VIOO vs. IWC
Compare and contrast key facts about Vanguard S&P Small-Cap 600 ETF (VIOO) and iShares Microcap ETF (IWC).
VIOO and IWC are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. VIOO is a passively managed fund by Vanguard that tracks the performance of the S&P SmallCap 600 Index. It was launched on Sep 7, 2010. IWC is a passively managed fund by iShares that tracks the performance of the Russell Microcap Index. It was launched on Aug 12, 2005. Both VIOO and IWC 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
VIOO vs. IWC - Performance Comparison
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VIOO vs. IWC - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VIOO Vanguard S&P Small-Cap 600 ETF | 4.04% | 6.04% | 8.48% | 16.16% | -16.26% | 26.79% | 11.47% | 22.68% | -8.65% | 13.16% |
IWC iShares Microcap ETF | 1.99% | 22.45% | 13.63% | 8.99% | -21.93% | 18.67% | 20.88% | 22.20% | -13.13% | 12.79% |
Returns By Period
In the year-to-date period, VIOO achieves a 4.04% return, which is significantly higher than IWC's 1.99% return. Both investments have delivered pretty close results over the past 10 years, with VIOO having a 9.90% annualized return and IWC not far ahead at 10.15%.
VIOO
- 1D
- 0.53%
- 1M
- -4.14%
- YTD
- 4.04%
- 6M
- 5.50%
- 1Y
- 20.96%
- 3Y*
- 10.70%
- 5Y*
- 4.20%
- 10Y*
- 9.90%
IWC
- 1D
- 0.61%
- 1M
- -5.48%
- YTD
- 1.99%
- 6M
- 8.14%
- 1Y
- 46.56%
- 3Y*
- 16.75%
- 5Y*
- 2.65%
- 10Y*
- 10.15%
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VIOO vs. IWC - Expense Ratio Comparison
VIOO has a 0.10% expense ratio, which is lower than IWC's 0.60% expense ratio.
Return for Risk
VIOO vs. IWC — Risk / Return Rank
VIOO
IWC
VIOO vs. IWC - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P Small-Cap 600 ETF (VIOO) and iShares Microcap ETF (IWC). 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.
| VIOO | IWC | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.93 | 1.78 | -0.85 |
Sortino ratioReturn per unit of downside risk | 1.43 | 2.42 | -0.98 |
Omega ratioGain probability vs. loss probability | 1.19 | 1.30 | -0.11 |
Calmar ratioReturn relative to maximum drawdown | 1.45 | 3.48 | -2.03 |
Martin ratioReturn relative to average drawdown | 5.76 | 11.21 | -5.45 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| VIOO | IWC | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.93 | 1.78 | -0.85 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.20 | 0.11 | +0.09 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.43 | 0.42 | +0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.54 | 0.28 | +0.26 |
Correlation
The correlation between VIOO and IWC is 0.90, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
VIOO vs. IWC - Dividend Comparison
VIOO's dividend yield for the trailing twelve months is around 1.31%, more than IWC's 1.06% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VIOO Vanguard S&P Small-Cap 600 ETF | 1.31% | 1.36% | 1.48% | 1.47% | 1.51% | 1.16% | 1.09% | 1.37% | 1.32% | 1.11% | 1.06% | 1.26% |
IWC iShares Microcap ETF | 1.06% | 1.10% | 1.06% | 1.17% | 1.18% | 0.78% | 0.98% | 1.19% | 1.01% | 1.09% | 1.16% | 1.49% |
Drawdowns
VIOO vs. IWC - Drawdown Comparison
The maximum VIOO drawdown since its inception was -44.15%, smaller than the maximum IWC drawdown of -64.61%. Use the drawdown chart below to compare losses from any high point for VIOO and IWC.
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Drawdown Indicators
| VIOO | IWC | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -44.15% | -64.61% | +20.46% |
Max Drawdown (1Y)Largest decline over 1 year | -14.66% | -13.35% | -1.31% |
Max Drawdown (5Y)Largest decline over 5 years | -27.93% | -40.68% | +12.75% |
Max Drawdown (10Y)Largest decline over 10 years | -44.15% | -47.21% | +3.06% |
Current DrawdownCurrent decline from peak | -5.30% | -8.27% | +2.97% |
Average DrawdownAverage peak-to-trough decline | -7.40% | -15.39% | +7.99% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.68% | 4.14% | -0.46% |
Volatility
VIOO vs. IWC - Volatility Comparison
The current volatility for Vanguard S&P Small-Cap 600 ETF (VIOO) is 6.32%, while iShares Microcap ETF (IWC) has a volatility of 8.93%. This indicates that VIOO experiences smaller price fluctuations and is considered to be less risky than IWC based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VIOO | IWC | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.32% | 8.93% | -2.61% |
Volatility (6M)Calculated over the trailing 6-month period | 13.11% | 18.07% | -4.96% |
Volatility (1Y)Calculated over the trailing 1-year period | 22.67% | 26.30% | -3.63% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.50% | 24.40% | -2.90% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.98% | 24.30% | -1.32% |