SMTHvsIUSBETF Comparison
VS
ALPS Smith Core Plus Bond ETF (SMTH) and iShares Core Total USD Bond Market ETF (IUSB) belong to the same industry segment: US Aggregate Bonds. Both ETFs have the same top 3 sector exposures: Sovereign, Finance and Industrials. SMTH is more expensive with a Total Expense Ratio (TER) of 0.59%, versus 0.06% for IUSB. SMTH is down -1.61% year-to-date (YTD) with +$1.42B in YTD flows. IUSB performs better with -1.42% YTD performance, and +$16.70B in YTD flows. Run a side-by-side ETF comparison of SMTH and IUSB 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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SMTH vs IUSB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/16/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SMTH IUSB | -0.34%-0.19% | -1.90%-1.78% | -1.61%-1.42% | -1.79%-1.37% | n/a+16.28% | n/a+0.06% |
| Flows | SMTH IUSB | +$641M+$6.05B | +$769M+$7.66B | +$1.42B+$16.70B | +$1.63B+$18.01B | -+$27.91B | -+$37.54B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SMTH IUSB | +4.09%+4.15% | +3.67%+3.66% | n/a+4.63% | n/a+5.55% |
| Max drawdown | SMTH IUSB | -3.25%-3.24% | -4.53%-4.33% | n/a-4.33% | n/a-17.40% |
| Max drawdown duration | SMTH IUSB | 52d52d | 229d229d | n/a280d | n/a1406d |
Trading data
SMTH | IUSB | |
Last sale 10/16/2026 at 1:30 PM | $24.78 | $44.47 |
| Previous close 10/15/2026 | $24.75 | $44.47 |
| 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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SMTH
is actively managed and doesn’t replicate an indexSMTH | IUSB | |
|---|---|---|
| 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
SMTH | IUSB | |
|---|---|---|
| Last price | $24.78 | $44.47 |
| 1D performance | +0.12% | +0.00% |
| AuM | $3.63 B | $49.25 B |
| E/R | 0.59% | 0.06% |
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Exposure
Countries
SMTH
USA
75.22%
Other
24.78%
IUSB
USA
72.98%
Other
27.02%
Sectors
SMTH
Sovereign
39.91%
Finance
12.14%
Industrials
7.25%
Other
40.69%
IUSB
Sovereign
42.65%
Finance
13.17%
Other
44.17%
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Diversification
SMTH
Total weight of top 15 holdings out of 15
45.38%
IUSB
Total weight of top 15 holdings out of 15
9.55%
Top 15 holdings
Data as of August 31, 2026
SMTH
USA, Notes 3.375% 29feb2028, USD (AY-2028)
5.02%
USA, Notes 4.375% 15may2036, USD (C-2036)
4.82%
USA, Notes 4% 31may2028, USD (BC-2028)
4.14%
USA, Bonds 4.625% 15nov2045, USD
3.94%
USA, Notes 4.125% 31oct2029, USD (AF-2029)
3.89%
US91282CRF04
3.78%
US91282CRG86
3.41%
USA, Bonds 5% 15may2056, USD
3.03%
USA, Bonds 4.625% 15nov2055, USD
2.89%
USA, Notes 2.25% 15nov2027, USD (F-2027)
2.71%
USA, Bonds 4.875% 15aug2045, USD
2.47%
USA, Bonds 4.75% 15aug2055, USD
2.10%
US912810UW61
1.24%
USA, Notes 4.25% 31jul2028, USD (BE-2028)
0.98%
USA, Notes 4.375% 31jul2031, USD (AB-2031)
0.98%
IUSB
BlackRock Liquidity TempCash
4.49%
USA, Notes 4% 15nov2035, USD (F-2035)
0.49%
US01F0206957
0.41%
USA, Notes 4.375% 31dec2029, USD (AH-2029)
0.37%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.36%
USA, Notes 4.125% 30jun2031, USD (AA-2031)
0.36%
USA, Notes 4% 15feb2034, USD (B-2034)
0.35%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.35%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.35%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.35%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.34%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.34%
USA, Notes 3.875% 15aug2034, USD (E-2034)
0.34%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.33%
USA, Notes 2.75% 15aug2032, USD (E-2032)
0.32%
Frequently asked questions about SMTH and IUSB
How have the SMTH and IUSB ETFs performed in 2026?
As of October 16, 2026, SMTH is down -1.61% year-to-date (YTD), while IUSB has lost -1.42%. That puts IUSB better performer ahead so far this year.
Which ETF is attracting more investor money: SMTH or IUSB?
Year-to-date, the SMTH ETF saw +$1.42B in flows, compared to +$16.70B for IUSB.
Which ETF is more volatile: SMTH or IUSB?
Over the past year, SMTH had a volatility of 3.67%, while IUSB experienced 3.66%.
Which ETF is bigger: SMTH or IUSB?
As of October 16, 2026, SMTH holds $3.63 B in assets under management (AUM), while IUSB manages $49.25 B.
What sectors do the SMTH and IUSB ETFs invest in?
SMTH leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, IUSB focuses on Sovereign and Finance.
What are the top holdings of the SMTH ETF and IUSB ETF?
SMTH top holdings include USA, Notes 3.375% 29feb2028, USD (AY-2028), USA, Notes 4.375% 15may2036, USD (C-2036) and USA, Notes 4% 31may2028, USD (BC-2028). IUSB holds in its top three: BlackRock Liquidity TempCash, USA, Notes 4% 15nov2035, USD (F-2035) and US01F0206957.
Which ETF is more diversified: SMTH or IUSB?
SMTH holds 925 securities with 45.38% of its assets in the top 15. IUSB has 18013 securities and a top 15 weight of 9.55%.
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Latest news about SMTH & IUSB
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