TDTT vs. MBSD
TDTT (FlexShares iBoxx 3-Year Target Duration TIPS Index Fund) and MBSD (FlexShares Disciplined Duration MBS Index Fund) are both exchange-traded funds - TDTT is a Inflation-Protected Bonds fund tracking the iBoxx 3-Year Target Duration TIPS, while MBSD is a Mortgage Backed Securities fund tracking the ICE BofA Constrained Duration US Mortgage Backed Securities. Both are passively managed. Over the past 10 years, TDTT returned 3.04%/yr vs 1.28%/yr for MBSD. Their 0.41 correlation means their historical movements had little consistent relationship. TDTT charges 0.18%/yr vs 0.20%/yr for MBSD.
Performance
TDTT vs. MBSD - Performance Comparison
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Returns By Period
In the year-to-date period, TDTT achieves a 1.36% return, which is significantly higher than MBSD's 0.05% return. Over the past 10 years, TDTT has outperformed MBSD with an annualized return of 3.04%, while MBSD has yielded a comparatively lower 1.28% annualized return.
TDTT
- 1D
- -0.07%
- 1M
- 0.10%
- 6M
- 1.06%
- YTD
- 1.36%
- 1Y
- 2.49%
- 3Y*
- 4.78%
- 5Y*
- 2.53%
- 10Y*
- 3.04%
- ALL TIME*
- 2.20%
MBSD
- 1D
- 0.24%
- 1M
- -0.64%
- 6M
- -0.19%
- YTD
- 0.05%
- 1Y
- 2.67%
- 3Y*
- 4.35%
- 5Y*
- 0.46%
- 10Y*
- 1.28%
- ALL TIME*
- 1.56%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $182.32K | $254.46K | $254.18K | |
| $4.63M | $4.98M | $5.09M |
TDTT vs. MBSD - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 1.36% | 6.67% | 3.96% | 4.40% | -4.58% | 5.49% | 6.84% | 5.74% | 0.25% | 0.43% |
MBSD FlexShares Disciplined Duration MBS Index Fund | 0.05% | 7.12% | 2.30% | 4.46% | -9.49% | -1.40% | 5.43% | 6.05% | 0.32% | 0.86% |
Correlation
The correlation between TDTT and MBSD is 0.51, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.51 |
Correlation (3Y) Balances recent behavior with more history. | 0.65 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.63 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.45 |
Correlation (All Time) Calculated using the full available price history since Sep 4, 2014 | 0.41 |
The correlation between TDTT and MBSD shifts across timeframes, from 0.41 (all time) to 0.65 (3 years), reflecting how their relationship changes across market environments.
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Return for Risk
TDTT vs. MBSD — Risk / Return Rank
TDTT
MBSD
TDTT vs. MBSD - 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 FlexShares Disciplined Duration MBS Index Fund (MBSD). 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 | MBSD | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.57 | ||
| Sortino ratioReturn per unit of downside risk | +0.88 | ||
| Omega ratioGain probability vs. loss probability | 1.26 | 1.14 | +0.12 |
| Calmar ratioReturn relative to maximum drawdown | 2.58 | 1.23 | +1.35 |
| Martin ratioReturn relative to average drawdown | 6.86 | 3.24 | +3.63 |
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Drawdowns
TDTT vs. MBSD - Drawdown Comparison
The maximum TDTT drawdown since its inception was -6.97%, smaller than the maximum MBSD drawdown of -14.36%. Use the drawdown chart below to compare losses from any high point for TDTT and MBSD.
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Drawdown Indicators
| TDTT | MBSD | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -6.97% | -14.36% | +7.39% |
Max Drawdown (1Y)Largest decline over 1 year | -0.97% | -2.17% | +1.20% |
Max Drawdown (3Y)Largest decline over 3 years | -1.53% | -4.25% | +2.72% |
Max Drawdown (5Y)Largest decline over 5 years | -6.97% | -14.01% | +7.04% |
Max Drawdown (10Y)Largest decline over 10 years | -6.97% | -14.36% | +7.39% |
Current DrawdownCurrent decline from peak | -0.58% | -1.56% | +0.98% |
Average DrawdownAverage peak-to-trough decline | -1.59% | -2.79% | +1.20% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.36% | 0.83% | -0.47% |
Volatility
TDTT vs. MBSD - Volatility Comparison
The current volatility for FlexShares iBoxx 3-Year Target Duration TIPS Index Fund (TDTT) is 0.55%, while FlexShares Disciplined Duration MBS Index Fund (MBSD) has a volatility of 0.89%. This indicates that TDTT experiences smaller price fluctuations and is considered to be less risky than MBSD based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| TDTT | MBSD | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.55% | 0.89% | -0.34% |
Volatility (6M)Calculated over the trailing 6-month period | 1.44% | 2.59% | -1.15% |
Volatility (1Y)Calculated over the trailing 1-year period | 1.83% | 3.35% | -1.52% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.66% | 5.17% | -1.51% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.38% | 4.27% | -0.89% |
TDTT vs. MBSD - Expense Ratio Comparison
TDTT has a 0.18% expense ratio, which is lower than MBSD's 0.20% 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
TDTT vs. MBSD - Dividend Comparison
TDTT's dividend yield for the trailing twelve months is around 5.61%, more than MBSD's 4.17% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
MBSD FlexShares Disciplined Duration MBS Index Fund | 4.17% | 4.23% | 3.91% | 3.39% | 3.03% | 2.41% | 2.78% | 3.42% | 3.22% | 3.30% | 3.02% | 3.46% |
TDTT FlexShares iBoxx 3-Year Target Duration TIPS Index Fund | 5.61% | 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 MBSD have a correlation of 0.51, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MBSD has higher volatility (0.89%) compared to TDTT (0.55%). In terms of maximum drawdown, TDTT dropped -6.97% vs MBSD's -14.36%.
On 10-year performance, TDTT leads with 3.04% vs 1.28% for MBSD. On fees, TDTT is cheaper at 0.18% per year. On volatility, TDTT has been the lower-risk option at 0.55%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 10-year period, TDTT has performed better with a 3.04% return vs 1.28%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
TDTT is cheaper with a 0.18% expense ratio, compared with 0.20% for MBSD.
TDTT has the higher dividend yield at 5.61%, compared with 4.17% for MBSD.
TDTT is categorized as Inflation-Protected Bonds, while MBSD is Mortgage Backed Securities. TDTT tracks iBoxx 3-Year Target Duration TIPS, while MBSD tracks ICE BofA Constrained Duration US Mortgage Backed Securities. Their fees differ too: 0.18% for TDTT and 0.20% for MBSD.
TDTT currently has the higher Sharpe Ratio (1.37 vs 0.80), 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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