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ITOT vs. VOO
Performance
Return for Risk
Drawdowns
Volatility
Dividends

ITOT vs. VOO

Last updated Jun 23, 2026

ITOT (iShares Core S&P Total U.S. Stock Market ETF) and VOO (Vanguard S&P 500 ETF) are both exchange-traded funds - ITOT is a Large Cap Blend Equities fund tracking the S&P Total Market Index, while VOO is a S&P 500 fund tracking the S&P 500 Index. Both are passively managed. Over the past 10 years, ITOT returned 15.26%/yr vs 15.77%/yr for VOO. With a 0.99 correlation, they move nearly in lockstep. Both charge a 0.03% expense ratio.

Performance

ITOT vs. VOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iShares Core S&P Total U.S. Stock Market ETF (ITOT) and Vanguard S&P 500 ETF (VOO). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, ITOT achieves a 10.37% return, which is significantly higher than VOO's 9.75% return. Both investments have delivered pretty close results over the past 10 years, with ITOT having a 15.26% annualized return and VOO not far ahead at 15.77%.

ITOT

1D
-0.32%
1M
0.50%
YTD
10.37%
6M
9.62%
1Y
27.18%
3Y*
21.20%
5Y*
12.36%
10Y*
15.26%

VOO

1D
-0.29%
1M
0.08%
YTD
9.75%
6M
9.30%
1Y
26.77%
3Y*
21.36%
5Y*
13.58%
10Y*
15.77%
*Multi-year figures are annualized to reflect compound growth (CAGR)

ITOT vs. VOO - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
ITOT
iShares Core S&P Total U.S. Stock Market ETF		10.37%17.00%23.80%26.12%-19.47%25.68%20.71%30.67%-5.33%21.37%
VOO
Vanguard S&P 500 ETF		9.75%17.82%24.98%26.32%-18.17%28.79%18.32%31.37%-4.50%21.77%

Correlation

The correlation between ITOT and VOO is 0.99 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.99

Correlation (3Y)
Calculated over the trailing 3-year period

0.99

Correlation (5Y)
Calculated over the trailing 5-year period

0.99

Correlation (10Y)
Calculated over the trailing 10-year period

0.99

Correlation (All Time)
Calculated using the full available price history since Sep 9, 2010

0.99

The correlation between ITOT and VOO has been stable across timeframes, ranging from 0.99 to 0.99 - a consistent structural relationship.

ITOT vs. VOO - Sectors Allocation Comparison

Sectors
ITOT
VOO

Technology

37.2%
39.1%

Financial Services

11.4%
10.9%

Consumer Cyclical

9.8%
9.8%

Communication Services

9.8%
10.5%

Industrials

9.1%
7.6%

Healthcare

8.8%
8.3%

Consumer Defensive

4.3%
4.5%

Energy

3.3%
3.2%

Real Estate

2.3%
1.8%

Utilities

2.1%
2.5%

Basic Materials

2.0%
1.7%

Technology

ITOT
37.2%
VOO
39.1%

Financial Services

ITOT
11.4%
VOO
10.9%

Consumer Cyclical

ITOT
9.8%
VOO
9.8%

Communication Services

ITOT
9.8%
VOO
10.5%

Industrials

ITOT
9.1%
VOO
7.6%

Healthcare

ITOT
8.8%
VOO
8.3%

Consumer Defensive

ITOT
4.3%
VOO
4.5%

Energy

ITOT
3.3%
VOO
3.2%

Real Estate

ITOT
2.3%
VOO
1.8%

Utilities

ITOT
2.1%
VOO
2.5%

Basic Materials

ITOT
2.0%
VOO
1.7%

Compare stocks, funds, or ETFs

Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.

iShares Core S&P Total U.S. Stock Market ETF

Vanguard S&P 500 ETF

Often compared with ITOT:
ITOT vs. VTIITOT vs. SCHBITOT vs. SPYITOT vs. FSKAXITOT vs. IVVITOT vs. IXUSITOT vs. VT
Often compared with VOO:
VOO vs. VTIVOO vs. QQQVOO vs. SCHDVOO vs. VTVOO vs. SPYVOO vs. FXAIXVOO vs. VGT

Return for Risk

ITOT vs. VOO — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
ITOT
ITOT Risk / Return Rank: 6868
Overall Rank
ITOT Sharpe Ratio Rank: 6868
Sharpe Ratio Rank
ITOT Sortino Ratio Rank: 6565
Sortino Ratio Rank
ITOT Omega Ratio Rank: 6767
Omega Ratio Rank
ITOT Calmar Ratio Rank: 6464
Calmar Ratio Rank
ITOT Martin Ratio Rank: 7474
Martin Ratio Rank
VOO
VOO Risk / Return Rank: 6868
Overall Rank
VOO Sharpe Ratio Rank: 7070
Sharpe Ratio Rank
VOO Sortino Ratio Rank: 6767
Sortino Ratio Rank
VOO Omega Ratio Rank: 6969
Omega Ratio Rank
VOO Calmar Ratio Rank: 6363
Calmar Ratio Rank
VOO Martin Ratio Rank: 7474
Martin Ratio Rank
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.

ITOT vs. VOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iShares Core S&P Total U.S. Stock Market ETF (ITOT) and Vanguard S&P 500 ETF (VOO). 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.

ITOTVOODifference
Sharpe ratioReturn per unit of total volatility
2.14
2.17

-0.04

Sortino ratioReturn per unit of downside risk
2.89
2.93

-0.04

Omega ratioGain probability vs. loss probability

1.38

1.39

-0.01

Calmar ratioReturn relative to maximum drawdown

3.07

3.02

+0.05

Martin ratioReturn relative to average drawdown

13.65

13.58

+0.07

ITOT vs. VOO - Sharpe Ratio Comparison

The current ITOT Sharpe Ratio is 2.14, which is comparable to the VOO Sharpe Ratio of 2.17. The chart below compares the historical Sharpe Ratios of ITOT and VOO, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

ITOT vs. VOO - Drawdown Comparison

The maximum ITOT drawdown since its inception was -55.20%, which is greater than VOO's maximum drawdown of -33.99%. Use the drawdown chart below to compare losses from any high point for ITOT and VOO.

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Drawdown Indicators

ITOTVOODifference

Max Drawdown

Largest peak-to-trough decline

-55.20%

-33.99%

-21.21%

Max Drawdown (1Y)

Largest decline over 1 year

-8.90%

-8.90%

0.00%

Max Drawdown (3Y)

Largest decline over 3 years

-19.44%

-18.69%

-0.75%

Max Drawdown (5Y)

Largest decline over 5 years

-25.36%

-24.52%

-0.84%

Max Drawdown (10Y)

Largest decline over 10 years

-35.00%

-33.99%

-1.01%

Current Drawdown

Current decline from peak

-1.51%

-1.74%

+0.23%

Average Drawdown

Average peak-to-trough decline

-6.96%

-3.68%

-3.28%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.00%

1.98%

+0.02%

Volatility

ITOT vs. VOO - Volatility Comparison

iShares Core S&P Total U.S. Stock Market ETF (ITOT) and Vanguard S&P 500 ETF (VOO) have volatilities of 4.78% and 4.60%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

ITOTVOODifference

Volatility (1M)

Calculated over the trailing 1-month period

4.78%

4.60%

+0.18%

Volatility (6M)

Calculated over the trailing 6-month period

9.98%

9.73%

+0.25%

Volatility (1Y)

Calculated over the trailing 1-year period

12.80%

12.39%

+0.41%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.45%

16.90%

+0.55%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

18.31%

18.05%

+0.26%

ITOT vs. VOO - Expense Ratio Comparison

Both ITOT and VOO have an expense ratio of 0.03%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

ITOT vs. VOO - Dividend Comparison

ITOT's dividend yield for the trailing twelve months is around 1.01%, less than VOO's 1.04% yield.

PositionTTM20252024202320222021202020192018201720162015
ITOT
iShares Core S&P Total U.S. Stock Market ETF		1.01%1.11%1.23%1.47%1.66%1.18%1.41%1.88%2.14%1.69%1.83%2.01%
VOO
Vanguard S&P 500 ETF		1.04%1.13%1.24%1.46%1.69%1.25%1.54%1.88%2.06%1.78%2.02%2.10%

Frequently Asked Questions

With a correlation of 0.99, ITOT and VOO 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.

ITOT has higher volatility (4.78%) compared to VOO (4.60%). In terms of maximum drawdown, ITOT dropped -55.20% vs VOO's -33.99%.

On 10-year performance, VOO leads with 15.77% vs 15.26% for ITOT. Both ETFs have the same 0.03% expense ratio. On volatility, VOO has been the lower-risk option at 4.60%. The better choice depends on whether you care most about return, fees, risk, or income.

Over the 10-year period, VOO has performed better with a 15.77% return vs 15.26%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

ITOT and VOO have the same expense ratio: 0.03% per year.

VOO has the higher dividend yield at 1.04%, compared with 1.01% for ITOT.

ITOT is categorized as Large Cap Blend Equities, while VOO is S&P 500. ITOT tracks S&P Total Market Index, while VOO tracks S&P 500 Index. They also come from different issuers: iShares and Vanguard.

VOO currently has the higher Sharpe Ratio (2.17 vs 2.14), 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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