VOO vs. IAUM
VOO (Vanguard S&P 500 ETF) and IAUM (iShares Gold Trust Micro) are both exchange-traded funds - VOO is a S&P 500 fund tracking the S&P 500 Index, while IAUM is a Gold fund tracking the LBMA Gold Price PM. Both are passively managed. Over the past 5 years, VOO returned 13.03%/yr vs 17.63%/yr for IAUM. At a 0.12 correlation, their price movements are largely independent. VOO charges 0.03%/yr vs 0.09%/yr for IAUM.
Performance
VOO vs. IAUM - Performance Comparison
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Returns By Period
In the year-to-date period, VOO achieves a 9.97% return, which is significantly higher than IAUM's -6.35% return.
VOO
- 1D
- -0.20%
- 1M
- -1.41%
- YTD
- 9.97%
- 6M
- 9.97%
- 1Y
- 22.15%
- 3Y*
- 20.52%
- 5Y*
- 13.03%
- 10Y*
- 15.43%
IAUM
- 1D
- 0.62%
- 1M
- -9.81%
- YTD
- -6.35%
- 6M
- -6.35%
- 1Y
- 20.94%
- 3Y*
- 28.04%
- 5Y*
- 17.63%
- 10Y*
- —
VOO vs. IAUM - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | |
|---|---|---|---|---|---|---|
VOO Vanguard S&P 500 ETF | 9.97% | 17.82% | 24.98% | 26.32% | -18.17% | 11.86% |
IAUM iShares Gold Trust Micro | -6.35% | 64.27% | 27.04% | 13.12% | -0.49% | 3.87% |
Correlation
The correlation between VOO and IAUM is 0.27, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.27 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.17 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.12 |
Correlation (All Time) Calculated using the full available price history since Jun 29, 2021 | 0.12 |
The correlation between VOO and IAUM shifts across timeframes, from 0.12 (5 years) to 0.27 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
VOO vs. IAUM — Risk / Return Rank
VOO
IAUM
VOO vs. IAUM - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P 500 ETF (VOO) and iShares Gold Trust Micro (IAUM). 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.
| VOO | IAUM | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.01 | ||
| Sortino ratioReturn per unit of downside risk | +1.33 | ||
| Omega ratioGain probability vs. loss probability | 1.32 | 1.16 | +0.16 |
| Calmar ratioReturn relative to maximum drawdown | 2.50 | 0.80 | +1.70 |
| Martin ratioReturn relative to average drawdown | 10.95 | 2.13 | +8.82 |
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Drawdowns
VOO vs. IAUM - Drawdown Comparison
The maximum VOO drawdown since its inception was -33.99%, which is greater than IAUM's maximum drawdown of -26.14%. Use the drawdown chart below to compare losses from any high point for VOO and IAUM.
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Drawdown Indicators
| VOO | IAUM | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -33.99% | -26.14% | -7.85% |
Max Drawdown (1Y)Largest decline over 1 year | -8.90% | -26.14% | +17.24% |
Max Drawdown (3Y)Largest decline over 3 years | -18.69% | -26.14% | +7.45% |
Max Drawdown (5Y)Largest decline over 5 years | -24.52% | -26.14% | +1.62% |
Max Drawdown (10Y)Largest decline over 10 years | -33.99% | — | — |
Current DrawdownCurrent decline from peak | -1.55% | -25.15% | +23.60% |
Average DrawdownAverage peak-to-trough decline | -3.68% | -5.56% | +1.88% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.03% | 9.87% | -7.84% |
Volatility
VOO vs. IAUM - Volatility Comparison
The current volatility for Vanguard S&P 500 ETF (VOO) is 5.09%, while iShares Gold Trust Micro (IAUM) has a volatility of 8.56%. This indicates that VOO experiences smaller price fluctuations and is considered to be less risky than IAUM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VOO | IAUM | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.09% | 8.56% | -3.47% |
Volatility (6M)Calculated over the trailing 6-month period | 9.92% | 23.80% | -13.88% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.49% | 27.39% | -14.90% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.93% | 18.16% | -1.23% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.00% | 18.14% | -0.14% |
VOO vs. IAUM - Expense Ratio Comparison
VOO has a 0.03% expense ratio, which is lower than IAUM's 0.09% expense ratio. Despite the difference, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
VOO vs. IAUM - Dividend Comparison
VOO's dividend yield for the trailing twelve months is around 1.07%, while IAUM has not paid dividends to shareholders.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IAUM iShares Gold Trust Micro | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
VOO Vanguard S&P 500 ETF | 1.07% | 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
VOO and IAUM have a correlation of 0.27, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IAUM has higher volatility (8.56%) compared to VOO (5.09%). In terms of maximum drawdown, VOO dropped -33.99% vs IAUM's -26.14%.
On 5-year performance, IAUM leads with 17.63% vs 13.03% for VOO. On fees, VOO is cheaper at 0.03% per year. On volatility, VOO has been the lower-risk option at 5.09%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, IAUM has performed better with a 17.63% return vs 13.03%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
VOO is cheaper with a 0.03% expense ratio, compared with 0.09% for IAUM.
VOO has the higher dividend yield at 1.07%, compared with 0.00% for IAUM.
VOO is categorized as S&P 500, while IAUM is Gold. VOO tracks S&P 500 Index, while IAUM tracks LBMA Gold Price PM. They also come from different issuers: Vanguard and iShares. Their fees differ too: 0.03% for VOO and 0.09% for IAUM.
VOO currently has the higher Sharpe Ratio (1.78 vs 0.77), 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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