SDSIvsIMTBETF Comparison
ETF 1
SDSI
American Century Short Duration Strategic Income ETF
This fund is part of
Intl Aggregate Bonds
-0.07%
VS
American Century Short Duration Strategic Income ETF (SDSI) belongs to the Intl Aggregate Bonds segment. iShares Core 5-10 Year USD Bond ETF (IMTB) is part of the US Aggregate Bonds segment. SDSI's top 3 sector exposures are Finance, Sovereign and Energy. In contrast, IMTB's top sector exposures are Sovereign, Industrials and Non-Corporate. SDSI is more expensive with a Total Expense Ratio (TER) of 0.32%, versus 0.07% for IMTB. SDSI is up 1.56% year-to-date (YTD) with +$143M in YTD flows. IMTB performs worse with -1.48% YTD performance, and +$4M in YTD flows. Run a side-by-side ETF comparison of SDSI and IMTB 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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SDSI vs IMTB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SDSI IMTB | -0.28%-1.45% | +0.26%-2.12% | +1.56%-1.48% | +2.99%-0.50% | +18.07%+14.94% | n/a-0.14% |
| Flows | SDSI IMTB | +$26M- | +$79M- | +$143M+$4M | +$231M+$26M | +$264M+$84M | -+$158M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SDSI IMTB | +1.28%+4.29% | +1.23%+3.94% | +1.67%+5.39% | n/a+6.20% |
| Max drawdown | SDSI IMTB | -0.56%-2.68% | -1.10%-3.36% | -1.10%-5.03% | n/a-18.13% |
| Max drawdown duration | SDSI IMTB | 17d74d | 52d194d | 52d280d | n/a1452d |
Trading data
SDSI | IMTB | |
Last sale 9/11/2026 at 1:30 PM | $50.74 | $42.16 |
| Previous close 09/10/2026 | $50.81 | $42.20 |
| 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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SDSI
is actively managed and doesn’t replicate an indexSDSI | IMTB | |
|---|---|---|
| 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
SDSI | IMTB | |
|---|---|---|
| Last price | $50.74 | $42.16 |
| 1D performance | -0.14% | -0.09% |
| AuM | $296.85 M | $269.82 M |
| E/R | 0.32% | 0.07% |
Characteristics
SDSI | IMTB | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | American Century Investments | iShares |
| Benchmark | - | Bloomberg U.S. Universal 5-10 Years Index |
| N° of holdings | 225 | 2875 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | October 11, 2022 | November 1, 2016 |
| ESG | No | No |
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Exposure
Countries
SDSI
USA
60.95%
Other
39.05%
IMTB
USA
63.31%
Other
36.69%
Sectors
SDSI
Finance
29.58%
Sovereign
18.17%
Other
52.26%
IMTB
Sovereign
24.95%
Industrials
13.03%
Non-Corporate
10.19%
Finance
10.09%
Other
41.75%
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Diversification
SDSI
Total weight of top 15 holdings out of 15
26.83%
IMTB
Total weight of top 15 holdings out of 15
23.24%
Top 15 holdings
Data as of July 31, 2026
SDSI
USA, Notes 4% 31oct2029, USD (R-2029)
11.06%
USA, Notes 4.25% 31jul2028, USD (BE-2028)
6.33%
State Street Institutional US Government Money Market Fund
3.15%
Expand Energy, 5.375% 15mar2030, USD
0.56%
Global Atlantic Fin, 4.4% 15oct2029, USD
0.55%
CMS Energy, 4.75% 1jun2050, USD
0.55%
Standard Industries, 4.75% 15jan2028, USD
0.54%
CCO Holdings, 5% 1feb2028, USD
0.54%
American Airlines, 7.25% 15feb2028, USD
0.53%
Herc Holdings, 7% 15jun2030, USD
0.52%
United Airlines, 4.625% 15apr2029, USD
0.51%
Crown Castle, 4.9% 1sep2029, USD
0.50%
Medline Borrower, 6.25% 1apr2029, USD
0.50%
Swedbank, 7.75% perp., USD
0.50%
Build NYC Resource Corp., 7% 15dec2030, USD (2026C)
0.50%
IMTB
BlackRock Cash Funds - Institutional
10.15%
USA, Notes 4.375% 15may2034, USD (C-2034)
1.19%
USA, Notes 4.25% 15aug2035, USD (E-2035)
1.16%
USA, Notes 4% 15nov2035, USD (F-2035)
1.11%
USA, Notes 4.625% 15feb2035, USD (B-2035)
1.03%
US01F0206874
0.93%
USA, Notes 2.875% 15may2032, USD (C-2032)
0.92%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.91%
USA, Notes 4% 15feb2034, USD (B-2034)
0.86%
USA, Notes 1.25% 15aug2031, USD (E-2031)
0.85%
US31418EDB39
0.85%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.82%
US3140XLFE34
0.82%
USA, Notes 4.5% 15nov2033, USD (F-2033)
0.82%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.82%
Frequently asked questions about SDSI and IMTB
How have the SDSI and IMTB ETFs performed in 2026?
As of September 11, 2026, SDSI is up 1.56% year-to-date (YTD), while IMTB has lost -1.48%. That puts SDSI better performer ahead so far this year.
Which ETF is attracting more investor money: SDSI or IMTB?
Year-to-date, the SDSI ETF saw +$143M in flows, compared to +$4M for IMTB.
Which ETF is more volatile: SDSI or IMTB?
Over the past year, SDSI had a volatility of 1.23%, while IMTB experienced 3.94%.
Which ETF is bigger: SDSI or IMTB?
As of September 11, 2026, SDSI holds $296.85 M in assets under management (AUM), while IMTB manages $269.82 M.
What sectors do the SDSI and IMTB ETFs invest in?
SDSI leans toward sectors like Finance and Sovereign. Meanwhile, IMTB focuses on Sovereign, Industrials and Non-Corporate.
What are the top holdings of the SDSI ETF and IMTB ETF?
SDSI top holdings include USA, Notes 4% 31oct2029, USD (R-2029), USA, Notes 4.25% 31jul2028, USD (BE-2028) and State Street Institutional US Government Money Market Fund. IMTB holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 4.375% 15may2034, USD (C-2034) and USA, Notes 4.25% 15aug2035, USD (E-2035).
Which ETF is more diversified: SDSI or IMTB?
SDSI holds 390 securities with 26.83% of its assets in the top 15. IMTB has 3452 securities and a top 15 weight of 23.24%.
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