What are index funds and ETFs?
Key facts
- Index funds and ETFs are passive; they track an index rather than trying to beat it.
- Their expense ratios are usually lower than actively managed funds.
- An ETF trades on the exchange like a share and needs a demat account; an index fund does not.
- Neither matches its index perfectly; the small gap is called tracking error.
Tracking, not beating
An index fund is a mutual fund with a modest ambition: rather than trying to beat the market, it simply holds the same securities as a market index, in the same proportions, so its return closely follows that index. Because there is little active decision-making, its expense ratio is usually lower than an actively managed fund.
An ETF, or exchange-traded fund, does the same tracking job but is structured to trade on the stock exchange like a share.
Index fund or ETF?
The practical difference is how you buy and sell. An index fund transacts at the day's NAV, like any mutual fund, with no demat account needed. An ETF trades through the day on the exchange, so it needs a demat account and a broker, and its price moves with the market during trading hours. Neither is inherently better; it depends on how you prefer to transact.
Two honest caveats
First, neither matches its index perfectly. The small gap, called tracking error, comes from costs, cash and timing, and a lower one is better. Second, and more important, passive does not mean low-risk. An index fund carries the full risk of the index it follows, so an equity index fund is as volatile as its market. The saving is in cost, not in risk.
If you are weighing passive against active for a goal, talk to us and we will lay out the trade-offs plainly.
Frequently asked questions
What is the difference between an index fund and an ETF?
Both track an index passively. An index fund is bought and sold at the day's NAV like any mutual fund. An ETF trades on the stock exchange through the day like a share, so it needs a demat account and a broker. The choice often comes down to how you prefer to transact.
What is tracking error?
Tracking error is the small gap between a fund's return and the index it follows, caused by costs, cash holdings and timing. No index fund or ETF matches its index exactly; a lower tracking error means the fund follows the index more closely.
Are index funds safer because they are passive?
No. Passive refers to strategy, not safety. An index fund carries the full risk of the index it tracks, so an equity index fund is just as volatile as that equity market. What passive investing tends to reduce is cost, not market risk.
This is general information, not a recommendation for your situation. If it would help to talk it through, we are happy to. Talk to Nico Wealth.
The information on this website is general and educational. It is not financial, tax, or legal advice, and not a recommendation for your situation. We try to keep it accurate and up to date, but it may contain errors or become outdated. Please verify important details from official sources, and consider your own circumstances, before acting.
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