IBTIvsSPTBETF Comparison
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iShares iBonds Dec 2028 Term Treasury ETF (IBTI) and State Street SPDR Portfolio Treasury ETF (SPTB) belong to the same industry segment: US Government Bonds. IBTI's top 2 sector exposures are Sovereign and Non-Corporate. In contrast, SPTB's top sector exposures are Sovereign. IBTI is more expensive with a Total Expense Ratio (TER) of 0.07%, versus 0.03% for SPTB. IBTI is up 0.86% year-to-date (YTD) with +$812M in YTD flows. SPTB performs worse with -1.43% YTD performance, and +$326M in YTD flows. Run a side-by-side ETF comparison of IBTI and SPTB 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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IBTI vs SPTB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/16/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IBTI SPTB | +0.43%+0.17% | +0.20%-1.38% | +0.86%-1.43% | +1.35%-1.79% | +14.87%n/a | +2.06%n/a |
| Flows | IBTI SPTB | +$138M-$11M | +$347M+$187M | +$812M+$326M | +$1.07B+$384M | +$2.01B- | +$2.19B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IBTI SPTB | +1.24%+3.84% | +1.43%+3.56% | +3.03%n/a | +4.95%n/a |
| Max drawdown | IBTI SPTB | -0.82%-2.86% | -1.08%-4.46% | -2.74%n/a | -14.59%n/a |
| Max drawdown duration | IBTI SPTB | 52d52d | 156d229d | 160dn/a | 1447dn/a |
Trading data
IBTI | SPTB | |
Last sale 10/16/2026 at 1:30 PM | $21.94 | $29.09 |
| Previous close 10/15/2026 | $21.92 | $29.07 |
| Consolidated volume 10/15/2026 | ||
| 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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IBTI | SPTB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/16/2026 at 1:30 PM
Live
Closed
IBTI | SPTB | |
|---|---|---|
| Last price | $21.94 | $29.09 |
| 1D performance | +0.07% | +0.09% |
| AuM | $2.19 B | $459.67 M |
| E/R | 0.07% | 0.03% |
Characteristics
IBTI | SPTB | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | iShares | State Street Investment Management |
| Benchmark | ICE 2028 Maturity US Treasury Index | Bloomberg US Treasury Index |
| N° of holdings | 47 | 281 |
| Asset class | Fixed Income | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | February 25, 2020 | May 20, 2024 |
| ESG | No | No |
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Exposure
Countries
IBTI
USA
97.29%
Other
2.71%
SPTB
USA
96.92%
Other
3.08%
Sectors
IBTI
Sovereign
96.99%
Other
3.01%
SPTB
Sovereign
96.92%
Other
3.08%
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Diversification
IBTI
Total weight of top 15 holdings out of 15
38.92%
SPTB
Total weight of top 15 holdings out of 15
11.18%
Top 15 holdings
Data as of August 31, 2026
IBTI
USA, Notes 3.5% 31jan2028, USD (U-2028)
4.47%
USA, Notes 3.375% 29feb2028, USD (AY-2028)
2.59%
USA, Notes 3.75% 30apr2028, USD (BA-2028)
2.56%
US91282CRH69
2.55%
USA, Notes 4.125% 30jun2028, USD (BD-2028)
2.52%
USA, Notes 3.875% 15jul2028, USD (AQ-2028)
2.47%
USA, Notes 2.875% 15may2028, USD (C-2028)
2.46%
USA, Notes 2.875% 15aug2028, USD (E-2028)
2.46%
USA, Notes 3.5% 15dec2028, USD (AV-2028)
2.44%
USA, Notes 3.875% 31mar2028, USD (AZ-2028)
2.43%
USA, Notes 3.125% 15nov2028, USD (F-2028)
2.42%
USA, Notes 4% 31may2028, USD (BC-2028)
2.41%
USA, Notes 1.125% 31aug2028, USD (P-2028)
2.40%
USA, Notes 1.25% 30apr2028, USD (K-2028)
2.37%
USA, Notes 3.5% 15oct2028, USD (AT-2028)
2.36%
SPTB
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.85%
USA, Notes 4% 15feb2034, USD (B-2034)
0.79%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.79%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.78%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.77%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.76%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.75%
USA, Notes 3.5% 15feb2033, USD (B-2033)
0.74%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.74%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.72%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.72%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.71%
USA, Notes 4% 15nov2035, USD (F-2035)
0.70%
USA, Notes 4% 28feb2030, USD (H-2030)
0.68%
USA, Notes 3.5% 31jan2028, USD (U-2028)
0.68%
Frequently asked questions about IBTI and SPTB
How have the IBTI and SPTB ETFs performed in 2026?
As of October 16, 2026, IBTI is up 0.86% year-to-date (YTD), while SPTB has lost -1.43%. That puts IBTI better performer ahead so far this year.
Which ETF is attracting more investor money: IBTI or SPTB?
Year-to-date, the IBTI ETF saw +$812M in flows, compared to +$326M for SPTB.
Which ETF is more volatile: IBTI or SPTB?
Over the past year, IBTI had a volatility of 1.43%, while SPTB experienced 3.56%.
Which ETF is bigger: IBTI or SPTB?
As of October 16, 2026, IBTI holds $2.19 B in assets under management (AUM), while SPTB manages $459.67 M.
What sectors do the IBTI and SPTB ETFs invest in?
IBTI leans toward sectors like Sovereign. Meanwhile, SPTB focuses on Sovereign.
What are the top holdings of the IBTI ETF and SPTB ETF?
IBTI top holdings include USA, Notes 3.5% 31jan2028, USD (U-2028), USA, Notes 3.375% 29feb2028, USD (AY-2028) and USA, Notes 3.75% 30apr2028, USD (BA-2028). SPTB holds in its top three: USA, Notes 4.625% 15feb2035, USD (B-2035), USA, Notes 4% 15feb2034, USD (B-2034) and USA, Notes 4.125% 15feb2036, USD (B-2036).
Which ETF is more diversified: IBTI or SPTB?
IBTI holds 47 securities with 38.92% of its assets in the top 15. SPTB has 287 securities and a top 15 weight of 11.18%.
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