DIPSX vs. VTAPX
DIPSX (DFA Inflation-Protected Securities Portfolio) and VTAPX (Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares) are both Inflation-Protected Bonds funds. Over the past 10 years, DIPSX returned 2.62%/yr vs 3.13%/yr for VTAPX. A 0.79 correlation means they provide meaningful diversification when combined. DIPSX charges 0.11%/yr vs 0.06%/yr for VTAPX.
Performance
DIPSX vs. VTAPX - Performance Comparison
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Returns By Period
In the year-to-date period, DIPSX achieves a 1.80% return, which is significantly lower than VTAPX's 2.05% return. Over the past 10 years, DIPSX has underperformed VTAPX with an annualized return of 2.62%, while VTAPX has yielded a comparatively higher 3.13% annualized return.
DIPSX
- 1D
- 0.00%
- 1M
- 0.18%
- YTD
- 1.80%
- 6M
- 1.36%
- 1Y
- 4.08%
- 3Y*
- 3.75%
- 5Y*
- 0.94%
- 10Y*
- 2.62%
VTAPX
- 1D
- 0.00%
- 1M
- 0.04%
- YTD
- 2.05%
- 6M
- 2.04%
- 1Y
- 4.69%
- 3Y*
- 5.23%
- 5Y*
- 3.38%
- 10Y*
- 3.13%
DIPSX vs. VTAPX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
DIPSX DFA Inflation-Protected Securities Portfolio | 1.80% | 5.77% | 2.02% | 3.93% | -12.26% | 5.55% | 11.65% | 8.54% | -1.30% | 3.28% |
VTAPX Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares | 2.05% | 6.03% | 4.73% | 4.59% | -2.84% | 5.26% | 4.97% | 4.85% | 0.53% | 0.82% |
Correlation
The correlation between DIPSX and VTAPX is 0.72, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.72 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.82 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.82 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.80 |
Correlation (All Time) Calculated using the full available price history since Jan 3, 2013 | 0.79 |
The correlation between DIPSX and VTAPX has been stable across timeframes, ranging from 0.72 to 0.82 - a consistent structural relationship.
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Return for Risk
DIPSX vs. VTAPX — Risk / Return Rank
DIPSX
VTAPX
DIPSX vs. VTAPX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for DFA Inflation-Protected Securities Portfolio (DIPSX) and Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares (VTAPX). 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.
| DIPSX | VTAPX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -1.88 | ||
| Sortino ratioReturn per unit of downside risk | -3.32 | ||
| Omega ratioGain probability vs. loss probability | 1.21 | 1.65 | -0.44 |
| Calmar ratioReturn relative to maximum drawdown | 1.98 | 6.45 | -4.46 |
| Martin ratioReturn relative to average drawdown | 5.53 | 25.59 | -20.06 |
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
| DIPSX | VTAPX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.16 | 3.03 | -1.88 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.15 | 1.27 | -1.12 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.46 | 1.41 | -0.95 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.33 | 1.07 | -0.74 |
Drawdowns
DIPSX vs. VTAPX - Drawdown Comparison
The maximum DIPSX drawdown since its inception was -14.64%, which is greater than VTAPX's maximum drawdown of -5.33%. Use the drawdown chart below to compare losses from any high point for DIPSX and VTAPX.
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Drawdown Indicators
| DIPSX | VTAPX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -14.64% | -5.33% | -9.31% |
Max Drawdown (1Y)Largest decline over 1 year | -2.03% | -0.72% | -1.31% |
Max Drawdown (3Y)Largest decline over 3 years | -4.75% | -0.92% | -3.83% |
Max Drawdown (5Y)Largest decline over 5 years | -14.64% | -5.33% | -9.31% |
Max Drawdown (10Y)Largest decline over 10 years | -14.64% | -5.33% | -9.31% |
Current DrawdownCurrent decline from peak | -0.51% | -0.04% | -0.47% |
Average DrawdownAverage peak-to-trough decline | -4.55% | -1.03% | -3.52% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.73% | 0.18% | +0.55% |
Volatility
DIPSX vs. VTAPX - Volatility Comparison
DFA Inflation-Protected Securities Portfolio (DIPSX) has a higher volatility of 0.87% compared to Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares (VTAPX) at 0.57%. This indicates that DIPSX's price experiences larger fluctuations and is considered to be riskier than VTAPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| DIPSX | VTAPX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.87% | 0.57% | +0.30% |
Volatility (6M)Calculated over the trailing 6-month period | 2.26% | 1.11% | +1.15% |
Volatility (1Y)Calculated over the trailing 1-year period | 3.50% | 1.52% | +1.98% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 6.36% | 2.67% | +3.69% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 5.71% | 2.23% | +3.48% |
DIPSX vs. VTAPX - Expense Ratio Comparison
DIPSX has a 0.11% expense ratio, which is higher than VTAPX's 0.06% 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
DIPSX vs. VTAPX - Dividend Comparison
DIPSX's dividend yield for the trailing twelve months is around 2.02%, less than VTAPX's 3.55% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
DIPSX DFA Inflation-Protected Securities Portfolio | 2.02% | 2.43% | 2.70% | 3.73% | 8.14% | 4.86% | 1.58% | 2.12% | 2.28% | 2.64% | 1.99% | 0.69% |
VTAPX Vanguard Short-Term Inflation-Protected Securities Index Fund Admiral Shares | 3.55% | 3.78% | 2.68% | 2.84% | 6.82% | 4.67% | 1.19% | 1.94% | 2.45% | 1.52% | 0.76% | 0.00% |
Frequently Asked Questions
DIPSX and VTAPX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
DIPSX has higher volatility (0.87%) compared to VTAPX (0.57%). In terms of maximum drawdown, DIPSX dropped -14.64% vs VTAPX's -5.33%.
VTAPX currently has the higher Sharpe Ratio (3.03 vs 1.16), 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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