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VGB.AX vs. IGB.AX
Performance
Return for Risk
Drawdowns
Volatility
Dividends

VGB.AX vs. IGB.AX

Last updated Jul 16, 2026
Documentation

VGB.AX (Vanguard Australian Government Bond Index ETF) and IGB.AX (iShares Treasury ETF) are both Government Bonds funds - VGB.AX tracks the Vanguard Australian Government Bond Index Index while IGB.AX tracks the iShares Treasury Index. Both are passively managed. Over the past 10 years, VGB.AX returned 0.93%/yr vs 0.98%/yr for IGB.AX. A 0.72 correlation means they provide meaningful diversification when combined.

Performance

VGB.AX vs. IGB.AX - Performance Comparison

The chart below illustrates the hypothetical performance of a A$10,000 investment in Vanguard Australian Government Bond Index ETF (VGB.AX) and iShares Treasury ETF (IGB.AX). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, VGB.AX achieves a 0.93% return, which is significantly lower than IGB.AX's 1.50% return. Over the past 10 years, VGB.AX has underperformed IGB.AX with an annualized return of 0.93%, while IGB.AX has yielded a comparatively higher 0.98% annualized return.

VGB.AX

1D
0.00%
1M
0.08%
6M
1.26%
YTD
0.93%
1Y
0.51%
3Y*
2.44%
5Y*
-0.92%
10Y*
0.93%

IGB.AX

1D
0.15%
1M
0.05%
6M
1.25%
YTD
1.50%
1Y
1.15%
3Y*
2.86%
5Y*
-0.71%
10Y*
0.98%
*Multi-year figures are annualized to reflect compound growth (CAGR)

VGB.AX vs. IGB.AX - Yearly Performance Comparison

2026 (YTD)202520242023202220212020201920182017
VGB.AX
Vanguard Australian Government Bond Index ETF		0.93%2.39%1.19%4.44%-10.45%-3.26%4.30%7.50%3.89%2.32%
IGB.AX
iShares Treasury ETF		1.50%2.62%1.90%3.88%-10.24%-3.27%3.68%7.38%4.73%2.37%

Correlation

The correlation between VGB.AX and IGB.AX is 0.88, 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

0.88

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

0.92

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

0.94

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

0.85

Correlation (All Time)
Calculated using the full available price history since Apr 24, 2012

0.72

The correlation between VGB.AX and IGB.AX shifts across timeframes, from 0.72 (all time) to 0.94 (5 years), reflecting how their relationship changes across market environments.

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Vanguard Australian Government Bond Index ETF

iShares Treasury ETF

Return for Risk

VGB.AX vs. IGB.AX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
VGB.AX
VGB.AX Risk / Return Rank: 1111
Overall Rank
VGB.AX Sharpe Ratio Rank: 1212
Sharpe Ratio Rank
VGB.AX Sortino Ratio Rank: 1010
Sortino Ratio Rank
VGB.AX Omega Ratio Rank: 1010
Omega Ratio Rank
VGB.AX Calmar Ratio Rank: 1111
Calmar Ratio Rank
VGB.AX Martin Ratio Rank: 1111
Martin Ratio Rank
IGB.AX
IGB.AX Risk / Return Rank: 1313
Overall Rank
IGB.AX Sharpe Ratio Rank: 1414
Sharpe Ratio Rank
IGB.AX Sortino Ratio Rank: 1212
Sortino Ratio Rank
IGB.AX Omega Ratio Rank: 1212
Omega Ratio Rank
IGB.AX Calmar Ratio Rank: 1313
Calmar Ratio Rank
IGB.AX Martin Ratio Rank: 1313
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.

VGB.AX vs. IGB.AX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard Australian Government Bond Index ETF (VGB.AX) and iShares Treasury ETF (IGB.AX). 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.

VGB.AXIGB.AXDifference
Sharpe ratioReturn per unit of total volatility
0.15
0.30

-0.14

Sortino ratioReturn per unit of downside risk
0.24
0.45

-0.21

Omega ratioGain probability vs. loss probability

1.03

1.05

-0.02

Calmar ratioReturn relative to maximum drawdown

0.13

0.31

-0.18

Martin ratioReturn relative to average drawdown

0.24

0.59

-0.35

VGB.AX vs. IGB.AX - Sharpe Ratio Comparison

The current VGB.AX Sharpe Ratio is 0.15, which is lower than the IGB.AX Sharpe Ratio of 0.30. The chart below compares the historical Sharpe Ratios of VGB.AX and IGB.AX, 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

VGB.AX vs. IGB.AX - Drawdown Comparison

The maximum VGB.AX drawdown since its inception was -16.56%, roughly equal to the maximum IGB.AX drawdown of -16.94%. Use the drawdown chart below to compare losses from any high point for VGB.AX and IGB.AX.

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Drawdown Indicators

VGB.AXIGB.AXDifference

Max Drawdown

Largest peak-to-trough decline

-16.56%

-16.94%

+0.38%

Max Drawdown (1Y)

Largest decline over 1 year

-4.83%

-3.87%

-0.96%

Max Drawdown (3Y)

Largest decline over 3 years

-4.83%

-3.92%

-0.91%

Max Drawdown (5Y)

Largest decline over 5 years

-15.82%

-16.01%

+0.19%

Max Drawdown (10Y)

Largest decline over 10 years

-16.56%

-16.94%

+0.38%

Current Drawdown

Current decline from peak

-6.49%

-5.71%

-0.78%

Average Drawdown

Average peak-to-trough decline

-4.48%

-4.44%

-0.04%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.55%

2.05%

+0.50%

Volatility

VGB.AX vs. IGB.AX - Volatility Comparison

The current volatility for Vanguard Australian Government Bond Index ETF (VGB.AX) is 0.69%, while iShares Treasury ETF (IGB.AX) has a volatility of 0.85%. This indicates that VGB.AX experiences smaller price fluctuations and is considered to be less risky than IGB.AX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

VGB.AXIGB.AXDifference

Volatility (1M)

Calculated over the trailing 1-month period

0.69%

0.85%

-0.16%

Volatility (6M)

Calculated over the trailing 6-month period

3.06%

2.91%

+0.15%

Volatility (1Y)

Calculated over the trailing 1-year period

3.93%

4.01%

-0.08%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

5.41%

5.40%

+0.01%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

4.66%

5.02%

-0.36%

Dividends

VGB.AX vs. IGB.AX - Dividend Comparison

VGB.AX's dividend yield for the trailing twelve months is around 2.32%, less than IGB.AX's 2.60% yield.

PositionTTM20252024202320222021202020192018201720162015
IGB.AX
iShares Treasury ETF		2.60%3.10%2.47%1.63%0.80%1.20%2.47%1.54%1.56%2.11%2.09%5.81%
VGB.AX
Vanguard Australian Government Bond Index ETF		2.32%3.32%1.14%1.00%0.50%2.10%2.94%1.95%2.04%1.83%1.90%1.94%

Frequently Asked Questions

VGB.AX and IGB.AX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

VGB.AX tracks Vanguard Australian Government Bond Index Index, while IGB.AX tracks iShares Treasury Index. They also come from different issuers: Vanguard and iShares.

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