VIITX vs. VAIPX
VIITX (Vanguard Institutional Intermediate-Term Bond Fund) and VAIPX (Vanguard Inflation-Protected Securities Fund Admiral Shares) are both mutual funds - VIITX is a Short-Term Bond fund managed by Vanguard, while VAIPX is a Inflation-Protected Bonds fund managed by Vanguard. Over the past 10 years, VIITX returned 2.13%/yr vs 2.64%/yr for VAIPX. A 0.78 correlation means they provide meaningful diversification when combined. VIITX charges 0.02%/yr vs 0.10%/yr for VAIPX.
Performance
VIITX vs. VAIPX - Performance Comparison
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Returns By Period
In the year-to-date period, VIITX achieves a 0.52% return, which is significantly lower than VAIPX's 1.65% return. Over the past 10 years, VIITX has underperformed VAIPX with an annualized return of 2.13%, while VAIPX has yielded a comparatively higher 2.64% annualized return.
VIITX
- 1D
- -0.13%
- 1M
- 0.06%
- YTD
- 0.52%
- 6M
- 0.80%
- 1Y
- 5.07%
- 3Y*
- 4.91%
- 5Y*
- 1.48%
- 10Y*
- 2.13%
VAIPX
- 1D
- 0.09%
- 1M
- 0.04%
- YTD
- 1.65%
- 6M
- 1.45%
- 1Y
- 5.18%
- 3Y*
- 4.04%
- 5Y*
- 1.10%
- 10Y*
- 2.64%
VIITX vs. VAIPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VIITX Vanguard Institutional Intermediate-Term Bond Fund | 0.52% | 7.23% | 3.67% | 5.31% | -7.99% | -1.02% | 6.17% | 6.44% | 0.87% | 2.00% |
VAIPX Vanguard Inflation-Protected Securities Fund Admiral Shares | 1.65% | 6.87% | 1.85% | 3.83% | -11.92% | 5.69% | 10.96% | 8.16% | -1.39% | 2.91% |
Correlation
The correlation between VIITX and VAIPX is 0.84, 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 | 0.84 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.88 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.80 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.78 |
Correlation (All Time) Calculated using the full available price history since Nov 4, 2015 | 0.78 |
The correlation between VIITX and VAIPX has been stable across timeframes, ranging from 0.78 to 0.88 - a consistent structural relationship.
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Return for Risk
VIITX vs. VAIPX — Risk / Return Rank
VIITX
VAIPX
VIITX vs. VAIPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Institutional Intermediate-Term Bond Fund (VIITX) and Vanguard Inflation-Protected Securities Fund Admiral Shares (VAIPX). 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.
| VIITX | VAIPX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.99 | 1.44 | +0.54 |
Sortino ratioReturn per unit of downside risk | 2.99 | 2.19 | +0.80 |
Omega ratioGain probability vs. loss probability | 1.37 | 1.26 | +0.12 |
Calmar ratioReturn relative to maximum drawdown | 2.71 | 2.54 | +0.17 |
Martin ratioReturn relative to average drawdown | 8.93 | 8.06 | +0.87 |
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
| VIITX | VAIPX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.99 | 1.44 | +0.54 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.39 | 0.18 | +0.20 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.70 | 0.50 | +0.20 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.76 | 0.52 | +0.24 |
Drawdowns
VIITX vs. VAIPX - Drawdown Comparison
The maximum VIITX drawdown since its inception was -11.86%, smaller than the maximum VAIPX drawdown of -15.04%. Use the drawdown chart below to compare losses from any high point for VIITX and VAIPX.
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Drawdown Indicators
| VIITX | VAIPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -11.86% | -15.04% | +3.18% |
Max Drawdown (1Y)Largest decline over 1 year | -1.89% | -2.05% | +0.16% |
Max Drawdown (3Y)Largest decline over 3 years | -3.32% | -4.52% | +1.20% |
Max Drawdown (5Y)Largest decline over 5 years | -11.86% | -14.40% | +2.54% |
Max Drawdown (10Y)Largest decline over 10 years | -11.86% | -14.40% | +2.54% |
Current DrawdownCurrent decline from peak | -0.91% | -0.09% | -0.82% |
Average DrawdownAverage peak-to-trough decline | -2.13% | -3.81% | +1.68% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.57% | 0.65% | -0.08% |
Volatility
VIITX vs. VAIPX - Volatility Comparison
The current volatility for Vanguard Institutional Intermediate-Term Bond Fund (VIITX) is 0.87%, while Vanguard Inflation-Protected Securities Fund Admiral Shares (VAIPX) has a volatility of 1.00%. This indicates that VIITX experiences smaller price fluctuations and is considered to be less risky than VAIPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VIITX | VAIPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.87% | 1.00% | -0.13% |
Volatility (6M)Calculated over the trailing 6-month period | 1.85% | 2.33% | -0.48% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.49% | 3.39% | -0.90% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.84% | 5.99% | -2.15% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.06% | 5.33% | -2.27% |
VIITX vs. VAIPX - Expense Ratio Comparison
VIITX has a 0.02% expense ratio, which is lower than VAIPX's 0.10% 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
VIITX vs. VAIPX - Dividend Comparison
VIITX's dividend yield for the trailing twelve months is around 4.57%, more than VAIPX's 4.49% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
VAIPX Vanguard Inflation-Protected Securities Fund Admiral Shares | 4.49% | 4.74% | 4.17% | 4.31% | 8.45% | 5.13% | 1.38% | 2.29% | 3.12% | 2.41% | 3.49% | 0.88% |
VIITX Vanguard Institutional Intermediate-Term Bond Fund | 4.57% | 4.51% | 4.71% | 3.61% | 2.14% | 2.20% | 2.87% | 2.69% | 2.62% | 2.04% | 2.95% | 0.57% |
Frequently Asked Questions
VIITX and VAIPX have a correlation of 0.84, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
VAIPX has higher volatility (1.00%) compared to VIITX (0.87%). In terms of maximum drawdown, VIITX dropped -11.86% vs VAIPX's -15.04%.
VIITX currently has the higher Sharpe Ratio (1.99 vs 1.44), 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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