TDTT vs. EIRRX
TDTT (FlexShares iBoxx 3-Year Target Duration TIPS Index Fund) and EIRRX (Eaton Vance Short Duration Inflation-Protected Income Fund) are both Inflation-Protected Bonds funds. Over the past 10 years, TDTT returned 3.00%/yr vs 3.75%/yr for EIRRX. A 0.71 correlation means they provide meaningful diversification when combined. TDTT charges 0.18%/yr vs 0.64%/yr for EIRRX.
Performance
TDTT vs. EIRRX - Performance Comparison
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Returns By Period
In the year-to-date period, TDTT achieves a 1.17% return, which is significantly higher than EIRRX's 0.85% return. Over the past 10 years, TDTT has underperformed EIRRX with an annualized return of 3.00%, while EIRRX has yielded a comparatively higher 3.75% annualized return.
TDTT
- 1D
- 0.15%
- 1M
- -0.35%
- YTD
- 1.17%
- 6M
- 1.30%
- 1Y
- 3.35%
- 3Y*
- 4.80%
- 5Y*
- 2.80%
- 10Y*
- 3.00%
EIRRX
- 1D
- 0.00%
- 1M
- -0.49%
- YTD
- 0.85%
- 6M
- 0.85%
- 1Y
- 2.83%
- 3Y*
- 4.92%
- 5Y*
- 3.52%
- 10Y*
- 3.75%
TDTT vs. EIRRX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 1.17% | 6.67% | 3.96% | 4.40% | -4.58% | 5.49% | 6.84% | 5.74% | 0.25% | 0.43% |
EIRRX Eaton Vance Short Duration Inflation-Protected Income Fund | 0.85% | 4.63% | 5.65% | 6.33% | -3.08% | 7.84% | 5.25% | 5.60% | -0.15% | 1.94% |
Correlation
The correlation between TDTT and EIRRX is 0.81, 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 | 0.81 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.80 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.83 |
Correlation (10Y) Calculated over the trailing 10-year period | 0.74 |
Correlation (All Time) Calculated using the full available price history since Aug 3, 2012 | 0.71 |
The correlation between TDTT and EIRRX shifts across timeframes, from 0.71 (all time) to 0.83 (5 years), reflecting how their relationship changes across market environments.
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Return for Risk
TDTT vs. EIRRX — Risk / Return Rank
TDTT
EIRRX
TDTT vs. EIRRX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) and Eaton Vance Short Duration Inflation-Protected Income Fund (EIRRX). 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.
| TDTT | EIRRX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.06 | ||
| Sortino ratioReturn per unit of downside risk | -0.02 | ||
| Omega ratioGain probability vs. loss probability | 1.34 | 1.40 | -0.05 |
| Calmar ratioReturn relative to maximum drawdown | 3.47 | 3.33 | +0.15 |
| Martin ratioReturn relative to average drawdown | 10.60 | 12.02 | -1.41 |
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Drawdowns
TDTT vs. EIRRX - Drawdown Comparison
The maximum TDTT drawdown since its inception was -6.97%, smaller than the maximum EIRRX drawdown of -10.27%. Use the drawdown chart below to compare losses from any high point for TDTT and EIRRX.
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Drawdown Indicators
| TDTT | EIRRX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -6.97% | -10.27% | +3.30% |
Max Drawdown (1Y)Largest decline over 1 year | -0.97% | -0.89% | -0.08% |
Max Drawdown (3Y)Largest decline over 3 years | -1.53% | -1.67% | +0.14% |
Max Drawdown (5Y)Largest decline over 5 years | -6.97% | -6.22% | -0.75% |
Max Drawdown (10Y)Largest decline over 10 years | -6.97% | -10.27% | +3.30% |
Current DrawdownCurrent decline from peak | -0.76% | -0.88% | +0.12% |
Average DrawdownAverage peak-to-trough decline | -1.59% | -0.99% | -0.60% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.32% | 0.24% | +0.08% |
Volatility
TDTT vs. EIRRX - Volatility Comparison
FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) has a higher volatility of 0.81% compared to Eaton Vance Short Duration Inflation-Protected Income Fund (EIRRX) at 0.70%. This indicates that TDTT's price experiences larger fluctuations and is considered to be riskier than EIRRX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TDTT | EIRRX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.81% | 0.70% | +0.11% |
Volatility (6M)Calculated over the trailing 6-month period | 1.41% | 1.31% | +0.10% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.94% | 1.63% | +0.31% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.66% | 2.84% | +0.82% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.38% | 2.77% | +0.61% |
TDTT vs. EIRRX - Expense Ratio Comparison
TDTT has a 0.18% expense ratio, which is lower than EIRRX's 0.64% expense ratio.
Dividends
TDTT vs. EIRRX - Dividend Comparison
TDTT's dividend yield for the trailing twelve months is around 4.57%, more than EIRRX's 4.10% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
EIRRX Eaton Vance Short Duration Inflation-Protected Income Fund | 4.10% | 3.57% | 4.08% | 4.50% | 5.07% | 3.54% | 2.21% | 2.66% | 2.91% | 2.13% | 2.24% | 2.05% |
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 4.57% | 4.52% | 4.01% | 3.88% | 6.97% | 4.53% | 1.15% | 1.91% | 2.48% | 1.88% | 1.01% | 0.00% |
Frequently Asked Questions
TDTT and EIRRX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TDTT has higher volatility (0.81%) compared to EIRRX (0.70%). In terms of maximum drawdown, TDTT dropped -6.97% vs EIRRX's -10.27%.
EIRRX currently has the higher Sharpe Ratio (1.80 vs 1.74), 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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