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IOOvsOEFETF Comparison
iShares Global 100 ETF (IOO) belongs to the Global Large Cap segment. iShares S&P 100 ETF (OEF) is part of the US Large Cap segment. IOO's top 3 sector exposures are Information Technology, Communication Services and Health Care. In contrast, OEF's top sector exposures are Information Technology, Communication Services and Consumer Discretionary. IOO is more expensive with a Total Expense Ratio (TER) of 0.4%, versus 0.2% for OEF. IOO is down -0.81% year-to-date (YTD) with -$51M in YTD flows. OEF performs worse with -2.74% YTD performance, and +$217M in YTD flows. Run a side-by-side ETF comparison of IOO and OEF below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
IOO vs OEF performance and flow charts
Performance
Cumulative Flows
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IOO OEF | -2.52%-2.16% | -1.09%-3.22% | -0.81%-2.74% | +31.18%+24.47% | +99.06%+97.75% | +105.40%+97.67% |
| Flows | IOO OEF | -$12M+$318M | -$51M+$423M | -$51M+$217M | -$50M+$8.00B | +$1.00B+$12.82B | +$1.47B+$13.23B |
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IOO OEF | +13.30%+12.07% | +18.87%+19.22% | +15.60%+15.80% | +16.81%+17.64% |
| Max drawdown | IOO OEF | -4.58%-4.55% | -14.97%-14.24% | -19.16%-19.77% | -23.35%-26.44% |
| Max drawdown duration | IOO OEF | 43d76d | 45d45d | 107d126d | 554d696d |
IOO | OEF | |
Last sale 3/12/2026 at 1:30 PM | $123.55 | $328.53 |
| Previous close 03/11/2026 | $125.61 | $333.47 |
| Consolidated volume 03/11/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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IOO | OEF | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
IOO | OEF | |
|---|---|---|
| Last price | $123.55 | $328.53 |
| 1D performance | -1.64% | -1.48% |
| AuM | $7.90 B | $28.59 B |
| E/R | 0.4% | 0.2% |
Countries
Sectors
Diversification
Total weight of top 15 holdings out of 15
Total weight of top 15 holdings out of 15
Top 15 holdings
How have the IOO and OEF ETFs performed in 2026?
As of March 11, 2026, IOO is down -0.81% year-to-date (YTD), while OEF has lost -2.74%. That puts IOO better performer ahead so far this year.
Which ETF is attracting more investor money: IOO or OEF?
Year-to-date, the IOO ETF saw -$51M in flows, compared to +$217M for OEF.
Which ETF is more volatile: IOO or OEF?
Over the past year, IOO had a volatility of 18.87%, while OEF experienced 19.22%.
Which ETF is bigger: IOO or OEF?
As of March 11, 2026, IOO holds $7.90 B in assets under management (AUM), while OEF manages $28.59 B.
What sectors do the IOO and OEF ETFs invest in?
IOO leans toward sectors like Information Technology, Communication Services and Health Care. Meanwhile, OEF focuses on Information Technology, Communication Services and Consumer Discretionary.
What are the top holdings of the IOO ETF and OEF ETF?
IOO top holdings include NVIDIA, APPLE and MICROSOFT-T. OEF holds in its top three: NVIDIA, APPLE and MICROSOFT-T.
Which ETF is more diversified: IOO or OEF?
IOO holds 103 securities with 64.35% of its assets in the top 15. OEF has 102 securities and a top 15 weight of 61.62%.
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