VOO is the ticker symbol for the Vanguard S&P 500 ETF, one of the most popular investment funds in the world. It holds shares of roughly 500 of the largest publicly traded companies in the United States, giving you broad exposure to the American stock market through a single purchase. If you buy one share of VOO, you instantly own a small slice of Apple, NVIDIA, Microsoft, Amazon, and hundreds of other major companies.
How VOO Works
VOO is an exchange-traded fund, or ETF, which means it trades on the stock market just like an individual stock. You can buy or sell shares of VOO anytime the market is open through any brokerage account. Behind the scenes, the fund is designed to mirror the S&P 500 index, a widely followed benchmark that tracks 500 large U.S. companies selected by S&P Global based on market size, profitability, and trading volume.
Rather than trying to beat the market by picking individual winners, VOO simply owns what the index owns, in the same proportions. This is called passive or index investing. When the S&P 500 goes up 10%, VOO goes up roughly 10%. When the index drops, VOO drops by the same amount. The goal is to match the market’s return, not outperform it.
What’s Inside the Fund
VOO holds stocks across all major sectors of the economy, but it’s weighted by market capitalization. That means the biggest companies make up the largest share of the fund. As of March 2026, information technology dominates at 32.9% of the portfolio, followed by financials at 12.6%, communication services at 10.3%, consumer discretionary at 9.9%, and health care at 9.5%. Smaller slices go to industrials, energy, utilities, materials, and real estate.
The top individual holdings reflect the concentration of today’s tech giants:
- NVIDIA: 7.58%
- Apple: 6.66%
- Microsoft: 4.92%
- Amazon: 3.64%
- Alphabet (Google), Class A: 2.99%
- Broadcom: 2.62%
- Alphabet (Google), Class C: 2.40%
- Meta (Facebook): 2.24%
Those eight companies alone account for roughly a third of the entire fund. That’s worth knowing: while VOO gives you broad diversification across 500 names, its performance is heavily influenced by a handful of large technology companies. If tech stocks have a bad year, VOO will feel it more than you might expect from a 500-stock fund.
Costs and Fees
VOO charges an expense ratio of 0.03%, which is one of the lowest in the investment industry. That means for every $10,000 you have invested, you pay about $3 per year in fund management fees. There are no commissions to buy or sell at most major brokerages, and the fund’s trading spread (the tiny gap between the buy and sell price) rounds down to zero because VOO trades in such enormous volume.
Low costs matter more than most investors realize. Over decades of investing, even small differences in annual fees compound into meaningful differences in your final balance. A fund charging 0.50% instead of 0.03% would cost you thousands of extra dollars on a six-figure portfolio over a 30-year period.
Dividends
VOO pays dividends quarterly. Many of the companies in the S&P 500 distribute a portion of their profits to shareholders, and VOO passes those payments along to you. The fund’s recent dividend yield sits around 1.09%, so a $10,000 investment would generate roughly $109 per year in dividend income. You can choose to have those dividends deposited as cash or automatically reinvested to buy more shares, depending on your brokerage settings.
VOO, SPY, and IVV: What’s Different
VOO is not the only S&P 500 ETF. Two major competitors track the exact same index: SPY (the SPDR S&P 500 ETF from State Street) and IVV (the iShares Core S&P 500 ETF from BlackRock). All three hold the same stocks in nearly identical proportions, so their returns are virtually the same day to day.
The practical difference comes down to cost. VOO and IVV both charge 0.03% in annual expenses. SPY charges 0.0945%, roughly three times as much. SPY remains popular with large institutional traders because it has about 10 times the daily trading volume of the other two, which matters when you’re moving millions of dollars at once. For individual investors buying and holding, that extra liquidity isn’t worth the higher fee. VOO and IVV are functionally interchangeable for most people.
Who VOO Is Suited For
VOO is often the first fund people buy when they start investing, and many experienced investors keep it as the core of their portfolio for life. It works well if you want exposure to the broad U.S. stock market without researching individual companies or paying high management fees. It’s commonly held in retirement accounts like IRAs and 401(k)s, as well as taxable brokerage accounts.
Because VOO holds only large U.S. companies, it doesn’t cover everything. It excludes small and mid-sized companies, international stocks, and bonds. Some investors pair VOO with separate funds covering those areas for more complete diversification. Others are comfortable with the concentration, since the S&P 500 has historically represented a large share of global stock market value.
How to Buy VOO
You can purchase VOO through any brokerage account that offers stock and ETF trading. Open an account, deposit funds, search for the ticker “VOO,” and place a buy order. There’s no minimum investment beyond the price of a single share, and many brokerages now offer fractional shares, letting you invest any dollar amount even if you can’t afford a full share. The entire process can be done online in minutes.