SPMBvsSMBSETF Comparison
ETF 1
SPMB
State Street State Street SPDR Portfolio Mortgage Backed Bond ETF
This fund is part of
MBS & ABS
-0.05%
VS
State Street State Street SPDR Portfolio Mortgage Backed Bond ETF (SPMB) and Schwab Mortgage-Backed Securities ETF (SMBS) belong to the same industry segment: MBS & ABS. Both ETFs have the same top 3 sector exposures: Industrials, Finance and Government Agencies. SPMB is more expensive with a Total Expense Ratio (TER) of 0.04%, versus 0.03% for SMBS. SPMB is down -1.42% year-to-date (YTD) with +$655M in YTD flows. SMBS performs better with -1.21% YTD performance, and +$842M in YTD flows. Run a side-by-side ETF comparison of SPMB and SMBS 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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SPMB vs SMBS performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/15/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | SPMB SMBS | -1.55%-1.54% | -2.41%-2.27% | -1.42%-1.21% | -0.55%-0.24% | +13.73%n/a | -0.90%n/a |
| Flows | SPMB SMBS | +$53M+$18M | +$236M+$174M | +$655M+$842M | +$936M+$1.23B | +$2.59B- | +$3.74B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | SPMB SMBS | +4.82%+4.55% | +4.25%+3.94% | +5.94%n/a | +6.72%n/a |
| Max drawdown | SPMB SMBS | -2.90%-2.74% | -3.51%-3.15% | -5.40%n/a | -17.32%n/a |
| Max drawdown duration | SPMB SMBS | 78d78d | 198d198d | 318dn/a | 1491dn/a |
Trading data
SPMB | SMBS | |
Last sale 9/16/2026 at 1:30 PM | $21.52 | $24.45 |
| Previous close 09/15/2026 | $21.55 | $24.50 |
| Consolidated volume 09/15/2026 | ||
| 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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SPMB | SMBS | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/16/2026 at 1:30 PM
Live
Closed
SPMB | SMBS | |
|---|---|---|
| Last price | $21.52 | $24.45 |
| 1D performance | -0.14% | -0.18% |
| AuM | $7.02 B | $6.41 B |
| E/R | 0.04% | 0.03% |
Characteristics
SPMB | SMBS | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | Schwab ETFs |
| Benchmark | Bloomberg U.S. MBS Index | Bloomberg U.S. MBS Float Adjusted Index |
| N° of holdings | 554 | 443 |
| Asset class | Bonds | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | January 15, 2009 | November 19, 2024 |
| ESG | No | No |
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Exposure
Countries
SPMB
USA
32.64%
Other
67.36%
SMBS
USA
34%
Other
66%
Sectors
SPMB
Industrials
32.31%
Other
67.69%
SMBS
Industrials
33.45%
Other
66.55%
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Diversification
SPMB
Total weight of top 15 holdings out of 15
9.28%
SMBS
Total weight of top 15 holdings out of 15
5.64%
Top 15 holdings
Data as of July 31, 2026
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%
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%
Frequently asked questions about SPMB and SMBS
How have the SPMB and SMBS ETFs performed in 2026?
As of September 15, 2026, SPMB is down -1.42% year-to-date (YTD), while SMBS has lost -1.21%. That puts SMBS better performer ahead so far this year.
Which ETF is attracting more investor money: SPMB or SMBS?
Year-to-date, the SPMB ETF saw +$655M in flows, compared to +$842M for SMBS.
Which ETF is more volatile: SPMB or SMBS?
Over the past year, SPMB had a volatility of 4.25%, while SMBS experienced 3.94%.
Which ETF is bigger: SPMB or SMBS?
As of September 15, 2026, SPMB holds $7.02 B in assets under management (AUM), while SMBS manages $6.41 B.
What sectors do the SPMB and SMBS ETFs invest in?
SPMB leans toward sectors like Industrials. Meanwhile, SMBS focuses on Industrials.
What are the top holdings of the SPMB ETF and SMBS ETF?
SPMB top holdings include US3142J6C840, US01F0526800 and FN MA4547, 2% 1feb2052, USD (ABS). SMBS holds in its top three: G2 MB0025, 5% 20nov2054, USD (ABS), FR SD8469, 5.5% 1oct2054, USD (ABS) and US31418DYX47.
Which ETF is more diversified: SPMB or SMBS?
SPMB holds 2713 securities with 9.28% of its assets in the top 15. SMBS has 1999 securities and a top 15 weight of 5.64%.
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