OEF vs. ITOT

Last updated Jun 4, 2026

OEF (iShares S&P 100 ETF) and ITOT (iShares Core S&P Total U.S. Stock Market ETF) are both exchange-traded funds - OEF is a Large Cap Growth Equities fund tracking the S&P 100 Index, while ITOT is a Large Cap Blend Equities fund tracking the S&P Total Market Index. Both are passively managed. Over the past 10 years, OEF returned 16.71%/yr vs 15.01%/yr for ITOT. With a 0.96 correlation, they move nearly in lockstep. OEF charges 0.20%/yr vs 0.03%/yr for ITOT.

Performance

OEF vs. ITOT - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares S&P 100 ETF (OEF) and iShares Core S&P Total U.S. Stock Market ETF (ITOT). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OEF achieves a 9.51% return, which is significantly lower than ITOT's 11.25% return. Over the past 10 years, OEF has outperformed ITOT with an annualized return of 16.71%, while ITOT has yielded a comparatively lower 15.01% annualized return.

OEF

• 1D: -0.87%
• 1M: 5.44%
• YTD: 9.51%
• 6M: 9.34%
• 1Y: 29.54%
• 3Y*: 24.53%
• 5Y*: 15.70%
• 10Y*: 16.71%

ITOT

• 1D: -0.73%
• 1M: 5.01%
• YTD: 11.25%
• 6M: 11.12%
• 1Y: 28.12%
• 3Y*: 22.09%
• 5Y*: 12.69%
• 10Y*: 15.01%

*Multi-year figures are annualized to reflect compound growth (CAGR)

OEF vs. ITOT - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OEF iShares S&P 100 ETF	9.51%	19.80%	30.74%	32.71%	-21.03%	29.18%	21.21%	31.87%	-4.16%	21.82%
ITOT iShares Core S&P Total U.S. Stock Market ETF	11.25%	17.00%	23.80%	26.12%	-19.47%	25.68%	20.71%	30.67%	-5.33%	21.37%

Correlation

The correlation between OEF and ITOT is 0.94, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.97
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Jan 26, 2004	0.96

The correlation between OEF and ITOT has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

OEF vs. ITOT - Sectors Allocation Comparison

Sectors	OEF	ITOT
Technology	41.0%	33.8%
Communication Services	14.5%	10.3%
Financial Services	10.7%	12.1%
Consumer Cyclical	10.5%	10.1%
Healthcare	8.3%	9.0%
Consumer Defensive	5.4%	4.7%
Industrials	5.3%	9.5%
Energy	2.6%	3.7%
Utilities	0.9%	2.3%
Basic Materials	0.5%	2.1%
Real Estate	0.3%	2.4%

Return for Risk

OEF vs. ITOT — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

OEF

OEF Risk / Return Rank: 64
OEF Sharpe Ratio Rank: 69
OEF Sortino Ratio Rank: 67
OEF Omega Ratio Rank: 68
OEF Calmar Ratio Rank: 53
OEF Martin Ratio Rank: 62

ITOT

ITOT Risk / Return Rank: 68
ITOT Sharpe Ratio Rank: 69
ITOT Sortino Ratio Rank: 68
ITOT Omega Ratio Rank: 67
ITOT Calmar Ratio Rank: 63
ITOT Martin Ratio Rank: 75

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

OEF vs. ITOT - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares S&P 100 ETF (OEF) and iShares Core S&P Total U.S. Stock Market ETF (ITOT). 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.

	OEF	ITOT	Difference
Sharpe ratio: Return per unit of total volatility	2.33	2.32	+0.02
Sortino ratio: Return per unit of downside risk	3.15	3.17	-0.02
Omega ratio: Gain probability vs. loss probability	1.42	1.42	0.00
Calmar ratio: Return relative to maximum drawdown	2.68	3.17	-0.49
Martin ratio: Return relative to average drawdown	11.29	14.57	-3.28
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OEF vs. ITOT - Sharpe Ratio Comparison

The current OEF Sharpe Ratio is 2.33, which is comparable to the ITOT Sharpe Ratio of 2.32. The chart below compares the historical Sharpe Ratios of OEF and ITOT, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	OEF	ITOT	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.33	2.32	+0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.89	0.74	+0.16
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.91	0.82	+0.08
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.57	-0.13

Drawdowns

OEF vs. ITOT - Drawdown Comparison

The maximum OEF drawdown since its inception was -54.11%, roughly equal to the maximum ITOT drawdown of -55.20%. Use the drawdown chart below to compare losses from any high point for OEF and ITOT.

Drawdown Indicators

	OEF	ITOT	Difference
Max Drawdown Largest peak-to-trough decline	-54.11%	-55.20%	+1.09%
Max Drawdown (1Y) Largest decline over 1 year	-11.06%	-8.90%	-2.16%
Max Drawdown (3Y) Largest decline over 3 years	-19.80%	-19.44%	-0.36%
Max Drawdown (5Y) Largest decline over 5 years	-26.47%	-25.36%	-1.11%
Max Drawdown (10Y) Largest decline over 10 years	-31.44%	-35.00%	+3.56%
Current Drawdown Current decline from peak	-0.94%	-0.73%	-0.21%
Average Drawdown Average peak-to-trough decline	-11.76%	-6.97%	-4.79%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.62%	1.94%	+0.68%

Volatility

OEF vs. ITOT - Volatility Comparison

iShares S&P 100 ETF (OEF) has a higher volatility of 3.14% compared to iShares Core S&P Total U.S. Stock Market ETF (ITOT) at 2.99%. This indicates that OEF's price experiences larger fluctuations and is considered to be riskier than ITOT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OEF	ITOT	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.14%	2.99%	+0.15%
Volatility (6M) Calculated over the trailing 6-month period	9.48%	9.13%	+0.35%
Volatility (1Y) Calculated over the trailing 1-year period	12.73%	12.20%	+0.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.69%	17.36%	+0.33%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.44%	18.26%	+0.18%

OEF vs. ITOT - Expense Ratio Comparison

OEF has a 0.20% expense ratio, which is higher than ITOT's 0.03% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.

Dividends

OEF vs. ITOT - Dividend Comparison

OEF's dividend yield for the trailing twelve months is around 0.83%, less than ITOT's 0.98% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ITOT iShares Core S&P Total U.S. Stock Market ETF	0.98%	1.11%	1.23%	1.47%	1.66%	1.18%	1.41%	1.88%	2.14%	1.69%	1.83%	2.01%
OEF iShares S&P 100 ETF	0.83%	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

Can I hold both OEF and ITOT in my portfolio?

With a correlation of 0.94, OEF and ITOT move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, OEF or ITOT?

OEF has higher volatility (3.14%) compared to ITOT (2.99%). In terms of maximum drawdown, OEF dropped -54.11% vs ITOT's -55.20%.

Which ETF is better, OEF or ITOT?

On 10-year performance, OEF leads with 16.71% vs 15.01% for ITOT. On fees, ITOT is cheaper at 0.03% per year. On volatility, ITOT has been the lower-risk option at 2.99%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, OEF or ITOT?

Over the 10-year period, OEF has performed better with a 16.71% return vs 15.01%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, OEF or ITOT?

ITOT is cheaper with a 0.03% expense ratio, compared with 0.20% for OEF.

Which ETF pays a higher dividend yield, OEF or ITOT?

ITOT has the higher dividend yield at 0.98%, compared with 0.83% for OEF.

What is the main difference between OEF and ITOT?

OEF is categorized as Large Cap Growth Equities, while ITOT is Large Cap Blend Equities. OEF tracks S&P 100 Index, while ITOT tracks S&P Total Market Index. Their fees differ too: 0.20% for OEF and 0.03% for ITOT.

Which has better risk-adjusted returns?

OEF currently has the higher Sharpe Ratio (2.33 vs 2.32), 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.