IOO vs IVV
iShares Global 100 ETF vs iShares Core S&P 500 ETF
Quick Verdict
IVV has a lower expense ratio. IOO delivered stronger 1-year returns. IVV offers more diversification with 505 holdings.
Side-by-Side Comparison
| Metric | IOO | IVV | Winner |
|---|---|---|---|
| Expense Ratio | 0.40% | 0.03% | |
| AUM | $8.7B | $865.2B | |
| Dividend Yield | 0.85% | 1.09% | |
| Holdings | 117 | 508 | |
| YTD Return | +15.21% | +14.50% | |
| 1Y Return | +28.33% | +22.02% | |
| 3Y Return (annualized) | +25.62% | +21.80% | |
| 5Y Return (annualized) | +16.03% | +13.37% | |
| Volatility (annualized) | 15.8% | 15.1% | |
| Max Drawdown | -57.9% | -56.5% | |
| Fund Family | iShares by BlackRock (US) | iShares by BlackRock (US) | |
| Category | Equity | Equity | |
| Inception | Dec 5, 2000 | May 15, 2000 |
IOO vs IVV Performance
iShares Global 100 ETF (IOO) is a ETF from iShares by BlackRock (US) and iShares Core S&P 500 ETF (IVV) is a ETF from iShares by BlackRock (US). Over the past year IOO returned +28.33% while IVV returned +22.02%. Year to date, IOO is up 15.21% versus a gain of 14.50% for IVV.
Over three years, IOO compounded at +25.62% per year against +21.80% for IVV; over five years the annualized figures are +16.03% and +13.37% respectively. Across the full 26-year window we track, IVV has the edge at +7.07% annualized vs +5.88%. Past performance does not guarantee future results.
Risk: Volatility and Drawdowns
IOO has been the more volatile fund, with annualized monthly volatility of 15.8% compared with 15.1% for IVV. 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 -57.9% for IOO and -56.5% for IVV. Drawdown depth is worth weighing if you expect to sell during market stress rather than ride it out.
The two funds' monthly returns correlate at 0.96. They move almost in lockstep, so holding both mostly duplicates the same exposure.
Fees and Cost Over Time
IOO charges 0.40% per year while IVV charges 0.03%. On a $10,000 position that is $40 vs $3 annually, a gap of $37 per year that compounds over a long holding period. On income, IOO currently yields 0.85% against 1.09% for IVV.
Holdings Overlap
IOO and IVV share 54 holdings out of 553 unique holdings combined, representing a 49.7% weight overlap.
Moderate overlap means holding both could provide meaningful diversification benefits.
Frequently Asked Questions
Which is cheaper, IOO or IVV?
IOO has an expense ratio of 0.40% while IVV charges 0.03%. IVV is the cheaper option. On a $10,000 investment, that is $37 per year of difference.
Which performed better, IOO or IVV?
Over the past year IOO returned +28.33% vs +22.02% for IVV, so IOO leads on 1-year performance. Over the longest common window we track (26 years), IOO annualized +5.88% vs +7.07% for IVV. Past performance does not guarantee future results.
Which is riskier, IOO or IVV?
IOO has been the more volatile fund at 15.8% annualized versus 15.1% for IVV. Worst drawdown: IOO -57.9% vs IVV -56.5%.
Should I hold both IOO and IVV?
IOO and IVV have a monthly-return correlation of 0.96, so they move almost identically. Holding both adds little diversification - most investors pick one, usually on fees or the specific index tracked.
What is the holdings overlap between IOO and IVV?
IOO and IVV share 54 common holdings with a 49.7% weight overlap. Combined, they hold 553 unique securities.
Which pays a higher dividend, IOO or IVV?
IOO yields 0.85% while IVV yields 1.09%, so IVV currently pays the higher dividend yield.
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