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VSO.AX vs. IOO
Performance
Return for Risk
Dividends
Drawdowns
Volatility

VSO.AX vs. IOO

Last updated Apr 2, 2026

Compare and contrast key facts about Vanguard MSCI Australian Small Companies INDEX ETF (VSO.AX) and iShares Global 100 ETF (IOO).

VSO.AX and IOO are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. VSO.AX is a passively managed fund by Vanguard that tracks the performance of the MSCI Australian Shares Small Cap Index. It was launched on May 23, 2011. IOO is a passively managed fund by iShares that tracks the performance of the S&P Global 100 Index. It was launched on Dec 5, 2000. Both VSO.AX and IOO are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

VSO.AX vs. IOO - Performance Comparison

The chart below illustrates the hypothetical performance of a A$10,000 investment in Vanguard MSCI Australian Small Companies INDEX ETF (VSO.AX) and iShares Global 100 ETF (IOO). The values are adjusted to include any dividend payments, if applicable.

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VSO.AX vs. IOO - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
VSO.AX
Vanguard MSCI Australian Small Companies INDEX ETF		-6.66%24.14%8.91%6.32%-11.74%21.77%14.75%21.67%-7.43%17.67%
IOO
iShares Global 100 ETF		-6.59%17.80%39.28%27.80%-10.81%33.42%8.19%30.62%3.83%14.15%
Different Trading Currencies

VSO.AX is traded in AUD, while IOO is traded in USD. To make them comparable, the IOO values have been converted to AUD using the latest available exchange rates.

Returns By Period

The year-to-date returns for both investments are quite close, with VSO.AX having a -6.66% return and IOO slightly higher at -6.59%. Over the past 10 years, VSO.AX has underperformed IOO with an annualized return of 9.71%, while IOO has yielded a comparatively higher 16.40% annualized return.

VSO.AX

1D
2.54%
1M
-7.87%
YTD
-6.66%
6M
-5.40%
1Y
17.76%
3Y*
10.48%
5Y*
6.92%
10Y*
9.71%

IOO

1D
1.13%
1M
-0.93%
YTD
-6.59%
6M
-2.73%
1Y
16.32%
3Y*
20.64%
5Y*
16.83%
10Y*
16.40%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Compare stocks, funds, or ETFs

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

Vanguard MSCI Australian Small Companies INDEX ETF

iShares Global 100 ETF

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VSO.AX vs. IOO - Expense Ratio Comparison

VSO.AX has a 0.30% expense ratio, which is lower than IOO's 0.40% expense ratio.

IOO
iShares Global 100 ETF
VSO.AX
Vanguard MSCI Australian Small Companies INDEX ETF

Return for Risk

VSO.AX vs. IOO — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
VSO.AX
VSO.AX Risk / Return Rank: 4545
Overall Rank
VSO.AX Sharpe Ratio Rank: 5252
Sharpe Ratio Rank
VSO.AX Sortino Ratio Rank: 5151
Sortino Ratio Rank
VSO.AX Omega Ratio Rank: 4747
Omega Ratio Rank
VSO.AX Calmar Ratio Rank: 3737
Calmar Ratio Rank
VSO.AX Martin Ratio Rank: 3838
Martin Ratio Rank
IOO
IOO Risk / Return Rank: 8181
Overall Rank
IOO Sharpe Ratio Rank: 7777
Sharpe Ratio Rank
IOO Sortino Ratio Rank: 8080
Sortino Ratio Rank
IOO Omega Ratio Rank: 8080
Omega Ratio Rank
IOO Calmar Ratio Rank: 8080
Calmar Ratio Rank
IOO Martin Ratio Rank: 8686
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.

VSO.AX vs. IOO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard MSCI Australian Small Companies INDEX ETF (VSO.AX) 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.

VSO.AXIOODifference

Sharpe ratio

Return per unit of total volatility

1.00

0.98

+0.02

Sortino ratio

Return per unit of downside risk

1.43

1.44

-0.01

Omega ratio

Gain probability vs. loss probability

1.19

1.22

-0.02

Calmar ratio

Return relative to maximum drawdown

1.11

1.36

-0.25

Martin ratio

Return relative to average drawdown

4.08

4.08

0.00

Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VSO.AX vs. IOO - Sharpe Ratio Comparison

The current VSO.AX Sharpe Ratio is 1.00, which is comparable to the IOO Sharpe Ratio of 0.98. The chart below compares the historical Sharpe Ratios of VSO.AX and IOO, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

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Sharpe Ratios by Period

VSO.AXIOODifference

Sharpe Ratio (1Y)

Calculated over the trailing 1-year period

1.00

0.98

+0.02

Sharpe Ratio (5Y)

Calculated over the trailing 5-year period

0.43

1.17

-0.74

Sharpe Ratio (10Y)

Calculated over the trailing 10-year period

0.57

1.04

-0.46

Sharpe Ratio (All Time)

Calculated using the full available price history

0.39

0.61

-0.23

Correlation

The correlation between VSO.AX and IOO is 0.07, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

VSO.AX vs. IOO - Dividend Comparison

VSO.AX's dividend yield for the trailing twelve months is around 7.35%, more than IOO's 0.95% yield.

TTM20252024202320222021202020192018201720162015
VSO.AX
Vanguard MSCI Australian Small Companies INDEX ETF		7.35%6.86%2.44%3.89%5.39%3.55%6.24%2.96%2.21%3.86%3.30%2.68%
IOO
iShares Global 100 ETF		0.95%0.92%1.08%1.49%2.00%1.53%1.49%2.02%2.54%2.23%2.75%2.89%

Drawdowns

VSO.AX vs. IOO - Drawdown Comparison

The maximum VSO.AX drawdown since its inception was -40.60%, roughly equal to the maximum IOO drawdown of -40.52%. Use the drawdown chart below to compare losses from any high point for VSO.AX and IOO.

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Drawdown Indicators

VSO.AXIOODifference

Max Drawdown

Largest peak-to-trough decline

-40.60%

-55.85%

+15.25%

Max Drawdown (1Y)

Largest decline over 1 year

-16.81%

-12.40%

-4.41%

Max Drawdown (5Y)

Largest decline over 5 years

-23.53%

-23.52%

-0.01%

Max Drawdown (10Y)

Largest decline over 10 years

-40.60%

-31.43%

-9.17%

Current Drawdown

Current decline from peak

-11.55%

-5.98%

-5.57%

Average Drawdown

Average peak-to-trough decline

-6.35%

-11.34%

+4.99%

Ulcer Index

Depth and duration of drawdowns from previous peaks

4.57%

2.63%

+1.94%

Volatility

VSO.AX vs. IOO - Volatility Comparison

Vanguard MSCI Australian Small Companies INDEX ETF (VSO.AX) has a higher volatility of 8.37% compared to iShares Global 100 ETF (IOO) at 4.85%. This indicates that VSO.AX'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.

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Volatility by Period

VSO.AXIOODifference

Volatility (1M)

Calculated over the trailing 1-month period

8.37%

4.85%

+3.52%

Volatility (6M)

Calculated over the trailing 6-month period

13.64%

8.76%

+4.88%

Volatility (1Y)

Calculated over the trailing 1-year period

17.78%

16.68%

+1.10%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

16.11%

14.43%

+1.68%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

16.81%

15.83%

+0.98%