VTI vs. IOO

Last updated Jun 13, 2026

VTI (Vanguard Total Stock Market ETF) and IOO (iShares Global 100 ETF) are both exchange-traded funds - VTI is a Large Cap Blend Equities fund tracking the CRSP US Total Market Index, while IOO is a Global Equities fund tracking the S&P Global 100 Index (Net). Both are passively managed. Over the past 10 years, VTI returned 15.02%/yr vs 16.66%/yr for IOO. Their correlation of 0.90 suggests significant overlap in exposure. VTI charges 0.03%/yr vs 0.40%/yr for IOO.

Performance

VTI vs. IOO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard Total Stock Market ETF (VTI) and iShares Global 100 ETF (IOO). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with VTI having a 9.62% return and IOO slightly lower at 9.16%. Over the past 10 years, VTI has underperformed IOO with an annualized return of 15.02%, while IOO has yielded a comparatively higher 16.66% annualized return.

VTI

• 1D: 0.57%
• 1M: 0.45%
• YTD: 9.62%
• 6M: 9.69%
• 1Y: 24.78%
• 3Y*: 20.60%
• 5Y*: 12.20%
• 10Y*: 15.02%

IOO

• 1D: 0.11%
• 1M: -2.09%
• YTD: 9.16%
• 6M: 10.36%
• 1Y: 31.99%
• 3Y*: 23.85%
• 5Y*: 15.85%
• 10Y*: 16.66%

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

VTI vs. IOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VTI Vanguard Total Stock Market ETF	9.62%	17.10%	23.81%	26.05%	-19.52%	25.68%	21.08%	30.67%	-5.23%	21.21%
IOO iShares Global 100 ETF	9.16%	27.02%	26.54%	27.71%	-16.34%	26.03%	18.61%	30.01%	-6.22%	23.56%

Correlation

The correlation between VTI and IOO is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since May 31, 2001	0.90

The correlation between VTI and IOO has been stable across timeframes, ranging from 0.90 to 0.93 - a consistent structural relationship.

VTI vs. IOO - Sectors Allocation Comparison

Sectors	VTI	IOO
Technology	33.5%	46.2%
Financial Services	12.0%	9.1%
Communication Services	10.3%	11.0%
Consumer Cyclical	10.0%	8.4%
Industrials	9.8%	4.8%
Healthcare	9.2%	8.4%
Consumer Defensive	4.7%	5.6%
Energy	3.7%	3.6%
Real Estate	2.4%	0.2%
Utilities	2.3%	0.5%
Basic Materials	2.0%	1.7%

Return for Risk

VTI vs. IOO — Risk / Return Rank

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

VTI

VTI Risk / Return Rank: 70
VTI Sharpe Ratio Rank: 70
VTI Sortino Ratio Rank: 68
VTI Omega Ratio Rank: 69
VTI Calmar Ratio Rank: 64
VTI Martin Ratio Rank: 76

IOO

IOO Risk / Return Rank: 80
IOO Sharpe Ratio Rank: 83
IOO Sortino Ratio Rank: 80
IOO Omega Ratio Rank: 80
IOO Calmar Ratio Rank: 73
IOO Martin Ratio Rank: 83

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.

VTI vs. IOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Stock Market ETF (VTI) and iShares Global 100 ETF (IOO). 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.

	VTI	IOO	Difference
Sharpe ratio: Return per unit of total volatility	1.97	2.28	-0.31
Sortino ratio: Return per unit of downside risk	2.67	3.09	-0.42
Omega ratio: Gain probability vs. loss probability	1.35	1.41	-0.05
Calmar ratio: Return relative to maximum drawdown	2.79	3.23	-0.44
Martin ratio: Return relative to average drawdown	12.52	14.35	-1.83

VTI vs. IOO - Sharpe Ratio Comparison

The current VTI Sharpe Ratio is 1.97, which is comparable to the IOO Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of VTI and IOO, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

VTI vs. IOO - Drawdown Comparison

The maximum VTI drawdown since its inception was -55.45%, roughly equal to the maximum IOO drawdown of -55.85%. Use the drawdown chart below to compare losses from any high point for VTI and IOO.

Drawdown Indicators

	VTI	IOO	Difference
Max Drawdown Largest peak-to-trough decline	-55.45%	-55.85%	+0.40%
Max Drawdown (1Y) Largest decline over 1 year	-8.92%	-9.94%	+1.02%
Max Drawdown (3Y) Largest decline over 3 years	-19.30%	-19.19%	-0.11%
Max Drawdown (5Y) Largest decline over 5 years	-25.36%	-23.52%	-1.84%
Max Drawdown (10Y) Largest decline over 10 years	-35.00%	-31.43%	-3.57%
Current Drawdown Current decline from peak	-2.14%	-4.05%	+1.91%
Average Drawdown Average peak-to-trough decline	-8.02%	-11.26%	+3.24%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.99%	2.24%	-0.25%

Volatility

VTI vs. IOO - Volatility Comparison

The current volatility for Vanguard Total Stock Market ETF (VTI) is 4.50%, while iShares Global 100 ETF (IOO) has a volatility of 4.82%. This indicates that VTI experiences smaller price fluctuations and is considered to be less risky than IOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VTI	IOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.50%	4.82%	-0.32%
Volatility (6M) Calculated over the trailing 6-month period	9.82%	11.31%	-1.49%
Volatility (1Y) Calculated over the trailing 1-year period	12.64%	14.07%	-1.43%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.47%	17.12%	+0.35%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.33%	17.80%	+0.53%

VTI vs. IOO - Expense Ratio Comparison

VTI has a 0.03% expense ratio, which is lower than IOO's 0.40% expense ratio.

Dividends

VTI vs. IOO - Dividend Comparison

VTI's dividend yield for the trailing twelve months is around 1.03%, more than IOO's 0.84% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IOO iShares Global 100 ETF	0.84%	0.92%	1.08%	1.49%	2.00%	1.53%	1.49%	2.02%	2.54%	2.23%	2.75%	2.89%
VTI Vanguard Total Stock Market ETF	1.03%	1.12%	1.27%	1.44%	1.66%	1.21%	1.42%	1.78%	2.04%	1.71%	1.92%	1.98%

Frequently Asked Questions

Can I hold both VTI and IOO in my portfolio?

With a correlation of 0.92, VTI and IOO 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, VTI or IOO?

IOO has higher volatility (4.82%) compared to VTI (4.50%). In terms of maximum drawdown, VTI dropped -55.45% vs IOO's -55.85%.

Which ETF is better, VTI or IOO?

On 10-year performance, IOO leads with 16.66% vs 15.02% for VTI. On fees, VTI is cheaper at 0.03% per year. On volatility, VTI has been the lower-risk option at 4.50%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VTI or IOO?

Over the 10-year period, IOO has performed better with a 16.66% return vs 15.02%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VTI or IOO?

VTI is cheaper with a 0.03% expense ratio, compared with 0.40% for IOO.

Which ETF pays a higher dividend yield, VTI or IOO?

VTI has the higher dividend yield at 1.03%, compared with 0.84% for IOO.

What is the main difference between VTI and IOO?

VTI is categorized as Large Cap Blend Equities, while IOO is Global Equities. VTI tracks CRSP US Total Market Index, while IOO tracks S&P Global 100 Index (Net). They also come from different issuers: Vanguard and iShares. Their fees differ too: 0.03% for VTI and 0.40% for IOO.

Which has better risk-adjusted returns?

IOO currently has the higher Sharpe Ratio (2.28 vs 1.97), 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.