VBMFX vs. VSIGX
VBMFX (Vanguard Total Bond Market Index Fund Investor Shares) and VSIGX (Vanguard Intermediate-Term Treasury Index Fund Admiral Shares) are both mutual funds - VBMFX is a Intermediate Core Bond fund tracking the Bloomberg U.S. Aggregate Float Adjusted Bond Index, while VSIGX is a Government Bonds fund tracking the Bloomberg U.S. Treasury 3–10 Year Bond Index. Both are passively managed. Over the past 10 years, VBMFX returned 1.18%/yr vs 1.10%/yr for VSIGX. Their correlation of 0.92 means they have usually moved in the same direction. VBMFX charges 0.15%/yr vs 0.06%/yr for VSIGX.
Performance
VBMFX vs. VSIGX - Performance Comparison
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Returns By Period
In the year-to-date period, VBMFX achieves a -0.76% return, which is significantly lower than VSIGX's -0.61% return. Over the past 10 years, VBMFX has outperformed VSIGX with an annualized return of 1.18%, while VSIGX has yielded a comparatively lower 1.10% annualized return.
VBMFX
- 1D
- 0.00%
- 1M
- -1.25%
- 6M
- -0.98%
- YTD
- -0.76%
- 1Y
- 1.56%
- 3Y*
- 3.58%
- 5Y*
- -0.55%
- 10Y*
- 1.18%
- ALL TIME*
- 4.28%
VSIGX
- 1D
- 0.10%
- 1M
- -0.40%
- 6M
- -0.51%
- YTD
- -0.61%
- 1Y
- 1.36%
- 3Y*
- 3.77%
- 5Y*
- -0.17%
- 10Y*
- 1.10%
- ALL TIME*
- 2.16%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
VBMFX vs. VSIGX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VBMFX Vanguard Total Bond Market Index Fund Investor Shares | -0.76% | 7.05% | 1.15% | 5.62% | -13.25% | -2.04% | 7.63% | 8.61% | -0.34% | 3.45% |
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | -0.61% | 7.36% | 1.65% | 4.39% | -10.69% | -2.60% | 7.65% | 6.26% | 1.35% | 1.58% |
Correlation
The correlation between VBMFX and VSIGX is 0.90, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.90 |
Correlation (3Y) Balances recent behavior with more history. | 0.94 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.95 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.92 |
Correlation (All Time) Calculated using the full available price history since Nov 23, 2009 | 0.92 |
The correlation between VBMFX and VSIGX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.
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Return for Risk
VBMFX vs. VSIGX — Risk / Return Rank
VBMFX
VSIGX
VBMFX vs. VSIGX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) and Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX). 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.
| VBMFX | VSIGX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.02 | ||
| Sortino ratioReturn per unit of downside risk | +0.01 | ||
| Omega ratioGain probability vs. loss probability | 1.13 | 1.12 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 0.95 | 0.82 | +0.12 |
| Martin ratioReturn relative to average drawdown | 2.35 | 1.92 | +0.43 |
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Drawdowns
VBMFX vs. VSIGX - Drawdown Comparison
The maximum VBMFX drawdown since its inception was -19.08%, which is greater than VSIGX's maximum drawdown of -16.15%. Use the drawdown chart below to compare losses from any high point for VBMFX and VSIGX.
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Drawdown Indicators
| VBMFX | VSIGX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.08% | -16.15% | -2.93% |
Max Drawdown (1Y)Largest decline over 1 year | -2.91% | -2.86% | -0.05% |
Max Drawdown (3Y)Largest decline over 3 years | -4.88% | -4.08% | -0.80% |
Max Drawdown (5Y)Largest decline over 5 years | -18.24% | -15.07% | -3.17% |
Max Drawdown (10Y)Largest decline over 10 years | -19.08% | -16.15% | -2.93% |
Current DrawdownCurrent decline from peak | -4.00% | -2.34% | -1.66% |
Average DrawdownAverage peak-to-trough decline | -2.70% | -3.49% | +0.79% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.17% | 1.22% | -0.05% |
Volatility
VBMFX vs. VSIGX - Volatility Comparison
Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) has a higher volatility of 0.96% compared to Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) at 0.87%. This indicates that VBMFX's price experiences larger fluctuations and is considered to be riskier than VSIGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VBMFX | VSIGX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.96% | 0.87% | +0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 2.96% | 2.62% | +0.34% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.82% | 3.36% | +0.46% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.01% | 5.34% | +0.67% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.97% | 4.44% | +0.53% |
VBMFX vs. VSIGX - Expense Ratio Comparison
VBMFX has a 0.15% expense ratio, which is higher than VSIGX's 0.06% 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
VBMFX vs. VSIGX - Dividend Comparison
VBMFX's dividend yield for the trailing twelve months is around 3.61%, more than VSIGX's 3.53% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VBMFX Vanguard Total Bond Market Index Fund Investor Shares | 3.61% | 3.76% | 3.57% | 2.99% | 2.49% | 1.72% | 2.31% | 2.63% | 2.47% | 2.45% | 2.43% | 2.71% |
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | 3.53% | 3.76% | 3.95% | 2.70% | 1.71% | 1.66% | 2.21% | 2.21% | 2.05% | 1.67% | 1.56% | 1.70% |
Frequently Asked Questions
With a correlation of 0.90, VBMFX and VSIGX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
VBMFX has higher volatility (0.96%) compared to VSIGX (0.87%). In terms of maximum drawdown, VBMFX dropped -19.08% vs VSIGX's -16.15%.
VBMFX currently has the higher Sharpe Ratio (0.72 vs 0.70), 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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