exchange, trading currency), then the index and replication method, then holdings and concentration, costs (TER, tracking difference, spread, account fees), the currency of the assets, distribution policy and domicile. Write down every number with its date and source, because each document uses its own date. No single field makes a fund "good" or "bad"; what decides is whether its holdings, currency and risk fit your goal and your horizon. A useful first step is to compare the effect of costs on your own numbers in the fees drag calculator.