VSIGX vs. VIIGX
VSIGX (Vanguard Intermediate-Term Treasury Index Fund Admiral Shares) and VIIGX (Vanguard Intermediate-Term Treasury Index Fund Institutional Shares) are both Government Bonds funds from Vanguard. Over the past 10 years, VSIGX returned 1.25%/yr vs 1.30%/yr for VIIGX. With a 0.99 correlation, they move nearly in lockstep. VSIGX charges 0.07%/yr vs 0.05%/yr for VIIGX.
Performance
VSIGX vs. VIIGX - Performance Comparison
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Returns By Period
In the year-to-date period, VSIGX achieves a -0.33% return, which is significantly lower than VIIGX's -0.27% return. Both investments have delivered pretty close results over the past 10 years, with VSIGX having a 1.25% annualized return and VIIGX not far ahead at 1.30%.
VSIGX
- 1D
- -0.08%
- 1M
- -0.23%
- YTD
- -0.33%
- 6M
- -0.30%
- 1Y
- 3.63%
- 3Y*
- 3.55%
- 5Y*
- 0.14%
- 10Y*
- 1.25%
VIIGX
- 1D
- -0.08%
- 1M
- -0.24%
- YTD
- -0.27%
- 6M
- -0.26%
- 1Y
- 3.66%
- 3Y*
- 3.58%
- 5Y*
- 0.16%
- 10Y*
- 1.30%
VSIGX vs. VIIGX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | -0.33% | 7.36% | 1.65% | 4.39% | -10.69% | -2.60% | 7.65% | 6.26% | 1.35% | 1.58% |
VIIGX Vanguard Intermediate-Term Treasury Index Fund Institutional Shares | -0.27% | 7.38% | 1.62% | 4.39% | -10.65% | -2.38% | 7.65% | 6.32% | 1.36% | 1.60% |
Correlation
The correlation between VSIGX and VIIGX is 0.99 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.99 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.99 |
Correlation (5Y) Calculated over the trailing 5-year period | 1.00 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.99 |
Correlation (All Time) Calculated using the full available price history since Nov 24, 2009 | 0.99 |
The correlation between VSIGX and VIIGX has been stable across timeframes, ranging from 0.99 to 1.00 - a consistent structural relationship.
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Return for Risk
VSIGX vs. VIIGX — Risk / Return Rank
VSIGX
VIIGX
VSIGX vs. VIIGX - 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 Intermediate-Term Treasury Index Fund Institutional Shares (VIIGX). 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.
| VSIGX | VIIGX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.01 | 1.01 | -0.01 |
Sortino ratioReturn per unit of downside risk | 1.52 | 1.53 | -0.01 |
Omega ratioGain probability vs. loss probability | 1.18 | 1.18 | 0.00 |
Calmar ratioReturn relative to maximum drawdown | 1.28 | 1.31 | -0.03 |
Martin ratioReturn relative to average drawdown | 3.93 | 4.01 | -0.08 |
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
| VSIGX | VIIGX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.01 | 1.01 | -0.01 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.03 | 0.03 | 0.00 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.28 | 0.29 | -0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.51 | 0.50 | +0.01 |
Drawdowns
VSIGX vs. VIIGX - Drawdown Comparison
The maximum VSIGX drawdown since its inception was -16.15%, roughly equal to the maximum VIIGX drawdown of -15.96%. Use the drawdown chart below to compare losses from any high point for VSIGX and VIIGX.
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Drawdown Indicators
| VSIGX | VIIGX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -16.15% | -15.96% | -0.19% |
Max Drawdown (1Y)Largest decline over 1 year | -2.86% | -2.83% | -0.03% |
Max Drawdown (3Y)Largest decline over 3 years | -4.24% | -4.30% | +0.06% |
Max Drawdown (5Y)Largest decline over 5 years | -15.07% | -15.09% | +0.02% |
Max Drawdown (10Y)Largest decline over 10 years | -16.15% | -15.96% | -0.19% |
Current DrawdownCurrent decline from peak | -2.06% | -1.87% | -0.19% |
Average DrawdownAverage peak-to-trough decline | -3.51% | -3.42% | -0.09% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.93% | 0.92% | +0.01% |
Volatility
VSIGX vs. VIIGX - Volatility Comparison
Vanguard Intermediate-Term Treasury Index Fund Admiral Shares (VSIGX) and Vanguard Intermediate-Term Treasury Index Fund Institutional Shares (VIIGX) have volatilities of 1.10% and 1.10%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VSIGX | VIIGX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.10% | 1.10% | 0.00% |
Volatility (6M)Calculated over the trailing 6-month period | 2.38% | 2.40% | -0.02% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.38% | 3.43% | -0.05% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.33% | 5.34% | -0.01% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.45% | 4.45% | 0.00% |
VSIGX vs. VIIGX - Expense Ratio Comparison
VSIGX has a 0.07% expense ratio, which is higher than VIIGX's 0.05% 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
VSIGX vs. VIIGX - Dividend Comparison
VSIGX's dividend yield for the trailing twelve months is around 3.83%, which matches VIIGX's 3.85% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VIIGX Vanguard Intermediate-Term Treasury Index Fund Institutional Shares | 3.85% | 3.78% | 3.97% | 2.71% | 1.73% | 1.91% | 2.23% | 2.23% | 2.07% | 1.68% | 1.64% | 1.72% |
VSIGX Vanguard Intermediate-Term Treasury Index Fund Admiral Shares | 3.83% | 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 0.99, VSIGX and VIIGX 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.
VIIGX has higher volatility (1.10%) compared to VSIGX (1.10%). In terms of maximum drawdown, VSIGX dropped -16.15% vs VIIGX's -15.96%.
VIIGX currently has the higher Sharpe Ratio (1.01 vs 1.01), 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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