VMGIX vs. VIIIX
Compare and contrast key facts about Vanguard Mid-Cap Growth Index Fund (VMGIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX).
VMGIX is managed by Vanguard. It was launched on Aug 17, 2006. VIIIX is managed by Vanguard. It was launched on Jul 7, 1997.
Performance
VMGIX vs. VIIIX - Performance Comparison
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VMGIX vs. VIIIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VMGIX Vanguard Mid-Cap Growth Index Fund | -10.45% | 10.56% | 15.51% | 23.79% | -28.93% | 20.32% | 34.30% | 33.69% | -5.73% | 21.72% |
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares | -7.06% | 17.87% | 26.29% | 25.79% | -18.14% | 28.69% | 18.41% | 31.48% | -4.41% | 21.82% |
Returns By Period
In the year-to-date period, VMGIX achieves a -10.45% return, which is significantly lower than VIIIX's -7.06% return. Over the past 10 years, VMGIX has underperformed VIIIX with an annualized return of 10.15%, while VIIIX has yielded a comparatively higher 13.82% annualized return.
VMGIX
- 1D
- -1.10%
- 1M
- -10.27%
- YTD
- -10.45%
- 6M
- -14.74%
- 1Y
- 2.58%
- 3Y*
- 9.20%
- 5Y*
- 3.65%
- 10Y*
- 10.15%
VIIIX
- 1D
- -0.39%
- 1M
- -7.68%
- YTD
- -7.06%
- 6M
- -4.59%
- 1Y
- 14.44%
- 3Y*
- 17.57%
- 5Y*
- 11.54%
- 10Y*
- 13.82%
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VMGIX vs. VIIIX - Expense Ratio Comparison
VMGIX has a 0.19% expense ratio, which is higher than VIIIX's 0.02% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Return for Risk
VMGIX vs. VIIIX — Risk / Return Rank
VMGIX
VIIIX
VMGIX vs. VIIIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Mid-Cap Growth Index Fund (VMGIX) and Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX). 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.
| VMGIX | VIIIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.14 | 0.84 | -0.70 |
Sortino ratioReturn per unit of downside risk | 0.34 | 1.30 | -0.96 |
Omega ratioGain probability vs. loss probability | 1.05 | 1.20 | -0.15 |
Calmar ratioReturn relative to maximum drawdown | 0.05 | 1.06 | -1.01 |
Martin ratioReturn relative to average drawdown | 0.16 | 5.14 | -4.98 |
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
| VMGIX | VIIIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.14 | 0.84 | -0.70 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.17 | 0.69 | -0.52 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.49 | 0.77 | -0.28 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.40 | 0.46 | -0.06 |
Correlation
The correlation between VMGIX and VIIIX is 0.91, 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
VMGIX vs. VIIIX - Dividend Comparison
VMGIX's dividend yield for the trailing twelve months is around 0.60%, less than VIIIX's 2.90% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VMGIX Vanguard Mid-Cap Growth Index Fund | 0.60% | 0.52% | 0.56% | 0.60% | 0.64% | 0.23% | 0.46% | 0.67% | 0.70% | 0.61% | 0.70% | 0.69% |
VIIIX Vanguard Institutional Index Fund Institutional Plus Shares | 2.90% | 2.11% | 3.66% | 2.66% | 3.39% | 4.79% | 3.07% | 2.86% | 2.45% | 1.84% | 2.38% | 2.47% |
Drawdowns
VMGIX vs. VIIIX - Drawdown Comparison
The maximum VMGIX drawdown since its inception was -60.20%, which is greater than VIIIX's maximum drawdown of -55.18%. Use the drawdown chart below to compare losses from any high point for VMGIX and VIIIX.
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Drawdown Indicators
| VMGIX | VIIIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -60.20% | -55.18% | -5.02% |
Max Drawdown (1Y)Largest decline over 1 year | -15.99% | -12.12% | -3.87% |
Max Drawdown (5Y)Largest decline over 5 years | -37.25% | -24.50% | -12.75% |
Max Drawdown (10Y)Largest decline over 10 years | -37.25% | -33.79% | -3.46% |
Current DrawdownCurrent decline from peak | -15.99% | -8.90% | -7.09% |
Average DrawdownAverage peak-to-trough decline | -10.06% | -10.07% | +0.01% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.05% | 2.49% | +2.56% |
Volatility
VMGIX vs. VIIIX - Volatility Comparison
Vanguard Mid-Cap Growth Index Fund (VMGIX) has a higher volatility of 5.38% compared to Vanguard Institutional Index Fund Institutional Plus Shares (VIIIX) at 4.24%. This indicates that VMGIX's price experiences larger fluctuations and is considered to be riskier than VIIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VMGIX | VIIIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.38% | 4.24% | +1.14% |
Volatility (6M)Calculated over the trailing 6-month period | 12.04% | 9.08% | +2.96% |
Volatility (1Y)Calculated over the trailing 1-year period | 20.88% | 18.13% | +2.75% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.36% | 16.85% | +4.51% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.91% | 18.02% | +2.89% |