SMTHvsSPABETF Comparison
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ALPS Smith Core Plus Bond ETF (SMTH) and State Street SPDR Portfolio Aggregate Bond ETF (SPAB) 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 0.03% for SPAB. SMTH is down -1.61% year-to-date (YTD) with +$1.42B in YTD flows. SPAB performs better with -1.55% YTD performance, and +$1.57B in YTD flows. Run a side-by-side ETF comparison of SMTH and SPAB 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 SPAB 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 SPAB | -0.34%-0.06% | -1.90%-1.75% | -1.61%-1.55% | -1.79%-1.68% | n/a+14.97% | n/a-1.79% |
| Flows | SMTH SPAB | +$641M+$530M | +$769M+$858M | +$1.42B+$1.57B | +$1.63B+$2.03B | -+$3.57B | -+$5.17B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SMTH SPAB | +4.09%+4.38% | +3.67%+3.86% | n/a+4.97% | n/a+5.98% |
| Max drawdown | SMTH SPAB | -3.25%-3.30% | -4.53%-4.68% | n/a-4.87% | n/a-17.44% |
| Max drawdown duration | SMTH SPAB | 52d52d | 229d229d | n/a284d | n/a1556d |
Trading data
SMTH | SPAB | |
Last sale 10/16/2026 at 1:30 PM | $24.78 | $24.59 |
| Previous close 10/15/2026 | $24.75 | $24.59 |
| 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 | SPAB | |
|---|---|---|
| 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 | SPAB | |
|---|---|---|
| Last price | $24.78 | $24.59 |
| 1D performance | +0.12% | +0.00% |
| AuM | $3.63 B | $10.42 B |
| E/R | 0.59% | 0.03% |
Characteristics
SMTH | SPAB | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | ALPS | State Street Investment Management |
| Benchmark | - | Bloomberg US Aggregate Bond Index |
| N° of holdings | 249 | 6931 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | December 5, 2023 | May 23, 2007 |
| ESG | No | No |
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Exposure
Countries
SMTH
USA
75.22%
Other
24.78%
SPAB
USA
74.49%
Other
25.51%
Sectors
SMTH
Sovereign
39.91%
Finance
12.14%
Industrials
7.25%
Other
40.69%
SPAB
Sovereign
45.89%
Finance
10.21%
Industrials
9.47%
Other
34.43%
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Diversification
SMTH
Total weight of top 15 holdings out of 15
45.38%
SPAB
Total weight of top 15 holdings out of 15
6.59%
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%
SPAB
USA, Notes 3.5% 15dec2028, USD (AV-2028)
0.74%
US91282CRJ26
0.58%
USA, Notes 3.625% 31dec2030, USD (AH-2030)
0.55%
US01F0526982
0.50%
USA, Notes 3.375% 30nov2027, USD (BL-2027)
0.45%
USA, Notes 4.375% 30nov2028, USD (AG-2028)
0.41%
USA, Notes 3.5% 31jan2028, USD (U-2028)
0.41%
USA, Notes 3.875% 31mar2031, USD (W-2031)
0.40%
US01F0506927
0.38%
USA, Notes 3.375% 31dec2027, USD (BM-2027)
0.37%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.37%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.37%
USA, Notes 3.625% 30sep2031, USD (Q-2031)
0.36%
USA, Notes 4% 15feb2034, USD (B-2034)
0.35%
USA, Notes 4% 30jun2032, USD (M-2032)
0.35%
Frequently asked questions about SMTH and SPAB
How have the SMTH and SPAB ETFs performed in 2026?
As of October 16, 2026, SMTH is down -1.61% year-to-date (YTD), while SPAB has lost -1.55%. That puts SPAB better performer ahead so far this year.
Which ETF is attracting more investor money: SMTH or SPAB?
Year-to-date, the SMTH ETF saw +$1.42B in flows, compared to +$1.57B for SPAB.
Which ETF is more volatile: SMTH or SPAB?
Over the past year, SMTH had a volatility of 3.67%, while SPAB experienced 3.86%.
Which ETF is bigger: SMTH or SPAB?
As of October 16, 2026, SMTH holds $3.63 B in assets under management (AUM), while SPAB manages $10.42 B.
What sectors do the SMTH and SPAB ETFs invest in?
SMTH leans toward sectors like Sovereign, Finance and Industrials. Meanwhile, SPAB focuses on Sovereign, Finance and Industrials.
What are the top holdings of the SMTH ETF and SPAB 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). SPAB holds in its top three: USA, Notes 3.5% 15dec2028, USD (AV-2028), US91282CRJ26 and USA, Notes 3.625% 31dec2030, USD (AH-2030).
Which ETF is more diversified: SMTH or SPAB?
SMTH holds 925 securities with 45.38% of its assets in the top 15. SPAB has 8475 securities and a top 15 weight of 6.59%.
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