AUSMvsMBBAETF Comparison
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Allspring Ultra Short Municipal ETF (AUSM) and iShares Mortgage-Backed Securities Active ETF (MBBA) have similar underlying exposures to countries and sectors. AUSM's top 1 sector exposures are Municipal. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. AUSM is less expensive with a Total Expense Ratio (TER) of 0.18%, versus 0.26% for MBBA. Run a side-by-side ETF comparison of AUSM and MBBA 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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AUSM vs MBBA performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/01/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | AUSM MBBA | +0.20%-0.09% | +0.54%-1.02% | +1.53%n/a | +2.50%n/a | n/an/a | n/an/a |
| Flows | AUSM MBBA | -+$5M | +$2M+$35M | +$3M- | +$7M- | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | AUSM MBBA | +0.39%+4.75% | +0.41%n/a | n/an/a | n/an/a |
| Max drawdown | AUSM MBBA | -0.15%-2.02% | -0.24%n/a | n/an/a | n/an/a |
| Max drawdown duration | AUSM MBBA | 20d65d | 37dn/a | n/an/a | n/an/a |
Trading data
AUSM | MBBA | |
Last sale 9/2/2026 at 1:30 PM | $25.02 | $48.54 |
| Previous close 09/02/2026 | $25.04 | $48.49 |
| Consolidated volume 09/02/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 9/2/2026 at 1:30 PM
Live
Closed
AUSM | MBBA | |
|---|---|---|
| Last price | $25.02 | $48.54 |
| 1D performance | -0.06% | +0.10% |
| AuM | $33.01 M | $156.37 M |
| E/R | 0.18% | 0.26% |
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Exposure
Countries
AUSM
USA
12.83%
Other
87.17%
MBBA
Data will be available soon
Sectors
AUSM
Municipal
12.83%
Other
87.17%
MBBA
Data will be available soon
Diversification
AUSM
Total weight of top 15 holdings out of 15
24.58%
MBBA
Data will be available soon
Top 15 holdings
Data as of July 31, 2026
AUSM
US46640KS620
2.27%
US44244CN944
2.12%
US20775DXK35
1.90%
US09025PFN15
1.56%
US7436006C72
1.54%
Chandler Industrial Development Authority, 4.1% 1dec2037, USD (2007)
1.53%
US167562SY49
1.53%
US67756CGH51
1.53%
US01179R6Z17
1.52%
US579729EW01
1.52%
US494053MA62
1.51%
US010050BV34
1.51%
US60700HUN78
1.51%
US469400DZ58
1.51%
US95345PAC23
1.51%
MBBA
Data will be available soon
Frequently asked questions about AUSM and MBBA
Which ETF is bigger: AUSM or MBBA?
As of September 1, 2026, AUSM holds $33.01 M in assets under management (AUM), while MBBA manages $156.37 M.
What sectors do the AUSM and MBBA ETFs invest in?
AUSM leans toward sectors like Municipal. Meanwhile, MBBA focuses on Industrials and Non-Corporate.
What are the top holdings of the AUSM ETF and MBBA ETF?
AUSM top holdings include US46640KS620, US44244CN944 and US20775DXK35. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.
Which ETF is more diversified: AUSM or MBBA?
AUSM holds 97 securities with 24.58% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.
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