OEF vs. IAK
OEF (iShares S&P 100 ETF) and IAK (iShares U.S. Insurance ETF) are both exchange-traded funds - OEF is a Large Cap Blend Equities fund tracking the S&P 100 Index, while IAK is a Financials Equities fund tracking the Dow Jones U.S. Select Insurance Index. Both are passively managed. Over the past 10 years, OEF returned 16.78%/yr vs 12.68%/yr for IAK. A 0.66 correlation means they provide meaningful diversification when combined. OEF charges 0.20%/yr vs 0.43%/yr for IAK.
Performance
OEF vs. IAK - Performance Comparison
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Returns By Period
In the year-to-date period, OEF achieves a 8.71% return, which is significantly higher than IAK's 0.99% return. Over the past 10 years, OEF has outperformed IAK with an annualized return of 16.78%, while IAK has yielded a comparatively lower 12.68% annualized return.
OEF
- 1D
- 2.03%
- 1M
- 0.66%
- YTD
- 8.71%
- 6M
- 9.60%
- 1Y
- 28.24%
- 3Y*
- 23.02%
- 5Y*
- 15.42%
- 10Y*
- 16.78%
IAK
- 1D
- -0.12%
- 1M
- 2.58%
- YTD
- 0.99%
- 6M
- -0.34%
- 1Y
- 5.04%
- 3Y*
- 18.02%
- 5Y*
- 13.43%
- 10Y*
- 12.68%
OEF vs. IAK - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OEF iShares S&P 100 ETF | 8.71% | 19.80% | 30.74% | 32.71% | -21.03% | 29.18% | 21.21% | 31.87% | -4.16% | 21.82% |
IAK iShares U.S. Insurance ETF | 0.99% | 9.50% | 28.25% | 11.28% | 11.33% | 26.84% | -2.86% | 25.94% | -11.48% | 14.18% |
Correlation
The correlation between OEF and IAK is 0.05, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.05 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.20 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.40 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.51 |
Correlation (All Time) Calculated using the full available price history since May 5, 2006 | 0.66 |
Over the past year, the correlation between OEF and IAK has dropped to 0.05 - well below their long-term average of 0.66, suggesting their price drivers have been diverging.
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Return for Risk
OEF vs. IAK — Risk / Return Rank
OEF
IAK
OEF vs. IAK - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares S&P 100 ETF (OEF) and iShares U.S. Insurance ETF (IAK). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| OEF | IAK | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.80 | ||
| Sortino ratioReturn per unit of downside risk | +2.30 | ||
| Omega ratioGain probability vs. loss probability | 1.39 | 1.07 | +0.32 |
| Calmar ratioReturn relative to maximum drawdown | 2.57 | 0.66 | +1.90 |
| Martin ratioReturn relative to average drawdown | 10.52 | 1.48 | +9.04 |
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Drawdowns
OEF vs. IAK - Drawdown Comparison
The maximum OEF drawdown since its inception was -54.11%, smaller than the maximum IAK drawdown of -77.38%. Use the drawdown chart below to compare losses from any high point for OEF and IAK.
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Drawdown Indicators
| OEF | IAK | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -54.11% | -77.38% | +23.27% |
Max Drawdown (1Y)Largest decline over 1 year | -11.06% | -7.62% | -3.44% |
Max Drawdown (3Y)Largest decline over 3 years | -19.80% | -11.58% | -8.22% |
Max Drawdown (5Y)Largest decline over 5 years | -26.47% | -14.76% | -11.71% |
Max Drawdown (10Y)Largest decline over 10 years | -31.44% | -44.95% | +13.51% |
Current DrawdownCurrent decline from peak | -1.67% | -0.34% | -1.33% |
Average DrawdownAverage peak-to-trough decline | -11.74% | -16.11% | +4.37% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.69% | 3.41% | -0.72% |
Volatility
OEF vs. IAK - Volatility Comparison
The current volatility for iShares S&P 100 ETF (OEF) is 4.96%, while iShares U.S. Insurance ETF (IAK) has a volatility of 5.45%. This indicates that OEF experiences smaller price fluctuations and is considered to be less risky than IAK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OEF | IAK | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.96% | 5.45% | -0.49% |
Volatility (6M)Calculated over the trailing 6-month period | 10.42% | 10.48% | -0.06% |
Volatility (1Y)Calculated over the trailing 1-year period | 13.29% | 15.04% | -1.75% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.79% | 18.14% | -0.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.49% | 20.92% | -2.43% |
OEF vs. IAK - Expense Ratio Comparison
OEF has a 0.20% expense ratio, which is lower than IAK's 0.43% expense ratio.
Dividends
OEF vs. IAK - Dividend Comparison
OEF's dividend yield for the trailing twelve months is around 1.04%, less than IAK's 2.90% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IAK iShares U.S. Insurance ETF | 2.90% | 1.69% | 1.49% | 1.44% | 1.69% | 2.26% | 2.07% | 1.84% | 2.33% | 1.62% | 1.68% | 1.62% |
OEF iShares S&P 100 ETF | 1.04% | 0.81% | 1.03% | 1.19% | 1.55% | 1.06% | 1.43% | 1.87% | 2.09% | 1.81% | 2.07% | 2.11% |
Frequently Asked Questions
OEF and IAK have a correlation of 0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IAK has higher volatility (5.45%) compared to OEF (4.96%). In terms of maximum drawdown, OEF dropped -54.11% vs IAK's -77.38%.
On 10-year performance, OEF leads with 16.78% vs 12.68% for IAK. On fees, OEF is cheaper at 0.20% per year. On volatility, OEF has been the lower-risk option at 4.96%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, OEF has performed better with a 16.78% return vs 12.68%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
OEF is cheaper with a 0.20% expense ratio, compared with 0.43% for IAK.
IAK has the higher dividend yield at 2.90%, compared with 1.04% for OEF.
OEF is categorized as Large Cap Blend Equities, while IAK is Financials Equities. OEF tracks S&P 100 Index, while IAK tracks Dow Jones U.S. Select Insurance Index. Their fees differ too: 0.20% for OEF and 0.43% for IAK.
OEF currently has the higher Sharpe Ratio (2.14 vs 0.34), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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