VBIIX vs. VSIGX
VBIIX (Vanguard Intermediate-Term Bond Index Fund) and VSIGX (Vanguard Intermediate-Term Treasury Index Fund Admiral Shares) are both mutual funds - VBIIX is a Intermediate Core Bond fund managed by Vanguard, while VSIGX is a Government Bonds fund managed by Vanguard. Over the past 10 years, VBIIX returned 1.74%/yr vs 1.23%/yr for VSIGX. Their correlation of 0.95 suggests significant overlap in exposure. VBIIX charges 0.15%/yr vs 0.07%/yr for VSIGX.
Performance
VBIIX vs. VSIGX - Performance Comparison
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Returns By Period
In the year-to-date period, VBIIX achieves a -0.38% return, which is significantly higher than VSIGX's -0.48% return. Over the past 10 years, VBIIX has outperformed VSIGX with an annualized return of 1.74%, while VSIGX has yielded a comparatively lower 1.23% annualized return.
VBIIX
- 1D
- -0.29%
- 1M
- -0.12%
- YTD
- -0.38%
- 6M
- -0.31%
- 1Y
- 4.06%
- 3Y*
- 3.96%
- 5Y*
- 0.01%
- 10Y*
- 1.74%
VSIGX
- 1D
- -0.15%
- 1M
- -0.18%
- YTD
- -0.48%
- 6M
- -0.35%
- 1Y
- 3.06%
- 3Y*
- 3.50%
- 5Y*
- 0.09%
- 10Y*
- 1.23%
VBIIX vs. VSIGX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VBIIX Vanguard Intermediate-Term Bond Index Fund | -0.38% | 8.12% | 1.44% | 5.67% | -13.34% | -2.73% | 9.72% | 10.11% | -0.24% | 3.78% |
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | -0.48% | 7.36% | 1.65% | 4.39% | -10.69% | -2.60% | 7.65% | 6.26% | 1.35% | 1.58% |
Correlation
The correlation between VBIIX and VSIGX is 0.95, 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 | 0.95 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.96 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.97 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.95 |
Correlation (All Time) Calculated using the full available price history since Nov 24, 2009 | 0.95 |
The correlation between VBIIX and VSIGX has been stable across timeframes, ranging from 0.95 to 0.97 - a consistent structural relationship.
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Return for Risk
VBIIX vs. VSIGX — Risk / Return Rank
VBIIX
VSIGX
VBIIX vs. VSIGX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Intermediate-Term Bond Index Fund (VBIIX) 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.
| VBIIX | VSIGX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.06 | ||
| Sortino ratioReturn per unit of downside risk | +0.09 | ||
| Omega ratioGain probability vs. loss probability | 1.20 | 1.18 | +0.01 |
| Calmar ratioReturn relative to maximum drawdown | 1.36 | 1.24 | +0.12 |
| Martin ratioReturn relative to average drawdown | 4.09 | 3.73 | +0.36 |
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
| VBIIX | VSIGX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.12 | 1.05 | +0.06 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.00 | 0.02 | -0.02 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.33 | 0.28 | +0.05 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.83 | 0.50 | +0.33 |
Drawdowns
VBIIX vs. VSIGX - Drawdown Comparison
The maximum VBIIX drawdown since its inception was -19.32%, which is greater than VSIGX's maximum drawdown of -16.15%. Use the drawdown chart below to compare losses from any high point for VBIIX and VSIGX.
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Drawdown Indicators
| VBIIX | VSIGX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -19.32% | -16.15% | -3.17% |
Max Drawdown (1Y)Largest decline over 1 year | -3.44% | -2.86% | -0.58% |
Max Drawdown (3Y)Largest decline over 3 years | -6.07% | -4.24% | -1.83% |
Max Drawdown (5Y)Largest decline over 5 years | -18.93% | -15.07% | -3.86% |
Max Drawdown (10Y)Largest decline over 10 years | -19.32% | -16.15% | -3.17% |
Current DrawdownCurrent decline from peak | -2.67% | -2.21% | -0.46% |
Average DrawdownAverage peak-to-trough decline | -2.98% | -3.51% | +0.53% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.14% | 0.95% | +0.19% |
Volatility
VBIIX vs. VSIGX - Volatility Comparison
Vanguard Intermediate-Term Bond Index Fund (VBIIX) has a higher volatility of 1.41% compared to Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) at 1.08%. This indicates that VBIIX'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
| VBIIX | VSIGX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.41% | 1.08% | +0.33% |
Volatility (6M)Calculated over the trailing 6-month period | 3.00% | 2.35% | +0.65% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.19% | 3.36% | +0.83% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.38% | 5.33% | +1.05% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.36% | 4.45% | +0.91% |
VBIIX vs. VSIGX - Expense Ratio Comparison
VBIIX has a 0.15% expense ratio, which is higher than VSIGX's 0.07% 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
VBIIX vs. VSIGX - Dividend Comparison
VBIIX's dividend yield for the trailing twelve months is around 4.13%, more than VSIGX's 3.84% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VBIIX Vanguard Intermediate-Term Bond Index Fund | 4.13% | 3.61% | 3.71% | 2.72% | 2.30% | 2.99% | 2.85% | 2.66% | 2.78% | 2.66% | 2.98% | 3.02% |
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | 3.84% | 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 0.95, VBIIX 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.
VBIIX has higher volatility (1.41%) compared to VSIGX (1.08%). In terms of maximum drawdown, VBIIX dropped -19.32% vs VSIGX's -16.15%.
VBIIX currently has the higher Sharpe Ratio (1.12 vs 1.05), 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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