SMBSvsSPMBETF Comparison
VS
ETF 2
SPMB
State Street State Street SPDR Portfolio Mortgage Backed Bond ETF
This fund is part of
MBS & ABS
-0.3%
Schwab Mortgage-Backed Securities ETF (SMBS) and State Street State Street SPDR Portfolio Mortgage Backed Bond ETF (SPMB) belong to the same industry segment: MBS & ABS. Both ETFs have the same top 3 sector exposures: Industrials, Finance and Government Agencies. SMBS is less expensive with a Total Expense Ratio (TER) of 0.03%, versus 0.04% for SPMB. SMBS is down -0.06% year-to-date (YTD) with +$891M in YTD flows. SPMB performs worse with -0.27% YTD performance, and +$644M in YTD flows. Run a side-by-side ETF comparison of SMBS and SPMB 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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SMBS vs SPMB performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SMBS SPMB | -0.11%-0.12% | -0.85%-0.96% | -0.06%-0.27% | +2.96%+2.85% | n/a+14.44% | n/a+0.23% |
| Flows | SMBS SPMB | +$120M+$169M | +$287M+$305M | +$891M+$644M | +$1.28B+$941M | -+$2.57B | -+$3.68B |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SMBS SPMB | +4.44%+4.72% | +3.94%+4.27% | n/a+5.94% | n/a+6.71% |
| Max drawdown | SMBS SPMB | -1.75%-1.90% | -2.67%-2.98% | n/a-5.55% | n/a-17.38% |
| Max drawdown duration | SMBS SPMB | 64d64d | 184d184d | n/a84d | n/a1500d |
Trading data
SMBS | SPMB | |
Last sale 9/2/2026 at 1:30 PM | $24.79 | $21.82 |
| Previous close 09/01/2026 | $24.78 | $21.82 |
| Consolidated volume 09/01/2026 | ||
| 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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SMBS | SPMB | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
SMBS | SPMB | |
|---|---|---|
| Last price | $24.79 | $21.82 |
| 1D performance | +0.06% | +0.00% |
| AuM | $6.53 B | $7.09 B |
| E/R | 0.03% | 0.04% |
Characteristics
SMBS | SPMB | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | Schwab ETFs | State Street Investment Management |
| Benchmark | Bloomberg U.S. MBS Float Adjusted Index | Bloomberg U.S. MBS Index |
| N° of holdings | 443 | 554 |
| Asset class | Bonds | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | November 19, 2024 | January 15, 2009 |
| ESG | No | No |
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Exposure
Countries
SMBS
USA
34%
Other
66%
SPMB
USA
32.64%
Other
67.36%
Sectors
SMBS
Industrials
33.45%
Other
66.55%
SPMB
Industrials
32.31%
Other
67.69%
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Diversification
SMBS
Total weight of top 15 holdings out of 15
5.64%
SPMB
Total weight of top 15 holdings out of 15
9.28%
Top 15 holdings
Data as of July 31, 2026
SMBS
G2 MB0025, 5% 20nov2054, USD (ABS)
0.67%
FR SD8469, 5.5% 1oct2054, USD (ABS)
0.49%
US31418DYX47
0.40%
US31427R6E50
0.39%
FR SD8193, 2% 1feb2052, USD (ABS)
0.37%
FR SD8106, 2% 1nov2050, USD (ABS)
0.35%
US3618N6HU47
0.35%
US3618N56H72
0.35%
US3618N53X59
0.35%
FR RQ0110, 5% 1apr2056, USD (ABS)
0.34%
FR RQ0102, 5% 1mar2056, USD (ABS)
0.34%
US3132DWDC47
0.33%
FR SD7552, 2.5% 1jan2052, USD (ABS)
0.31%
US3142J6BK85
0.30%
US3132DWAN39
0.30%
SPMB
US3142J6C840
1.16%
US01F0526800
0.86%
FN MA4547, 2% 1feb2052, USD (ABS)
0.78%
US3142J6BK85
0.76%
US01F0506844
0.70%
FR SD8212, 2.5% 1may2052, USD (ABS)
0.60%
US3132DWMY65
0.55%
G2 MB0424, 5.5% 20jun2055, USD (ABS)
0.54%
FN MA4701, 4.5% 1aug2052, USD (ABS)
0.51%
US01F0606834
0.50%
US21H0506806
0.49%
FN FA0608, 5.5% 1feb2055, USD (ABS)
0.49%
FN MA4465, 2% 1nov2051, USD (ABS)
0.47%
FN FS2040, 2% 1feb2052, USD (ABS)
0.44%
US3132DWKV45
0.43%
Frequently asked questions about SMBS and SPMB
How have the SMBS and SPMB ETFs performed in 2026?
As of September 1, 2026, SMBS is down -0.06% year-to-date (YTD), while SPMB has lost -0.27%. That puts SMBS better performer ahead so far this year.
Which ETF is attracting more investor money: SMBS or SPMB?
Year-to-date, the SMBS ETF saw +$891M in flows, compared to +$644M for SPMB.
Which ETF is more volatile: SMBS or SPMB?
Over the past year, SMBS had a volatility of 3.94%, while SPMB experienced 4.27%.
Which ETF is bigger: SMBS or SPMB?
As of September 1, 2026, SMBS holds $6.53 B in assets under management (AUM), while SPMB manages $7.09 B.
What sectors do the SMBS and SPMB ETFs invest in?
SMBS leans toward sectors like Industrials. Meanwhile, SPMB focuses on Industrials.
What are the top holdings of the SMBS ETF and SPMB ETF?
SMBS top holdings include G2 MB0025, 5% 20nov2054, USD (ABS), FR SD8469, 5.5% 1oct2054, USD (ABS) and US31418DYX47. SPMB holds in its top three: US3142J6C840, US01F0526800 and FN MA4547, 2% 1feb2052, USD (ABS).
Which ETF is more diversified: SMBS or SPMB?
SMBS holds 1999 securities with 5.64% of its assets in the top 15. SPMB has 2713 securities and a top 15 weight of 9.28%.
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