Vanguard Index Funds: A Complete Overview
Vanguard didn't just sell the first index fund — its unusual ownership structure is the reason its fees keep falling. Here's the lineup and why the company is built the way it is.
Don't have time? Here's what you need to know:
- 1Vanguard is owned by its own funds and their investors, so it returns scale savings as lower fees — that's the source of its ~0.03% costs.
- 2Jack Bogle founded Vanguard and launched the first index fund there in 1976.
- 3Core funds come as twin share classes — VTSAX/VTI, VFIAX/VOO, VTIAX/VXUS, VBTLX/BND — tracking the same index in mutual-fund and ETF form.
- 4Vanguard ETFs trade commission-free at most brokerages, so you don't need a Vanguard account to own them.
The Ownership Structure That Drives the Low Fees
Vanguard's low costs are not a marketing gimmick — they are baked into how the company is owned. Most fund companies are owned by outside shareholders or a parent corporation that expects profits. Vanguard is owned by its own funds, which are in turn owned by the investors in them. There is no outside owner demanding a profit margin, so as the funds grow, Vanguard repeatedly passes the savings back to investors as lower fees.
This is why Vanguard has spent decades cutting expense ratios rather than maximizing them. Jack Bogle designed it this way deliberately when he founded the company and launched the first index fund in 1976. The structure aligns the company's incentives with yours in a way that is genuinely unusual in finance, and it is the backdrop to everything else in the lineup.
The Core Vanguard Index Funds
Vanguard's index lineup is built around a few workhorse funds. For the total U.S. market there is VTSAX (the mutual fund) and VTI (the ETF), holding several thousand U.S. companies. For the S&P 500 specifically there is VFIAX and VOO. For international exposure there is VTIAX and VXUS, and for bonds VBTLX and BND. Each fund exists in both a mutual-fund and an ETF share class, tracking the same index at nearly the same cost.
These funds are the backbone of the popular three-fund portfolio and of Vanguard's own target-date funds. The expense ratios sit around 0.03% to 0.04% for the U.S. equity funds, a level that was almost unimaginable a generation ago. For most investors, a combination of two or three of these funds is all the U.S., international, and bond exposure they will ever need.
| Exposure | Mutual fund | ETF | Approx. expense ratio |
|---|---|---|---|
| Total U.S. market | VTSAX | VTI | ~0.03% |
| S&P 500 | VFIAX | VOO | ~0.03%-0.04% |
| Total international | VTIAX | VXUS | ~0.05%-0.08% |
| Total U.S. bond market | VBTLX | BND | ~0.03% |
Is Vanguard Right for You?
Vanguard's strength is its index lineup and its low-cost culture, and for a buy-and-hold index investor that is most of what matters. Its weaknesses are around the edges: the website and app have historically felt dated compared with newer brokers, and customer service can be slower. None of that affects the funds themselves, which are excellent.
It is also worth remembering that Vanguard funds are not exclusive to Vanguard. You can buy VTI, VOO, and VXUS commission-free at virtually any major brokerage, so you do not need a Vanguard account to own Vanguard ETFs. Fidelity and Schwab offer comparably cheap index funds of their own, so the right answer is often whichever low-cost provider you already use — the differences between the three are small.
Frequently Asked Questions
Why are Vanguard's index funds so cheap?
Because of its ownership structure. Vanguard is owned by its funds, which are owned by their investors, so there's no outside shareholder demanding profit. As assets grow, Vanguard returns the savings to investors as lower fees rather than booking them as profit. That's why its expense ratios have steadily fallen to around 0.03%-0.04% on its core U.S. equity funds.
What's the difference between VTSAX and VTI?
They're two share classes of the same fund and hold an identical portfolio of the total U.S. stock market. VTSAX is the mutual fund; VTI is the ETF. Choose VTI for intraday trading, fractional shares, and slightly better taxable-account efficiency; choose VTSAX for automatic dollar-amount investing within Vanguard. The costs are essentially the same.
Do I need a Vanguard account to buy Vanguard funds?
Not for the ETFs. VTI, VOO, VXUS and BND trade commission-free at nearly every major brokerage, so you can own them through Fidelity, Schwab, or others. You'd typically need a Vanguard account to buy the Admiral-class mutual funds like VTSAX, but the ETF equivalents are available everywhere.
Is Vanguard better than Fidelity or Schwab for index funds?
All three offer excellent, ultra-low-cost index funds, and the differences are small. Vanguard pioneered indexing and has a strong low-cost culture; Fidelity offers some zero-expense-ratio index mutual funds; Schwab has very cheap funds and a polished platform. For most investors, the best choice is whichever low-cost provider you already use, rather than chasing a tiny fee difference.
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.