TDTT vs. IBII
TDTT (FlexShares iBoxx 3-Year Target Duration TIPS Index Fund) and IBII (iShares iBonds Oct 2032 Term TIPS ETF) are both Inflation-Protected Bonds funds - TDTT tracks the iBoxx 3-Year Target Duration TIPS while IBII tracks the ICE 2032 Maturity US Inflation-Linked Treasury Index. Both are passively managed. Over the past year, TDTT returned 4.44% vs 5.28% for IBII. Their correlation of 0.85 suggests significant overlap in exposure. TDTT charges 0.18%/yr vs 0.10%/yr for IBII.
Performance
TDTT vs. IBII - Performance Comparison
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Returns By Period
In the year-to-date period, TDTT achieves a 1.76% return, which is significantly higher than IBII's 1.63% return.
TDTT
- 1D
- -0.04%
- 1M
- -0.02%
- YTD
- 1.76%
- 6M
- 1.79%
- 1Y
- 4.44%
- 3Y*
- 4.93%
- 5Y*
- 2.84%
- 10Y*
- 3.10%
IBII
- 1D
- 0.02%
- 1M
- -0.38%
- YTD
- 1.63%
- 6M
- 1.21%
- 1Y
- 5.28%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
TDTT vs. IBII - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | |
|---|---|---|---|---|
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 1.76% | 6.67% | 3.96% | 2.94% |
IBII iShares iBonds Oct 2032 Term TIPS ETF | 1.63% | 8.65% | 1.21% | 4.85% |
Correlation
The correlation between TDTT and IBII is 0.83, 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 | 0.83 |
Correlation (All Time) Calculated using the full available price history since Sep 22, 2023 | 0.85 |
The correlation between TDTT and IBII has been stable across timeframes, ranging from 0.83 to 0.85 - a consistent structural relationship.
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Return for Risk
TDTT vs. IBII — Risk / Return Rank
TDTT
IBII
TDTT vs. IBII - 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 iShares iBonds Oct 2032 Term TIPS ETF (IBII). 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.
| TDTT | IBII | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.87 | ||
| Sortino ratioReturn per unit of downside risk | +1.63 | ||
| Omega ratioGain probability vs. loss probability | 1.49 | 1.28 | +0.21 |
| Calmar ratioReturn relative to maximum drawdown | 4.93 | 2.68 | +2.25 |
| Martin ratioReturn relative to average drawdown | 16.04 | 9.32 | +6.72 |
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
| TDTT | IBII | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.43 | 1.56 | +0.87 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.78 | — | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.92 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.69 | 1.12 | -0.43 |
Drawdowns
TDTT vs. IBII - Drawdown Comparison
The maximum TDTT drawdown since its inception was -6.97%, which is greater than IBII's maximum drawdown of -4.65%. Use the drawdown chart below to compare losses from any high point for TDTT and IBII.
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Drawdown Indicators
| TDTT | IBII | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -6.97% | -4.65% | -2.32% |
Max Drawdown (1Y)Largest decline over 1 year | -0.90% | -1.98% | +1.08% |
Max Drawdown (3Y)Largest decline over 3 years | -1.53% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -6.97% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -6.97% | — | — |
Current DrawdownCurrent decline from peak | -0.18% | -0.65% | +0.47% |
Average DrawdownAverage peak-to-trough decline | -1.60% | -1.12% | -0.48% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.28% | 0.58% | -0.30% |
Volatility
TDTT vs. IBII - Volatility Comparison
The current volatility for FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) is 0.45%, while iShares iBonds Oct 2032 Term TIPS ETF (IBII) has a volatility of 0.89%. This indicates that TDTT experiences smaller price fluctuations and is considered to be less risky than IBII based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TDTT | IBII | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.45% | 0.89% | -0.44% |
Volatility (6M)Calculated over the trailing 6-month period | 1.21% | 2.29% | -1.08% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.84% | 3.42% | -1.58% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.67% | 5.42% | -1.75% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.38% | 5.42% | -2.04% |
TDTT vs. IBII - Expense Ratio Comparison
TDTT has a 0.18% expense ratio, which is higher than IBII's 0.10% 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
TDTT vs. IBII - Dividend Comparison
TDTT's dividend yield for the trailing twelve months is around 4.55%, more than IBII's 4.05% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
IBII iShares iBonds Oct 2032 Term TIPS ETF | 4.05% | 4.80% | 4.76% | 1.10% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 4.55% | 4.52% | 4.01% | 3.88% | 6.97% | 4.53% | 1.15% | 1.91% | 2.48% | 1.88% | 1.01% |
Frequently Asked Questions
TDTT and IBII have a correlation of 0.83, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
IBII has higher volatility (0.89%) compared to TDTT (0.45%). In terms of maximum drawdown, TDTT dropped -6.97% vs IBII's -4.65%.
On 1-year performance, IBII leads with 5.28% vs 4.44% for TDTT. On fees, IBII is cheaper at 0.10% per year. On volatility, TDTT has been the lower-risk option at 0.45%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, IBII has performed better with a 5.28% return vs 4.44%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IBII is cheaper with a 0.10% expense ratio, compared with 0.18% for TDTT.
TDTT has the higher dividend yield at 4.55%, compared with 4.05% for IBII.
TDTT tracks iBoxx 3-Year Target Duration TIPS, while IBII tracks ICE 2032 Maturity US Inflation-Linked Treasury Index. They also come from different issuers: Northern Trust and iShares. Their fees differ too: 0.18% for TDTT and 0.10% for IBII.
TDTT currently has the higher Sharpe Ratio (2.43 vs 1.56), 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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