IBIC vs. TDTT
IBIC (iShares iBonds Oct 2026 Term TIPS ETF) and TDTT (FlexShares iBoxx 3-Year Target Duration TIPS Index Fund) are both Inflation-Protected Bonds funds - IBIC tracks the ICE 2026 Maturity US Inflation-Linked Treasury Index while TDTT tracks the iBoxx 3-Year Target Duration TIPS. Both are passively managed. Over the past year, IBIC returned 4.54% vs 4.65% for TDTT. A 0.68 correlation means they provide meaningful diversification when combined. IBIC charges 0.10%/yr vs 0.18%/yr for TDTT.
Performance
IBIC vs. TDTT - Performance Comparison
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Returns By Period
In the year-to-date period, IBIC achieves a 2.37% return, which is significantly higher than TDTT's 1.81% return.
IBIC
- 1D
- 0.02%
- 1M
- 0.27%
- YTD
- 2.37%
- 6M
- 2.51%
- 1Y
- 4.54%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
TDTT
- 1D
- 0.00%
- 1M
- -0.06%
- YTD
- 1.81%
- 6M
- 1.77%
- 1Y
- 4.65%
- 3Y*
- 5.00%
- 5Y*
- 2.85%
- 10Y*
- 3.11%
IBIC vs. TDTT - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | |
|---|---|---|---|---|
IBIC iShares iBonds Oct 2026 Term TIPS ETF | 2.37% | 4.96% | 5.25% | 2.17% |
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 1.81% | 6.67% | 3.96% | 2.50% |
Correlation
The correlation between IBIC and TDTT is 0.35, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.35 |
Correlation (All Time) Calculated using the full available price history since Sep 18, 2023 | 0.68 |
Over the past year, the correlation between IBIC and TDTT has dropped to 0.35 - well below their long-term average of 0.68, suggesting their price drivers have been diverging.
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Return for Risk
IBIC vs. TDTT — Risk / Return Rank
IBIC
TDTT
IBIC vs. TDTT - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for iShares iBonds Oct 2026 Term TIPS ETF (IBIC) and FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT). 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.
| IBIC | TDTT | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +2.51 | ||
| Sortino ratioReturn per unit of downside risk | +4.92 | ||
| Omega ratioGain probability vs. loss probability | 2.24 | 1.51 | +0.73 |
| Calmar ratioReturn relative to maximum drawdown | 17.27 | 5.17 | +12.10 |
| Martin ratioReturn relative to average drawdown | 67.45 | 16.59 | +50.86 |
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
| IBIC | TDTT | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 5.05 | 2.54 | +2.51 |
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 | 3.49 | 0.69 | +2.80 |
Drawdowns
IBIC vs. TDTT - Drawdown Comparison
The maximum IBIC drawdown since its inception was -0.90%, smaller than the maximum TDTT drawdown of -6.97%. Use the drawdown chart below to compare losses from any high point for IBIC and TDTT.
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Drawdown Indicators
| IBIC | TDTT | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -0.90% | -6.97% | +6.07% |
Max Drawdown (1Y)Largest decline over 1 year | -0.26% | -0.90% | +0.64% |
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 | -0.13% | -0.14% | +0.01% |
Average DrawdownAverage peak-to-trough decline | -0.10% | -1.60% | +1.50% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.07% | 0.28% | -0.21% |
Volatility
IBIC vs. TDTT - Volatility Comparison
The current volatility for iShares iBonds Oct 2026 Term TIPS ETF (IBIC) is 0.33%, while FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) has a volatility of 0.46%. This indicates that IBIC experiences smaller price fluctuations and is considered to be less risky than TDTT based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| IBIC | TDTT | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.33% | 0.46% | -0.13% |
Volatility (6M)Calculated over the trailing 6-month period | 0.67% | 1.21% | -0.54% |
Volatility (1Y)Calculated over the trailing 1-year period | 0.90% | 1.85% | -0.95% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 1.58% | 3.67% | -2.09% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 1.58% | 3.38% | -1.80% |
IBIC vs. TDTT - Expense Ratio Comparison
IBIC has a 0.10% expense ratio, which is lower than TDTT's 0.18% 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
IBIC vs. TDTT - Dividend Comparison
IBIC's dividend yield for the trailing twelve months is around 3.59%, less than TDTT's 4.54% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 |
|---|---|---|---|---|---|---|---|---|---|---|---|
IBIC iShares iBonds Oct 2026 Term TIPS ETF | 3.59% | 4.43% | 4.65% | 0.83% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 4.54% | 4.52% | 4.01% | 3.88% | 6.97% | 4.53% | 1.15% | 1.91% | 2.48% | 1.88% | 1.01% |
Frequently Asked Questions
IBIC and TDTT have a correlation of 0.35, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
TDTT has higher volatility (0.46%) compared to IBIC (0.33%). In terms of maximum drawdown, IBIC dropped -0.90% vs TDTT's -6.97%.
On 1-year performance, TDTT leads with 4.65% vs 4.54% for IBIC. On fees, IBIC is cheaper at 0.10% per year. On volatility, IBIC has been the lower-risk option at 0.33%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, TDTT has performed better with a 4.65% return vs 4.54%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IBIC is cheaper with a 0.10% expense ratio, compared with 0.18% for TDTT.
TDTT has the higher dividend yield at 4.54%, compared with 3.59% for IBIC.
IBIC tracks ICE 2026 Maturity US Inflation-Linked Treasury Index, while TDTT tracks iBoxx 3-Year Target Duration TIPS. They also come from different issuers: iShares and Northern Trust. Their fees differ too: 0.10% for IBIC and 0.18% for TDTT.
IBIC currently has the higher Sharpe Ratio (5.05 vs 2.54), 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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