Vanguard Mid-Cap ETF (VO): Complete Beginner's Guide
Last updated: March 2026 • Vanguard • US Mid-Cap
Expense Ratio
0.04%
AUM
$65.0B
Dividend Yield
1.50%
Inception
2004
Beginner Score
8.5/10
What is Vanguard Mid-Cap ETF?
VO tracks the CRSP US Mid Cap Index, giving investors access to medium-sized U.S. companies that sit between large-cap stability and small-cap growth potential. These mid-cap companies are often past their riskiest early stages yet still have significant room to grow. The fund offers a well-diversified basket of mid-sized firms across every major sector of the economy.
VO is managed by Vanguard and has been available since 2004. With $65.0B in assets under management, it's a well-established fund with strong institutional backing. The fund charges an expense ratio of 0.04%, which means for every $10,000 you invest, you pay approximately $4 per year in management fees.
VO at a Glance — Key Metrics
| Expense Ratio | 0.04% |
| Total Holdings | 325 |
| P/E Ratio | 22.5 |
| Beta | 1.05 |
| Dividend Yield | 1.50% |
| AUM | $65.0B |
| Inception Year | 2004 |
| Issuer | Vanguard |
Top 10 Holdings in VO
VO holds 325 different securities. Here are the largest positions that make up the core of this fund:
| # | Company | Ticker | Weight |
|---|---|---|---|
| 1 | IDEXX Laboratories | IDXX | 1.20% |
| 2 | Microchip Technology | MCHP | 1.10% |
| 3 | Amphenol | APH | 1.10% |
| 4 | Arthur J. Gallagher | AJG | 1.00% |
| 5 | Copart | CPRT | 1.00% |
| 6 | Mettler-Toledo | MTD | 0.90% |
| 7 | Fastenal | FAST | 0.90% |
| 8 | CDW Corporation | CDW | 0.80% |
| 9 | Old Dominion Freight | ODFL | 0.80% |
| 10 | West Pharmaceutical | WST | 0.80% |
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VO Performance History
Here's how VO has performed over different time periods. Remember that past performance doesn't guarantee future results, but it gives you a sense of the fund's track record:
YTD
2.80%
1 Year
14.00%
3 Year
8.00%
5 Year
11.00%
10 Year
10.00%
Beginner Suitability Score: 8.5/10
Our proprietary Beginner Suitability Score evaluates ETFs based on five factors that matter most to new investors: fees, volatility, diversification, dividend history, and track record length.
VO scores 8.5/10 because it has very low fees, can be more volatile than the broader market, offers broad diversification across 325 holdings, and has been available since 2004, giving it a proven track record.
How to Buy VO — Step by Step
- Open a brokerage account — We recommend Fidelity, Charles Schwab, or Vanguard for ETF investing. All offer $0 commissions on ETF trades.
- Fund your account — Transfer money from your bank. You can start with as little as $1 if your broker offers fractional shares.
- Search for "VO" — Use the search bar in your brokerage platform to find Vanguard Mid-Cap ETF.
- Place your order — Choose "Market Order" for simplicity or "Limit Order" if you want to set a specific price. Enter how many shares (or dollar amount) you want to buy.
- Set up automatic investing — Most brokers let you schedule recurring purchases (e.g., $100/month on the 1st). This is dollar cost averaging in action.
Dollar Cost Averaging Into VO
Here's what consistent monthly investing could look like over time, assuming an average annual return of 8% (approximate historical stock market average):
| Monthly | 10 Years | 20 Years | 30 Years |
|---|---|---|---|
| $100/mo | $18,417 | $59,295 | $150,030 |
| $250/mo | $46,041 | $148,237 | $375,074 |
| $500/mo | $92,083 | $296,474 | $750,148 |
*Projections assume 8% average annual return with monthly compounding. Actual returns will vary. Past performance doesn't guarantee future results.
Fee impact: With VO's expense ratio of 0.04%, a $10,000 investment would lose approximately $344 to fees over 20 years compared to a zero-fee investment. This is a reasonable fee level for the value provided.
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Pros and Cons of VO
Pros
- ✓Sweet spot between large-cap stability and small-cap growth potential
- ✓Very low expense ratio makes it one of the cheapest mid-cap options
- ✓Excellent sector diversification reduces concentration risk
- ✓Mid-cap stocks historically offer attractive risk-adjusted returns over full market cycles
Cons
- ✗More volatile than large-cap funds during market selloffs
- ✗Less media coverage and analyst attention than large-cap stocks can mean slower price discovery
- ✗Holdings rotate frequently as companies grow into large-cap or shrink into small-cap
VO vs Similar ETFs
See how VO stacks up against similar funds:
Frequently Asked Questions
Is VO a good ETF for beginners?▾
VO has a Beginner Suitability Score of 8.5/10 on our scale. This makes it a strong choice for new investors due to its low fees and broad diversification.
What is the expense ratio of VO?▾
VO has an expense ratio of 0.04%. This means for every $10,000 you invest, you pay approximately $4 per year in fees. This is considered very low and cost-efficient.
How much money do I need to invest in VO?▾
You can invest in VO with as little as $1 through brokers that offer fractional shares (like Fidelity, Schwab, or Robinhood). There is no minimum investment required beyond the share price itself, which changes daily. Dollar cost averaging — investing a fixed amount regularly — is a popular strategy.
Does VO pay dividends?▾
Yes, VO pays dividends with a current yield of approximately 1.50%. Dividends are typically paid quarterly and can be reinvested automatically through most brokers.
What are the top holdings in VO?▾
The top holdings in VO include IDEXX Laboratories (1.20%), Microchip Technology (1.10%), Amphenol (1.10%), and more. The fund holds 325 total positions, providing broad diversification across many companies.