Short answer
Mutual funds and ETFs both pool investors’ money, but they handle individual-share transactions differently. ETF investors trade on an exchange throughout the day at market prices rather than buying or redeeming individual shares directly with the fund. That trading distinction does not itself describe what the portfolio owns. 1 2
On this page
At a glance
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| Attribute | Mutual fund | Exchange-traded fund |
|---|---|---|
| Portfolio | Pooled investments | Pooled investments |
| Individual-share transactions | Direct fund transactions, contrasted with ETFs | Exchange trading, not direct retail redemption |
| Exchange pricing | Not the ETF trading model | Intraday market price; may differ from NAV |
| Covered structure | Open-end investment company | Open-end investment company or unit investment trust |
These distinctions concern the registered funds covered by the SEC bulletins. 1 2
What each thing is
Both are investment companies whose shares give investors proportionate ownership in a pooled portfolio and its gains or losses. The underlying investments may include stocks, bonds, or other assets. Professional management is a shared feature, not a defining advantage of one label over the other. 1
Key differences
An ETF has an exchange-market layer between the retail shareholder and the fund. Its trading price can be above its net asset value, called a premium, or below it, called a discount. ETF purchases and sales may also involve brokerage commissions and other trading costs beyond fund expenses. 2
How to tell them apart
A useful identification rule is to check whether individual shares trade on a national stock exchange throughout the day, then confirm the product’s structure and registration in its fund documents. The limit: a name containing “ETF” is not enough; some products using that label fall outside this registered-fund comparison. 1 2
Where they overlap
The holdings categories overlap: either fund type can pool money into stocks, bonds, other assets, or a mixture. Consequently, the trading label alone is not a portfolio description. The prospectus supplies the investment objective, principal strategies, and risks needed to understand the actual investment. 1 2
Edge cases
An ETF can be an open-end investment company, just as a mutual fund is; alternatively, it can be a unit investment trust. Thus, “open-end” alone does not separate the two. Exchange-traded notes and unregistered exchange-traded commodity funds are another boundary: they are not the ETFs covered here. 1
Why the distinction exists
The distinction matters because portfolio ownership and share trading are separate layers. An ETF investor encounters market pricing and a bid-ask spread—the gap between buyers’ bids and sellers’ asking prices—even while holding a professionally managed pooled investment. Similar underlying assets do not erase those transaction differences. 2
Common misconceptions
“ETF” does not mean the exchange price always equals portfolio value: premiums and discounts are possible. Nor does a fund’s name settle its strategy or registration category. The SEC points readers toward the prospectus rather than relying on the product label. 1 2
Examples
Hypothetical case 1: A mutual fund and an ETF both hold stocks and bonds. Their holdings categories overlap, but the ETF shares still trade on an exchange. Hypothetical case 2: An ETF share trades above its NAV. That is a market-price premium, not evidence that its underlying portfolio is worth the higher trading price. 1 2