VMGMX vs. BSPIX
VMGMX (Vanguard Mid-Cap Growth Index Fund Admiral Shares) and BSPIX (iShares S&P 500 Index Fund Institutional Class) are both mutual funds - VMGMX is a Mid Cap Growth Equities fund managed by Vanguard, while BSPIX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, VMGMX returned 12.27%/yr vs 15.46%/yr for BSPIX. Their correlation of 0.90 suggests significant overlap in exposure. VMGMX charges 0.07%/yr vs 0.10%/yr for BSPIX.
Performance
VMGMX vs. BSPIX - Performance Comparison
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Returns By Period
In the year-to-date period, VMGMX achieves a 9.27% return, which is significantly lower than BSPIX's 11.65% return. Over the past 10 years, VMGMX has underperformed BSPIX with an annualized return of 12.27%, while BSPIX has yielded a comparatively higher 15.46% annualized return.
VMGMX
- 1D
- 0.96%
- 1M
- 6.48%
- YTD
- 9.27%
- 6M
- 7.33%
- 1Y
- 12.39%
- 3Y*
- 16.56%
- 5Y*
- 7.31%
- 10Y*
- 12.27%
BSPIX
- 1D
- 0.13%
- 1M
- 5.79%
- YTD
- 11.65%
- 6M
- 11.68%
- 1Y
- 28.84%
- 3Y*
- 22.63%
- 5Y*
- 14.17%
- 10Y*
- 15.46%
VMGMX vs. BSPIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VMGMX Vanguard Mid-Cap Growth Index Fund Admiral Shares | 9.27% | 10.69% | 15.65% | 23.93% | -28.84% | 20.48% | 34.45% | 33.85% | -5.61% | 21.83% |
BSPIX iShares S&P 500 Index Fund Institutional Class | 11.65% | 17.75% | 24.85% | 26.17% | -18.20% | 28.55% | 18.35% | 31.35% | -4.87% | 21.20% |
Correlation
The correlation between VMGMX and BSPIX is 0.83, 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 | 0.83 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.87 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.89 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.89 |
Correlation (All Time) Calculated using the full available price history since Jan 3, 2014 | 0.90 |
The correlation between VMGMX and BSPIX has been stable across timeframes, ranging from 0.83 to 0.90 - a consistent structural relationship.
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Return for Risk
VMGMX vs. BSPIX — Risk / Return Rank
VMGMX
BSPIX
VMGMX vs. BSPIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Mid-Cap Growth Index Fund Admiral Shares (VMGMX) and iShares S&P 500 Index Fund Institutional Class (BSPIX). 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.
| VMGMX | BSPIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.65 | ||
| Sortino ratioReturn per unit of downside risk | -2.13 | ||
| Omega ratioGain probability vs. loss probability | 1.15 | 1.46 | -0.30 |
| Calmar ratioReturn relative to maximum drawdown | 0.85 | 3.34 | -2.48 |
| Martin ratioReturn relative to average drawdown | 2.56 | 15.58 | -13.02 |
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
| VMGMX | BSPIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.86 | 2.51 | -1.65 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.34 | 0.84 | -0.50 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.59 | 0.86 | -0.27 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.65 | 0.81 | -0.16 |
Drawdowns
VMGMX vs. BSPIX - Drawdown Comparison
The maximum VMGMX drawdown since its inception was -37.17%, which is greater than BSPIX's maximum drawdown of -33.75%. Use the drawdown chart below to compare losses from any high point for VMGMX and BSPIX.
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Drawdown Indicators
| VMGMX | BSPIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -37.17% | -33.75% | -3.42% |
Max Drawdown (1Y)Largest decline over 1 year | -15.95% | -8.91% | -7.04% |
Max Drawdown (3Y)Largest decline over 3 years | -21.65% | -18.74% | -2.91% |
Max Drawdown (5Y)Largest decline over 5 years | -37.17% | -24.55% | -12.62% |
Max Drawdown (10Y)Largest decline over 10 years | -37.17% | -33.75% | -3.42% |
Current DrawdownCurrent decline from peak | 0.00% | 0.00% | 0.00% |
Average DrawdownAverage peak-to-trough decline | -7.02% | -3.93% | -3.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 5.31% | 1.90% | +3.41% |
Volatility
VMGMX vs. BSPIX - Volatility Comparison
Vanguard Mid-Cap Growth Index Fund Admiral Shares (VMGMX) has a higher volatility of 4.27% compared to iShares S&P 500 Index Fund Institutional Class (BSPIX) at 2.83%. This indicates that VMGMX's price experiences larger fluctuations and is considered to be riskier than BSPIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VMGMX | BSPIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.27% | 2.83% | +1.44% |
Volatility (6M)Calculated over the trailing 6-month period | 12.46% | 8.97% | +3.49% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.90% | 11.85% | +4.05% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 21.42% | 16.88% | +4.54% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.99% | 18.03% | +2.96% |
VMGMX vs. BSPIX - Expense Ratio Comparison
VMGMX has a 0.07% expense ratio, which is lower than BSPIX's 0.10% 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
VMGMX vs. BSPIX - Dividend Comparison
VMGMX's dividend yield for the trailing twelve months is around 0.60%, less than BSPIX's 1.50% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
BSPIX iShares S&P 500 Index Fund Institutional Class | 1.50% | 1.66% | 1.35% | 1.44% | 1.94% | 1.76% | 1.60% | 1.92% | 1.94% | 1.57% | 2.30% | 2.42% |
VMGMX Vanguard Mid-Cap Growth Index Fund Admiral Shares | 0.60% | 0.64% | 0.67% | 0.71% | 0.78% | 0.34% | 0.56% | 0.78% | 0.84% | 0.72% | 0.81% | 0.82% |
Frequently Asked Questions
VMGMX and BSPIX have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VMGMX has higher volatility (4.27%) compared to BSPIX (2.83%). In terms of maximum drawdown, VMGMX dropped -37.17% vs BSPIX's -33.75%.
BSPIX currently has the higher Sharpe Ratio (2.51 vs 0.86), 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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