VMIAX vs. VBTLX
VMIAX (Vanguard Materials Index Fund Admiral Shares) and VBTLX (Vanguard Total Bond Market Index Fund Admiral Shares) are both mutual funds - VMIAX is a Materials fund managed by Vanguard, while VBTLX is a Total Bond Market fund tracking the Bloomberg U.S. Aggregate Float Adjusted Index. Over the past 10 years, VMIAX returned 10.36%/yr vs 1.58%/yr for VBTLX. At a correlation of -0.16, they often move in opposite directions. VMIAX charges 0.10%/yr vs 0.04%/yr for VBTLX.
Performance
VMIAX vs. VBTLX - Performance Comparison
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Returns By Period
In the year-to-date period, VMIAX achieves a 13.48% return, which is significantly higher than VBTLX's 0.42% return. Over the past 10 years, VMIAX has outperformed VBTLX with an annualized return of 10.36%, while VBTLX has yielded a comparatively lower 1.58% annualized return.
VMIAX
- 1D
- 1.31%
- 1M
- 2.84%
- YTD
- 13.48%
- 6M
- 16.50%
- 1Y
- 23.03%
- 3Y*
- 12.54%
- 5Y*
- 5.88%
- 10Y*
- 10.36%
VBTLX
- 1D
- 0.00%
- 1M
- 0.55%
- YTD
- 0.42%
- 6M
- 0.35%
- 1Y
- 5.34%
- 3Y*
- 4.05%
- 5Y*
- 0.21%
- 10Y*
- 1.58%
VMIAX vs. VBTLX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VMIAX Vanguard Materials Index Fund Admiral Shares | 13.48% | 12.26% | 0.45% | 13.69% | -11.77% | 27.15% | 19.37% | 23.59% | -17.38% | 23.68% |
VBTLX Vanguard Total Bond Market Index Fund Admiral Shares | 0.42% | 7.17% | 1.26% | 5.74% | -13.16% | -1.81% | 7.72% | 8.73% | -0.25% | 3.56% |
Correlation
The correlation between VMIAX and VBTLX is 0.30, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.30 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.24 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.14 |
Correlation (10Y) Calculated over the trailing 10-year period | -0.03 |
Correlation (All Time) Calculated using the full available price history since Feb 3, 2004 | -0.16 |
The correlation between VMIAX and VBTLX shifts across timeframes, from -0.16 (all time) to 0.30 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
VMIAX vs. VBTLX — Risk / Return Rank
VMIAX
VBTLX
VMIAX vs. VBTLX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Materials Index Fund Admiral Shares (VMIAX) and Vanguard Total Bond Market Index Fund Admiral Shares (VBTLX). 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.
| VMIAX | VBTLX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.03 | ||
| Sortino ratioReturn per unit of downside risk | -0.06 | ||
| Omega ratioGain probability vs. loss probability | 1.24 | 1.24 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.83 | 1.86 | -0.03 |
| Martin ratioReturn relative to average drawdown | 5.98 | 5.58 | +0.40 |
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
| VMIAX | VBTLX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.39 | 1.36 | +0.03 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.30 | 0.04 | +0.27 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.49 | 0.32 | +0.17 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.39 | 0.76 | -0.37 |
Drawdowns
VMIAX vs. VBTLX - Drawdown Comparison
The maximum VMIAX drawdown since its inception was -62.17%, which is greater than VBTLX's maximum drawdown of -18.81%. Use the drawdown chart below to compare losses from any high point for VMIAX and VBTLX.
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Drawdown Indicators
| VMIAX | VBTLX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -62.17% | -18.81% | -43.36% |
Max Drawdown (1Y)Largest decline over 1 year | -13.41% | -2.89% | -10.52% |
Max Drawdown (3Y)Largest decline over 3 years | -23.21% | -6.00% | -17.21% |
Max Drawdown (5Y)Largest decline over 5 years | -25.45% | -18.14% | -7.31% |
Max Drawdown (10Y)Largest decline over 10 years | -41.02% | -18.81% | -22.21% |
Current DrawdownCurrent decline from peak | -3.53% | -2.18% | -1.35% |
Average DrawdownAverage peak-to-trough decline | -9.63% | -2.67% | -6.96% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 4.08% | 0.96% | +3.12% |
Volatility
VMIAX vs. VBTLX - Volatility Comparison
Vanguard Materials Index Fund Admiral Shares (VMIAX) has a higher volatility of 6.36% compared to Vanguard Total Bond Market Index Fund Admiral Shares (VBTLX) at 1.38%. This indicates that VMIAX's price experiences larger fluctuations and is considered to be riskier than VBTLX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VMIAX | VBTLX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.36% | 1.38% | +4.98% |
Volatility (6M)Calculated over the trailing 6-month period | 13.89% | 2.80% | +11.09% |
Volatility (1Y)Calculated over the trailing 1-year period | 17.66% | 3.97% | +13.69% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 19.67% | 6.01% | +13.66% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 21.23% | 4.98% | +16.25% |
VMIAX vs. VBTLX - Expense Ratio Comparison
VMIAX has a 0.10% expense ratio, which is higher than VBTLX's 0.04% 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%.
Dividends
VMIAX vs. VBTLX - Dividend Comparison
VMIAX's dividend yield for the trailing twelve months is around 1.36%, less than VBTLX's 3.98% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VBTLX Vanguard Total Bond Market Index Fund Admiral Shares | 3.98% | 3.87% | 3.69% | 3.10% | 2.59% | 1.96% | 2.39% | 2.74% | 2.57% | 2.56% | 2.53% | 2.82% |
VMIAX Vanguard Materials Index Fund Admiral Shares | 1.36% | 1.55% | 1.70% | 1.72% | 1.98% | 1.33% | 1.67% | 1.94% | 2.02% | 1.63% | 1.73% | 2.31% |
Frequently Asked Questions
VMIAX and VBTLX have a correlation of 0.30, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VMIAX has higher volatility (6.36%) compared to VBTLX (1.38%). In terms of maximum drawdown, VMIAX dropped -62.17% vs VBTLX's -18.81%.
VMIAX currently has the higher Sharpe Ratio (1.39 vs 1.36), 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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