VTAPX vs. RRPAX
VTAPX (Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares) and RRPAX (SEI Institutional Investments Trust Real Return Fund) are both Inflation-Protected Bonds funds. Over the past 10 years, VTAPX returned 3.09%/yr vs 2.92%/yr for RRPAX. Their correlation of 0.87 means they have usually moved in the same direction. VTAPX charges 0.06%/yr vs 0.02%/yr for RRPAX.
Performance
VTAPX vs. RRPAX - Performance Comparison
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Returns By Period
In the year-to-date period, VTAPX achieves a 1.81% return, which is significantly higher than RRPAX's 1.62% return. Over the past 10 years, VTAPX has outperformed RRPAX with an annualized return of 3.09%, while RRPAX has yielded a comparatively lower 2.92% annualized return.
VTAPX
- 1D
- 0.00%
- 1M
- 0.24%
- 6M
- 1.44%
- YTD
- 1.81%
- 1Y
- 3.07%
- 3Y*
- 5.10%
- 5Y*
- 3.05%
- 10Y*
- 3.09%
- ALL TIME*
- 2.21%
RRPAX
- 1D
- 0.00%
- 1M
- 0.29%
- 6M
- 1.18%
- YTD
- 1.62%
- 1Y
- 2.79%
- 3Y*
- 4.85%
- 5Y*
- 2.58%
- 10Y*
- 2.92%
- ALL TIME*
- 1.99%
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 |
VTAPX vs. RRPAX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
VTAPX Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares | 1.81% | 6.03% | 4.73% | 4.59% | -2.84% | 5.26% | 4.97% | 4.85% | 0.53% | 0.82% |
RRPAX SEI Institutional Investments Trust Real Return Fund | 1.62% | 6.53% | 4.54% | 3.49% | -4.06% | 5.41% | 5.64% | 5.01% | 0.31% | 0.73% |
Correlation
The correlation between VTAPX and RRPAX is 0.87, 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. | 0.87 |
Correlation (3Y) Balances recent behavior with more history. | 0.89 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.91 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.87 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2013 | 0.87 |
The correlation between VTAPX and RRPAX has been stable across timeframes, ranging from 0.87 to 0.91 - a consistent structural relationship.
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Return for Risk
VTAPX vs. RRPAX — Risk / Return Rank
VTAPX
RRPAX
VTAPX vs. RRPAX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares (VTAPX) and SEI Institutional Investments Trust Real Return Fund (RRPAX). 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.
| VTAPX | RRPAX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.50 | ||
| Sortino ratioReturn per unit of downside risk | +0.82 | ||
| Omega ratioGain probability vs. loss probability | 1.46 | 1.36 | +0.09 |
| Calmar ratioReturn relative to maximum drawdown | 4.59 | 3.42 | +1.18 |
| Martin ratioReturn relative to average drawdown | 14.34 | 10.31 | +4.03 |
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Drawdowns
VTAPX vs. RRPAX - Drawdown Comparison
The maximum VTAPX drawdown since its inception was -5.33%, smaller than the maximum RRPAX drawdown of -16.15%. Use the drawdown chart below to compare losses from any high point for VTAPX and RRPAX.
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Drawdown Indicators
| VTAPX | RRPAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -5.33% | -16.15% | +10.82% |
Max Drawdown (1Y)Largest decline over 1 year | -0.75% | -0.95% | +0.20% |
Max Drawdown (3Y)Largest decline over 3 years | -0.92% | -1.89% | +0.97% |
Max Drawdown (5Y)Largest decline over 5 years | -5.33% | -6.48% | +1.15% |
Max Drawdown (10Y)Largest decline over 10 years | -5.33% | -6.48% | +1.15% |
Current DrawdownCurrent decline from peak | -0.28% | -0.45% | +0.17% |
Average DrawdownAverage peak-to-trough decline | -1.02% | -2.93% | +1.91% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.24% | 0.31% | -0.07% |
Volatility
VTAPX vs. RRPAX - Volatility Comparison
The current volatility for Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares (VTAPX) is 0.40%, while SEI Institutional Investments Trust Real Return Fund (RRPAX) has a volatility of 0.49%. This indicates that VTAPX experiences smaller price fluctuations and is considered to be less risky than RRPAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| VTAPX | RRPAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.40% | 0.49% | -0.09% |
Volatility (6M)Calculated over the trailing 6-month period | 1.25% | 1.49% | -0.24% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.57% | 1.92% | -0.35% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 2.66% | 3.24% | -0.58% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 2.24% | 2.70% | -0.46% |
VTAPX vs. RRPAX - Expense Ratio Comparison
VTAPX has a 0.06% expense ratio, which is higher than RRPAX's 0.02% 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
VTAPX vs. RRPAX - Dividend Comparison
VTAPX's dividend yield for the trailing twelve months is around 4.12%, less than RRPAX's 5.45% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
RRPAX SEI Institutional Investments Trust Real Return Fund | 5.45% | 4.64% | 3.57% | 2.43% | 7.18% | 5.33% | 1.38% | 2.14% | 2.35% | 1.89% | 1.23% |
VTAPX Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares | 4.12% | 3.78% | 2.68% | 2.84% | 6.82% | 4.67% | 1.19% | 1.94% | 2.45% | 1.52% | 0.76% |
Frequently Asked Questions
VTAPX and RRPAX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RRPAX has higher volatility (0.49%) compared to VTAPX (0.40%). In terms of maximum drawdown, VTAPX dropped -5.33% vs RRPAX's -16.15%.
VTAPX currently has the higher Sharpe Ratio (2.20 vs 1.70), 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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