IEZ vs VOO
iShares US Oil Equipment & Services ETF vs Vanguard S&P 500 ETF
Which is better, IEZ or VOO?
All Cap Blend against Large Cap Blend.
VOO has a lower expense ratio. IEZ led over 1Y and 5Y, VOO over 3Y and the full window. VOO is less concentrated, with 36.4% of the fund in its ten largest positions against 74.0%.
MarketXLS is not an investment adviser. This comparison is generated automatically from market data and is for information only. A Best mark means the better reading on that one measure, not a recommendation to buy.
Side-by-Side Comparison
| Metric | IEZ | VOO |
|---|---|---|
| Expense Ratio | 0.37% | 0.03%Best |
| AUM | $391M | $997.4B |
| Dividend Yield | 1.12% | 1.04% |
| Holdings | 35 | 509 |
| YTD Return | +37.98%Best | +12.50% |
| 1Y Return | +56.45%Best | +17.58% |
| 3Y Return (annualized) | +7.12% | +21.27%Best |
| 5Y Return (annualized) | +18.95%Best | +12.95% |
| Volatility (annualized) | 38.5% | 14.1%Best |
| Max Drawdown | -93.3% | -34.3%Best |
| $10,000 over 5 years | $23,813Best | $18,384 |
| Top 10 Weight | 74.0% | 36.4%Best |
| Fund Family | iShares by BlackRock (US) | Vanguard (US) |
| Category | Equity | Equity |
| Style | All Cap Blend | Large Cap Blend |
| Inception | May 1, 2006 | Sep 7, 2010 |
Volatility and max drawdown are measured over the window both funds cover: Sep 9, 2010 to Sep 11, 2026 (16 years).
IEZ vs VOO growth
Month-end closes. Both lines start at 0% in the first month shown, so the gap between them is the difference in growth across that window. The full view covers the 16 years both funds cover.
IEZ vs VOO Performance
iShares US Oil Equipment & Services ETF (IEZ) is an ETF from iShares by BlackRock (US) and Vanguard S&P 500 ETF (VOO) is an ETF from Vanguard (US). Over the past year IEZ returned +56.45% while VOO returned +17.58%. Year to date, IEZ is up 37.98% versus a gain of 12.50% for VOO.
Over three years, IEZ compounded at +7.12% per year against +21.27% for VOO; over five years the annualized figures are +18.95% and +12.95% respectively. Across the full 16-year window we track, VOO has the edge at +13.41% annualized vs -1.59%.
Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
IEZ has been the more volatile fund, with annualized monthly volatility of 38.5% compared with 14.1% for VOO. Lower volatility generally means a smoother ride, though it often comes with lower long-run returns.
The deepest peak-to-trough decline in our data was -93.3% for IEZ and -34.3% for VOO. Drawdown depth is what each fund did in the worst stretch of the window measured above.
The two funds' monthly returns correlate at 0.61. They move together some of the time, and apart the rest.
Fees and Cost Over Time
IEZ charges 0.37% per year while VOO charges 0.03%. On a $10,000 position that is $37 vs $3 annually, a gap of $34 per year that compounds over a long holding period. On income, IEZ currently yields 1.12% against 1.04% for VOO.
Holdings Overlap
50.3% of IEZ's money is in holdings VOO also owns. 0.2% of VOO's money is in holdings IEZ also owns.
The two portfolios partly overlap.
The two holdings books were reported 62 days apart, IEZ as of Aug 31, 2026 and VOO as of Jun 30, 2026, so some of the difference between them is the time between the two reports rather than the funds.
3 positions in common, counted across the 32 positions we hold weights for in IEZ and 505 in VOO, against full books of 35 and 509.
What only one of them owns
Our book lists 494 positions for VOO that do not appear in our book for IEZ (99.2% of the fund), and 25 for IEZ that do not appear in VOO (36.8%).
Some of those will be the same company recorded under a different code in one of the two books, so the real difference in what you would own is no larger than this and may be smaller. We do not name the individual positions here for that reason.
50.3% of IEZ is already inside VOO.
You probably hold more than these two. Add the rest and see how much of the whole book is the same companies twice.
Free for up to 10 holdings. No account needed.
Frequently Asked Questions
Which is cheaper, IEZ or VOO?
IEZ has an expense ratio of 0.37% while VOO charges 0.03%. VOO is the cheaper option, by $34 a year on a $10,000 investment.
Which performed better, IEZ or VOO?
Over the past year IEZ returned +56.45% vs +17.58% for VOO, so IEZ leads on 1-year performance. Over the longest common window we track (16 years), IEZ annualized -1.59% vs +13.41% for VOO. Past performance does not guarantee future results. This is information, not a recommendation.
Which is riskier, IEZ or VOO?
IEZ has been the more volatile fund at 38.5% annualized versus 14.1% for VOO. Worst drawdown: IEZ -93.3% vs VOO -34.3%.
Should I hold both IEZ and VOO?
IEZ and VOO have a monthly-return correlation of 0.61, so their returns are far enough apart for the mix to behave differently from either one alone. This is information, not a recommendation.
What is the holdings overlap between IEZ and VOO?
50.3% of IEZ's money is in holdings VOO also owns. 0.2% of VOO's is in holdings IEZ also owns. They hold 3 positions in common, counted across the 32 positions we hold weights for in IEZ and 505 in VOO.
Which pays a higher dividend, IEZ or VOO?
IEZ yields 1.12% while VOO yields 1.04%, so IEZ currently pays the higher dividend yield.
Is VOO better than IEZ?
VOO has a lower expense ratio. IEZ led over 1Y and 5Y, VOO over 3Y and the full window. VOO is less concentrated, with 36.4% of the fund in its ten largest positions against 74.0%. Which one suits a particular account depends on what it is for. This is information, not a recommendation.