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ETF vs. Index Fund vs. Mutual Fund: What’s the Difference?

June 12, 2017

  • ETFs can help you diversify your portfolio.
  • ETFs tend to have lower costs than mutual funds.
  • An ETF owns a basket of securities of different kinds of companies, industrial sectors, or geographies.


3 min read

Exchange-traded funds (ETFs), mutual funds, index funds. What’s the difference?

All three investments pool stocks and bonds or other holdings into a single fund. So, for example, instead of owning $100 worth of just Amazon or Microsoft stock individually, you’d own $100 worth of shares in numerous technology companies.

But mutual funds and ETFs work in a slightly different way.

Here’s a quick explainer:

Exchange-traded funds (ETFs)

ETFs are investment funds that are traded on an exchange, such as the New York Stock Exchange (NYSE) or NASDAQ.

You don’t own the stocks held by an ETF directly, instead you own shares of the fund, which in turn owns securities of different companies

ETFs often correspond to a particular size of company, industrial sector, market, or even social goal. So, you could own shares in an ETF that owns blue chip stocks of large companies, or the stocks of less well-known, smaller companies.

You could also purchase shares of ETFs that specialize in emerging markets, commodities, or consumer products, to name a few different options. An ETF might also invest in companies that are helping the environment or working to increase fair labor practices overseas.

Good to know:

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Mutual funds

Like an ETF, a mutual fund is also a basket of stocks that focuses on a sector, geography, or company size, among other things.

You own shares in a mutual fund as well, but the share price is calculated at the end of the day. By contrast, ETFs have share prices that fluctuate throughout the day, and they can be bought and sold throughout the day like individual stocks.

Good to know:

Index funds

ETFs and mutual funds can also be index funds.

These funds follow specific indexes, such as the Dow Jones Industrial Average, which reflects the stock prices of some of the 30 largest publicly traded companies in the U.S., or the NASDAQ, where most technology stocks are traded–think Amazon and Facebook.

Good to know:

Tax differences

Generally speaking, the overall operations of an ETF are more tax-efficient than mutual funds. It’s a little complicated, but both ETF and mutual fund managers buy and sell shares of companies on a regular basis, depending on a host of factors, such as company performance.

Due to the way ETFs are structured, they sell shares in a manner that triggers fewer taxes.

Funds and diversification

When it comes to investing, you never want to put all your eggs in one basket. Funds can help you diversify. A diverse portfolio has a variety of stocks, bonds, or other holdings.

The theory is that diversification can reduce your financial risk. That’s because the value of any single stock or bond can increase or decrease suddenly, depending on what’s going on in the markets, or the broader economy.

If that single stock drops precipitously, the value of your investment can be wiped out. A basket of stocks, potentially, won’t be subject to swings in value that are as big.

By Jeremy Quittner
Jeremy Quittner is the senior writer for Stash.

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