VOO is an exchange-traded fund, not a mutual fund

VOO (Vanguard S&P 500 ETF) is an exchange-traded fund, which means it trades on a stock exchange like a stock does, rather than being bought and sold through a fund company like a traditional mutual fund. Both VOO and mutual funds hold baskets of investments, but they work differently in how you buy them, when you can trade them, and what you pay to own them.

The confusion is understandable because VOO and many mutual funds track the same thing — in this case, the S&P 500 index of 500 large U.S. companies. Vanguard itself offers a mutual fund version of the same index called the Vanguard 500 Index Fund (ticker VFIAX), which holds nearly identical stocks. The difference is not what they own, but how they operate.

Key Takeaways

  • VOO trades on the stock exchange during market hours like a stock, while mutual funds are priced once per day after the market closes.
  • You can buy VOO through any brokerage account, but mutual funds are typically bought directly from the fund company or through a brokerage.
  • VOO has a lower expense ratio (0.03% annually) than most mutual funds tracking the same index, though Vanguard's mutual fund version (VFIAX) charges the same rate.
  • ETFs like VOO can be sold short or bought on margin, options not available with mutual funds.
  • Mutual funds require a minimum investment that varies by fund, while VOO requires only the price of one share.

How trading works: real-time versus once-per-day pricing

When you buy or sell VOO, you are trading it on the stock exchange during market hours (9:30 a.m. to 4 p.m. Eastern time on weekdays). The price changes throughout the day as buyers and sellers meet. You see the price in real time and can decide whether to buy at that moment or wait.

With a mutual fund, you place an order at any time of day, but the transaction happens after the market closes. The fund company calculates the net asset value (NAV) — the price per share — once, usually around 4 p.m. Eastern time. Everyone who bought that day pays the same price; everyone who sold receives the same price. You do not know the exact price until after you have submitted your order.

Expense ratios and what you pay annually

VOO charges 0.03% per year in expenses, meaning you pay $3 annually for every $10,000 you own. This is among the lowest costs available for any S&P 500 fund. Vanguard's mutual fund version (VFIAX) charges the same 0.03% annually.

Other mutual funds tracking the S&P 500 charge more. Fidelity's Spartan 500 Index Fund (FXAIX) also charges 0.03%, but many actively managed mutual funds charge 0.5% to 1% or higher. The expense ratio is deducted automatically from the fund's returns each year; you do not pay it separately.

Minimum investments and how much you need to start

VOO has no minimum investment. You can buy a single share at whatever the current price is — roughly $450 to $500 per share depending on the day. If you have $100, you can buy a fractional share through most brokerages.

Mutual funds often require a minimum initial investment, commonly $1,000 to $3,000, though some have no minimum. Vanguard's 500 Index Fund (VFIAX) has no minimum if you set up automatic monthly investments, but requires $1,000 for a single lump-sum purchase. This minimum varies by fund and by whether you are buying directly from the fund company or through a brokerage.

Tax treatment and capital gains distributions

Both VOO and mutual funds are taxable accounts when held outside a retirement account like an IRA or 401(k). Both distribute capital gains and dividends, which you owe taxes on in the year they are paid.

ETFs like VOO tend to be more tax-efficient than actively managed mutual funds because they trade less frequently and have a structural advantage in how they handle redemptions. However, index mutual funds like VFIAX are nearly as tax-efficient as ETFs. The difference matters most if you hold the fund in a taxable brokerage account and plan to hold it for many years.

Where you can buy VOO versus mutual funds

You can buy VOO through any brokerage — Fidelity, Charles Schwab, E*TRADE, Vanguard, or dozens of others. You place an order like you would for any stock, and it settles in two business days.

Mutual funds can be bought through a brokerage, but many people buy them directly from the fund company's website. Buying directly from Vanguard, Fidelity, or another fund company sometimes offers advantages like lower minimums or access to share classes not available elsewhere. Some mutual funds are only available through specific brokerages or financial advisors.

Advanced trading features available with ETFs

Because VOO trades like a stock, you can use trading strategies not available with mutual funds. You can sell short (betting the price will fall), buy on margin (borrowing money to buy more), or place limit orders (buying only if the price drops to a certain level). Most individual investors do not use these features, but they exist if you want them.

With a mutual fund, you can only buy or sell at the end-of-day price. You cannot short it, cannot use margin, and cannot place conditional orders.

Frequently Asked Questions

Can I hold VOO in a retirement account like an IRA?

Yes. VOO can be held in a traditional IRA, Roth IRA, SEP IRA, or any other retirement account that allows self-directed investing. You buy it the same way — through a brokerage — and the tax treatment depends on the account type, not on whether it is an ETF or mutual fund.

Is VOO better than a mutual fund that tracks the same index?

VOO and Vanguard's 500 Index Fund (VFIAX) charge the same expense ratio and hold nearly identical stocks. The choice depends on your situation: VOO works better if you want to buy a fractional share, trade during the day, or use advanced trading features. The mutual fund works better if you prefer once-per-day pricing or want to buy directly from Vanguard with no brokerage account. Neither is objectively better.

Do I pay a commission to buy VOO?

Most brokerages charge no commission to buy or sell VOO. Some brokerages may charge a small fee for fractional shares, but full shares are commission-free at major brokerages like Fidelity, Schwab, and Vanguard. Always check your brokerage's fee schedule before opening an account.

What happens to my VOO shares if the market crashes?

The value of your shares falls along with the market, just as it would with a mutual fund. You own a piece of 500 companies, and if those companies' stock prices drop, your investment drops. You do not lose the shares themselves unless you sell them at a loss.