TDTTvsSPTLETF Comparison

ETF 1

TDTT

Northern Trust iBoxx 3-Year Target Duration TIPS ETF

This fund is part of

Inflation-linked Bonds

+0.22%

Full TDTT fund page

ETF 2

SPTL

State Street SPDR Portfolio Long Term Treasury ETF

This fund is part of

US Government Bonds

+0.07%

Full SPTL fund page

Northern Trust iBoxx 3-Year Target Duration TIPS ETF (TDTT) belongs to the Inflation-linked Bonds segment. State Street SPDR Portfolio Long Term Treasury ETF (SPTL) is part of the US Government Bonds segment. Both ETFs have the same top 1 sector exposures: Sovereign. TDTT is more expensive with a Total Expense Ratio (TER) of 0.19%, versus 0.03% for SPTL. TDTT is up 1.1% year-to-date (YTD) with +$87M in YTD flows. SPTL performs worse with -4.73% YTD performance, and +$1.34B in YTD flows. Run a side-by-side ETF comparison of TDTT and SPTL 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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TDTT vs SPTL performance and flow charts

Performance

Cumulative Flows

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Data Services

Historic performance and flows

Data as of 10/16/2026

		1M	3M	YTD	1Y	3Y	5Y
Perf.	TDTT SPTL	+0.43%-0.59%	-0.40%-3.57%	+1.10%-4.73%	+0.89%-7.19%	+15.15%+8.25%	+12.65%-30.14%
Flows	TDTT SPTL	+$39M+$667M	+$56M+$1.40B	+$87M+$1.34B	+$87M+$148M	+$596M+$5.31B	+$1.39B+$10.82B

Volatility and drawdown

		3M	1Y	3Y	5Y
Volatility	TDTT SPTL	+2.04%+9.61%	+1.92%+8.62%	+2.53%+11.80%	+3.49%+14.37%
Max drawdown	TDTT SPTL	-1.76%-7.06%	-1.85%-11.41%	-1.85%-13.74%	-6.94%-41.05%
Max drawdown duration	TDTT SPTL	52d89d	165d229d	165d760d	819d1776d

Trading data

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	TDTT	SPTL
Last sale 10/16/2026 at 1:30 PM	$23.44	$24.45
Previous close 10/16/2026	$23.39	$24.45
Consolidated volume 10/16/2026
Average volume 30 days
Average discount or premium 30 days
Average Bid/Ask spread 30 days

Replication quality

Data as of September 30, 2026

1-year trailing difference

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	TDTT	SPTL
Tracking error
Tracking difference
1 year cumulative return difference
Best
Worst
Daily return difference
Average
Worst

Main metrics

Last update 10/16/2026 at 1:30 PM

Live

Closed

	TDTT	SPTL
Last price	$23.44	$24.45
1D performance	+0.21%	+0.00%
AuM	$2.55 B	$11.47 B
E/R	0.19%	0.03%

Characteristics

	TDTT	SPTL
Management strategy	Passive	Passive
Provider	Northern Trust	State Street Investment Management
Benchmark	Markit iBoxx 3-Year Target Duration TIPS Index	Bloomberg US Long Treasury Index
N° of holdings	21	100
Asset class	Bonds	Bonds
Trailing 12m distribution yield	Join	Join
Inception date	September 19, 2011	May 23, 2007
ESG	No	No

More TDTT data on Trackinsight

More SPTL data on Trackinsight

Exposure

Countries

TDTT

USA

99.52%

Other

0.48%

SPTL

USA

98.1%

Other

1.9%

Sectors

TDTT

Sovereign

99.52%

Other

0.48%

SPTL

Sovereign

98.1%

Other

1.9%

Diversification

TDTT

Total weight of top 15 holdings out of 15

87.34%

SPTL

Total weight of top 15 holdings out of 15

29.18%

Top 15 holdings

Data as of August 31, 2026

TDTT

USA, TIPS 0.25% 15jul2029, USD (D-2029)

11.27%

USA, TIPS 1.625% 15oct2029, USD (AE-2029)

11.08%

USA, TIPS 0.875% 15jan2029, USD (A-2029)

10.58%

USA, TIPS 2.125% 15apr2029, USD (X-2029)

10.55%

USA, TIPS 3.875% 15apr2029, USD

9.31%

USA, TIPS 1.25% 15apr2031, USD (X-2031)

3.86%

USA, TIPS 1.125% 15oct2030, USD (AE-2030)

3.62%

USA, TIPS 1.625% 15apr2030, USD (X-2030)

3.58%

USA, TIPS 0.125% 15jul2031, USD (D-2031)

3.52%

USA, TIPS 0.5% 15jan2028, USD (A-2028)

3.45%

USA, TIPS 0.125% 15jul2030, USD (D-2030)

3.43%

USA, TIPS 0.125% 15jan2031, USD (A-2031)

3.41%

USA, TIPS 0.125% 15jan2030, USD (A-2030)

3.36%

USA, TIPS 0.75% 15jul2028, USD (D-2028)

3.20%

USA, TIPS 2.375% 15oct2028, USD (AE-2028)

3.10%

SPTL

USA, Bonds 5% 15may2056, USD

2.28%

USA, Bonds 4.75% 15feb2056, USD

2.19%

USA, Bonds 4.75% 15aug2055, USD

2.18%

USA, Bonds 4.75% 15may2055, USD

2.12%

USA, Bonds 4.625% 15may2054, USD

2.08%

USA, Bonds 4.625% 15nov2055, USD

2.08%

USA, Bonds 4.625% 15feb2055, USD

2.07%

USA, Bonds 4.5% 15nov2054, USD

2.04%

USA, Bonds 4.75% 15nov2053, USD

2.02%

USA, Bonds 4.25% 15aug2054, USD

1.95%

USA, Bonds 4.25% 15feb2054, USD

1.95%

USA, Bonds 4.125% 15aug2053, USD

1.74%

USA, Bonds 4% 15nov2052, USD

1.55%

USA, Bonds 1.75% 15aug2041, USD

1.50%

USA, Bonds 3.625% 15may2053, USD

1.44%

Frequently asked questions about TDTT and SPTL

How have the TDTT and SPTL ETFs performed in 2026?

As of October 16, 2026, TDTT is up 1.1% year-to-date (YTD), while SPTL has lost -4.73%. That puts TDTT better performer ahead so far this year.

Which ETF is attracting more investor money: TDTT or SPTL?

Year-to-date, the TDTT ETF saw +$87M in flows, compared to +$1.34B for SPTL.

Which ETF is more volatile: TDTT or SPTL?

Over the past year, TDTT had a volatility of 1.92%, while SPTL experienced 8.62%.

Which ETF is bigger: TDTT or SPTL?

As of October 16, 2026, TDTT holds $2.55 B in assets under management (AUM), while SPTL manages $11.47 B.

What sectors do the TDTT and SPTL ETFs invest in?

TDTT leans toward sectors like Sovereign. Meanwhile, SPTL focuses on Sovereign.

What are the top holdings of the TDTT ETF and SPTL ETF?

TDTT top holdings include USA, TIPS 0.25% 15jul2029, USD (D-2029), USA, TIPS 1.625% 15oct2029, USD (AE-2029) and USA, TIPS 0.875% 15jan2029, USD (A-2029). SPTL holds in its top three: USA, Bonds 5% 15may2056, USD, USA, Bonds 4.75% 15feb2056, USD and USA, Bonds 4.75% 15aug2055, USD.

TDTTvsSPTLETF Comparison

Northern Trust iBoxx 3-Year Target Duration TIPS ETF

State Street SPDR Portfolio Long Term Treasury ETF

TDTT vs SPTL performance and flow charts

Performance

Cumulative Flows

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Countries

Sectors

Diversification

Top 15 holdings

How have the TDTT and SPTL ETFs performed in 2026?

As of October 16, 2026, TDTT is up 1.1% year-to-date (YTD), while SPTL has lost -4.73%. That puts TDTT better performer ahead so far this year.

Which ETF is attracting more investor money: TDTT or SPTL?

Year-to-date, the TDTT ETF saw +$87M in flows, compared to +$1.34B for SPTL.

Which ETF is more volatile: TDTT or SPTL?

Over the past year, TDTT had a volatility of 1.92%, while SPTL experienced 8.62%.

Which ETF is bigger: TDTT or SPTL?

As of October 16, 2026, TDTT holds $2.55 B in assets under management (AUM), while SPTL manages $11.47 B.

What sectors do the TDTT and SPTL ETFs invest in?

TDTT leans toward sectors like Sovereign. Meanwhile, SPTL focuses on Sovereign.

What are the top holdings of the TDTT ETF and SPTL ETF?

TDTT top holdings include USA, TIPS 0.25% 15jul2029, USD (D-2029), USA, TIPS 1.625% 15oct2029, USD (AE-2029) and USA, TIPS 0.875% 15jan2029, USD (A-2029). SPTL holds in its top three: USA, Bonds 5% 15may2056, USD, USA, Bonds 4.75% 15feb2056, USD and USA, Bonds 4.75% 15aug2055, USD.

Which ETF is more diversified: TDTT or SPTL?

TDTT holds 21 securities with 87.34% of its assets in the top 15. SPTL has 101 securities and a top 15 weight of 29.18%.

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