TDTFvsSPTIETF Comparison
ETF 1
TDTF
Northern Trust iBoxx 5-Year Target Duration TIPS ETF
This fund is part of
Inflation-linked Bonds
-0.34%
VS
ETF 2
SPTI
State Street SPDR Portfolio Intermediate Term Treasury ETF
This fund is part of
US Government Bonds
-0.09%
Northern Trust iBoxx 5-Year Target Duration TIPS ETF (TDTF) belongs to the Inflation-linked Bonds segment. State Street SPDR Portfolio Intermediate Term Treasury ETF (SPTI) is part of the US Government Bonds segment. Both ETFs have the same top 1 sector exposures: Sovereign. TDTF is more expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.03% for SPTI. TDTF is up 0.23% year-to-date (YTD) with +$135M in YTD flows. SPTI performs worse with -1.79% YTD performance, and +$1.32B in YTD flows. Run a side-by-side ETF comparison of TDTF and SPTI below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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TDTF vs SPTI performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/10/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | TDTF SPTI | -0.70%-1.32% | -0.82%-1.65% | +0.23%-1.79% | -0.19%-1.24% | +13.96%+11.19% | +4.29%-1.92% |
| Flows | TDTF SPTI | +$9M+$51M | +$40M+$506M | +$135M+$1.32B | +$208M+$1.88B | +$334M+$6.51B | +$521M+$8.18B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | TDTF SPTI | +3.27%+3.44% | +2.88%+3.30% | +4.14%+4.40% | +5.50%+5.36% |
| Max drawdown | TDTF SPTI | -1.30%-2.12% | -1.85%-3.40% | -3.32%-4.32% | -11.98%-14.69% |
| Max drawdown duration | TDTF SPTI | 16d75d | 129d194d | 156d198d | 1204d1532d |
Trading data
TDTF | SPTI | |
Last sale 9/11/2026 at 1:30 PM | $23.02 | $27.61 |
| Previous close 09/10/2026 | $23.13 | $27.65 |
| Consolidated volume 09/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of August 31, 2026
1-year trailing difference
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TDTF | SPTI | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
TDTF | SPTI | |
|---|---|---|
| Last price | $23.02 | $27.61 |
| 1D performance | -0.48% | -0.14% |
| AuM | $1.04 B | $10.49 B |
| E/R | 0.19% | 0.03% |
Characteristics
TDTF | SPTI | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Northern Trust | State Street Investment Management |
| Benchmark | Markit iBoxx 5-Year Target Duration TIPS Index | Bloomberg 3-10 Year U.S. Treasury Index |
| N° of holdings | 16 | 103 |
| Asset class | Bonds | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | September 19, 2011 | May 23, 2007 |
| ESG | No | No |
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Exposure
Countries
TDTF
USA
100.61%
Other
-0.61%
SPTI
USA
98.7%
Other
1.3%
Sectors
TDTF
Sovereign
100.61%
Other
-0.61%
SPTI
Sovereign
98.7%
Other
1.3%
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Diversification
TDTF
Total weight of top 15 holdings out of 15
98.36%
SPTI
Total weight of top 15 holdings out of 15
26.58%
Top 15 holdings
Data as of July 31, 2026
TDTF
USA, TIPS 1.25% 15apr2031, USD (X-2031)
12.57%
USA, TIPS 0.125% 15jan2032, USD (A-2032)
12.17%
USA, TIPS 0.125% 15jul2031, USD (D-2031)
11.71%
USA, TIPS 0.125% 15jan2031, USD (A-2031)
11.35%
USA, TIPS 2.125% 15jan2035, USD (A-2035)
5.39%
USA, TIPS 1.875% 15jul2034, USD (D-2034)
4.95%
USA, TIPS 1.75% 15jan2034, USD (A-2034)
4.69%
USA, TIPS 1.125% 15oct2030, USD (AE-2030)
4.68%
USA, TIPS 1.625% 15apr2030, USD (X-2030)
4.63%
USA, TIPS 1.125% 15jan2033, USD (A-2033)
4.55%
USA, TIPS 0.125% 15jul2030, USD (D-2030)
4.44%
USA, TIPS 0.625% 15jul2032, USD (D-2032)
4.39%
USA, TIPS 0.125% 15jan2030, USD (A-2030)
4.34%
USA, TIPS 1.375% 15jul2033, USD (D-2033)
4.27%
USA, TIPS 1.625% 15oct2029, USD (AE-2029)
4.24%
SPTI
USA, Notes 4.625% 15feb2035, USD (B-2035)
1.95%
USA, Notes 4.25% 15aug2035, USD (E-2035)
1.92%
USA, Notes 4.25% 15nov2034, USD (F-2034)
1.91%
USA, Notes 4.25% 15may2035, USD (C-2035)
1.89%
USA, Notes 4.375% 15may2034, USD (C-2034)
1.86%
USA, Notes 4% 15feb2034, USD (B-2034)
1.84%
USA, Notes 4.5% 15nov2033, USD (F-2033)
1.82%
USA, Notes 3.875% 15aug2034, USD (E-2034)
1.78%
USA, Notes 4% 15nov2035, USD (F-2035)
1.76%
USA, Notes 4% 28feb2030, USD (H-2030)
1.74%
USA, Notes 4.125% 15feb2036, USD (B-2036)
1.69%
USA, Notes 2.75% 15aug2032, USD (E-2032)
1.65%
USA, Notes 3.875% 15aug2033, USD (E-2033)
1.61%
USA, Notes 4.125% 15nov2032, USD (F-2032)
1.61%
USA, Notes 4.375% 15may2036, USD (C-2036)
1.54%
Frequently asked questions about TDTF and SPTI
How have the TDTF and SPTI ETFs performed in 2026?
As of September 10, 2026, TDTF is up 0.23% year-to-date (YTD), while SPTI has lost -1.79%. That puts TDTF better performer ahead so far this year.
Which ETF is attracting more investor money: TDTF or SPTI?
Year-to-date, the TDTF ETF saw +$135M in flows, compared to +$1.32B for SPTI.
Which ETF is more volatile: TDTF or SPTI?
Over the past year, TDTF had a volatility of 2.88%, while SPTI experienced 3.3%.
Which ETF is bigger: TDTF or SPTI?
As of September 10, 2026, TDTF holds $1.04 B in assets under management (AUM), while SPTI manages $10.49 B.
What sectors do the TDTF and SPTI ETFs invest in?
TDTF leans toward sectors like Sovereign. Meanwhile, SPTI focuses on Sovereign.
What are the top holdings of the TDTF ETF and SPTI ETF?
TDTF top holdings include USA, TIPS 1.25% 15apr2031, USD (X-2031), USA, TIPS 0.125% 15jan2032, USD (A-2032) and USA, TIPS 0.125% 15jul2031, USD (D-2031). SPTI holds in its top three: USA, Notes 4.625% 15feb2035, USD (B-2035), USA, Notes 4.25% 15aug2035, USD (E-2035) and USA, Notes 4.25% 15nov2034, USD (F-2034).
Which ETF is more diversified: TDTF or SPTI?
TDTF holds 16 securities with 98.36% of its assets in the top 15. SPTI has 103 securities and a top 15 weight of 26.58%.
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Latest news about TDTF & SPTI
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