VSIGX vs. VBMFX
VSIGX (Vanguard Intermediate-Term Treasury Index Fund Admiral Shares) and VBMFX (Vanguard Total Bond Market Index Fund Investor Shares) are both mutual funds - VSIGX is a Government Bonds fund tracking the Bloomberg U.S. Treasury 3–10 Year Bond Index, while VBMFX is a Intermediate Core Bond fund tracking the Bloomberg U.S. Aggregate Float Adjusted Bond Index. Both are passively managed. Over the past 10 years, VSIGX returned 1.10%/yr vs 1.18%/yr for VBMFX. Their correlation of 0.92 means they have usually moved in the same direction. VSIGX charges 0.06%/yr vs 0.15%/yr for VBMFX.
Performance
VSIGX vs. VBMFX - Performance Comparison
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Returns By Period
In the year-to-date period, VSIGX achieves a -0.61% return, which is significantly higher than VBMFX's -0.76% return. Over the past 10 years, VSIGX has underperformed VBMFX with an annualized return of 1.10%, while VBMFX has yielded a comparatively higher 1.18% annualized return.
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%
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%
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 |
VSIGX vs. VBMFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
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% |
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% |
Correlation
The correlation between VSIGX and VBMFX 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 VSIGX and VBMFX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.
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Return for Risk
VSIGX vs. VBMFX — Risk / Return Rank
VSIGX
VBMFX
VSIGX vs. VBMFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) and Vanguard Total Bond Market Index Fund Investor Shares (VBMFX). 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.
| VSIGX | VBMFX | 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 | 1.12 | 1.13 | 0.00 |
| Calmar ratioReturn relative to maximum drawdown | 0.82 | 0.95 | -0.12 |
| Martin ratioReturn relative to average drawdown | 1.92 | 2.35 | -0.43 |
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Drawdowns
VSIGX vs. VBMFX - Drawdown Comparison
The maximum VSIGX drawdown since its inception was -16.15%, smaller than the maximum VBMFX drawdown of -19.08%. Use the drawdown chart below to compare losses from any high point for VSIGX and VBMFX.
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Drawdown Indicators
| VSIGX | VBMFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -16.15% | -19.08% | +2.93% |
Max Drawdown (1Y)Largest decline over 1 year | -2.86% | -2.91% | +0.05% |
Max Drawdown (3Y)Largest decline over 3 years | -4.08% | -4.88% | +0.80% |
Max Drawdown (5Y)Largest decline over 5 years | -15.07% | -18.24% | +3.17% |
Max Drawdown (10Y)Largest decline over 10 years | -16.15% | -19.08% | +2.93% |
Current DrawdownCurrent decline from peak | -2.34% | -4.00% | +1.66% |
Average DrawdownAverage peak-to-trough decline | -3.49% | -2.70% | -0.79% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.22% | 1.17% | +0.05% |
Volatility
VSIGX vs. VBMFX - Volatility Comparison
The current volatility for Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) is 0.87%, while Vanguard Total Bond Market Index Fund Investor Shares (VBMFX) has a volatility of 0.96%. This indicates that VSIGX experiences smaller price fluctuations and is considered to be less risky than VBMFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VSIGX | VBMFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.87% | 0.96% | -0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 2.62% | 2.96% | -0.34% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.36% | 3.82% | -0.46% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.34% | 6.01% | -0.67% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.44% | 4.97% | -0.53% |
VSIGX vs. VBMFX - Expense Ratio Comparison
VSIGX has a 0.06% expense ratio, which is lower than VBMFX's 0.15% 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
VSIGX vs. VBMFX - Dividend Comparison
VSIGX's dividend yield for the trailing twelve months is around 3.53%, less than VBMFX's 3.61% 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, VSIGX and VBMFX 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, VSIGX dropped -16.15% vs VBMFX's -19.08%.
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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