VT vs. IOO

Last updated Jun 14, 2026

VT (Vanguard Total World Stock ETF) and IOO (iShares Global 100 ETF) are both Global Equities funds - VT tracks the FTSE Global All Cap Index while IOO tracks the S&P Global 100 Index (Net). Both are passively managed. Over the past 10 years, VT returned 12.93%/yr vs 16.66%/yr for IOO. Their correlation of 0.94 suggests significant overlap in exposure. VT charges 0.06%/yr vs 0.40%/yr for IOO.

Performance

VT vs. IOO - Performance Comparison

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

Returns By Period

In the year-to-date period, VT achieves a 11.06% return, which is significantly higher than IOO's 9.16% return. Over the past 10 years, VT has underperformed IOO with an annualized return of 12.93%, while IOO has yielded a comparatively higher 16.66% annualized return.

VT

• 1D: 0.44%
• 1M: 0.17%
• YTD: 11.06%
• 6M: 11.82%
• 1Y: 27.43%
• 3Y*: 19.71%
• 5Y*: 10.65%
• 10Y*: 12.93%

IOO

• 1D: 0.11%
• 1M: -2.94%
• YTD: 9.16%
• 6M: 10.36%
• 1Y: 33.70%
• 3Y*: 23.85%
• 5Y*: 15.85%
• 10Y*: 16.66%

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

VT vs. IOO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
VT Vanguard Total World Stock ETF	11.06%	22.43%	16.49%	22.02%	-18.00%	18.27%	16.59%	26.81%	-9.76%	24.50%
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 VT and IOO is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Jun 26, 2008	0.94

The correlation between VT and IOO has been stable across timeframes, ranging from 0.91 to 0.94 - a consistent structural relationship.

VT vs. IOO - Sectors Allocation Comparison

Sectors	VT	IOO
Technology	27.8%	47.0%
Financial Services	15.9%	9.2%
Industrials	12.0%	4.8%
Consumer Cyclical	9.5%	8.4%
Communication Services	8.3%	10.8%
Healthcare	8.1%	8.4%
Consumer Defensive	4.8%	5.6%
Energy	4.3%	3.6%
Basic Materials	4.2%	1.7%
Utilities	2.7%	0.5%
Real Estate	2.4%	0.2%

Return for Risk

VT vs. IOO — Risk / Return Rank

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

VT

VT Risk / Return Rank: 68
VT Sharpe Ratio Rank: 69
VT Sortino Ratio Rank: 68
VT Omega Ratio Rank: 69
VT Calmar Ratio Rank: 62
VT Martin Ratio Rank: 72

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.

VT vs. IOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Total World Stock ETF (VT) 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.

	VT	IOO	Difference
Sharpe ratio: Return per unit of total volatility	1.94	2.28	-0.35
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	2.68	3.23	-0.55
Martin ratio: Return relative to average drawdown	11.67	14.35	-2.68

VT vs. IOO - Sharpe Ratio Comparison

The current VT Sharpe Ratio is 1.94, which is comparable to the IOO Sharpe Ratio of 2.28. The chart below compares the historical Sharpe Ratios of VT 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

VT vs. IOO - Drawdown Comparison

The maximum VT drawdown since its inception was -50.27%, smaller than the maximum IOO drawdown of -55.85%. Use the drawdown chart below to compare losses from any high point for VT and IOO.

Drawdown Indicators

	VT	IOO	Difference
Max Drawdown Largest peak-to-trough decline	-50.27%	-55.85%	+5.58%
Max Drawdown (1Y) Largest decline over 1 year	-9.67%	-9.94%	+0.27%
Max Drawdown (3Y) Largest decline over 3 years	-16.51%	-19.19%	+2.68%
Max Drawdown (5Y) Largest decline over 5 years	-26.38%	-23.52%	-2.86%
Max Drawdown (10Y) Largest decline over 10 years	-34.24%	-31.43%	-2.81%
Current Drawdown Current decline from peak	-1.92%	-4.05%	+2.13%
Average Drawdown Average peak-to-trough decline	-7.01%	-11.26%	+4.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.22%	2.24%	-0.02%

Volatility

VT vs. IOO - Volatility Comparison

Vanguard Total World Stock ETF (VT) has a higher volatility of 5.26% compared to iShares Global 100 ETF (IOO) at 4.82%. This indicates that VT's price experiences larger fluctuations and is considered to be riskier than IOO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VT	IOO	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.26%	4.82%	+0.44%
Volatility (6M) Calculated over the trailing 6-month period	11.01%	11.31%	-0.30%
Volatility (1Y) Calculated over the trailing 1-year period	13.38%	14.07%	-0.69%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.15%	17.12%	-0.97%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.27%	17.80%	-0.53%

VT vs. IOO - Expense Ratio Comparison

VT has a 0.06% expense ratio, which is lower than IOO's 0.40% expense ratio.

Dividends

VT vs. IOO - Dividend Comparison

VT's dividend yield for the trailing twelve months is around 1.61%, 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%
VT Vanguard Total World Stock ETF	1.61%	1.82%	1.95%	2.08%	2.20%	1.82%	1.66%	2.32%	2.53%	2.11%	2.39%	2.45%

Frequently Asked Questions

Can I hold both VT and IOO in my portfolio?

With a correlation of 0.91, VT 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, VT or IOO?

VT has higher volatility (5.26%) compared to IOO (4.82%). In terms of maximum drawdown, VT dropped -50.27% vs IOO's -55.85%.

Which ETF is better, VT or IOO?

On 10-year performance, IOO leads with 16.66% vs 12.93% for VT. On fees, VT is cheaper at 0.06% per year. On volatility, IOO has been the lower-risk option at 4.82%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VT or IOO?

Over the 10-year period, IOO has performed better with a 16.66% return vs 12.93%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VT or IOO?

VT is cheaper with a 0.06% expense ratio, compared with 0.40% for IOO.

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

VT has the higher dividend yield at 1.61%, compared with 0.84% for IOO.

What is the main difference between VT and IOO?

VT tracks FTSE Global All Cap Index, while IOO tracks S&P Global 100 Index (Net). They also come from different issuers: Vanguard and iShares. Their fees differ too: 0.06% for VT and 0.40% for IOO.

Which has better risk-adjusted returns?

IOO currently has the higher Sharpe Ratio (2.28 vs 1.94), 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.