JMSTvsMBBAETF Comparison
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JPMorgan Ultra-Short Municipal Income ETF (JMST) belongs to the Municipal Bonds segment. iShares Mortgage-Backed Securities Active ETF (MBBA) is part of the MBS & ABS segment. JMST's top 2 sector exposures are Municipal and Sovereign. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. JMST 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 JMST 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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JMST vs MBBA performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | JMST MBBA | -0.02%-1.54% | +0.32%-2.41% | +1.37%n/a | +2.02%n/a | +9.78%n/a | +12.16%n/a |
| Flows | JMST MBBA | +$290M+$5M | +$898M+$19M | +$1.07B- | +$2.82B- | +$4.88B- | +$5.31B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | JMST MBBA | +0.40%+4.82% | +0.34%n/a | +0.40%n/a | +0.43%n/a |
| Max drawdown | JMST MBBA | -0.16%-2.94% | -0.16%n/a | -0.46%n/a | -0.93%n/a |
| Max drawdown duration | JMST MBBA | 11d74d | 11dn/a | 29dn/a | 435dn/a |
Trading data
JMST | MBBA | |
Last sale 9/11/2026 at 1:30 PM | $48.02 | |
| Previous close 09/10/2026 | $48.08 | |
| Consolidated volume 09/10/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
JMST | MBBA | |
|---|---|---|
| Last price | – | $48.02 |
| 1D performance | – | -0.13% |
| AuM | $7.43 B | $155.32 M |
| E/R | 0.18% | 0.26% |
Characteristics
JMST | MBBA | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | J.P. Morgan Asset Management | iShares |
| Benchmark | - | - |
| N° of holdings | 523 | 25 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | October 16, 2018 | January 23, 2026 |
| ESG | No | No |
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Exposure
Countries
JMST
USA
27.09%
Other
72.91%
MBBA
Data will be available soon
Sectors
JMST
Municipal
24.94%
Other
75.06%
MBBA
Data will be available soon
Diversification
JMST
Total weight of top 15 holdings out of 15
12.23%
MBBA
Data will be available soon
Top 15 holdings
Data as of July 31, 2026
JMST
USA, Bills 0% 11aug2026, USD (119D)
2.16%
US64972GZB30
0.98%
US93974FDR10
0.85%
US01170PBW59
0.81%
US60412A2K82
0.74%
US424092HZ03
0.71%
US644894QC44
0.68%
US6492284K61
0.68%
US9788624C19
0.68%
US57421CHW73
0.68%
US650860AZ26
0.67%
US543077YT22
0.67%
US083773EE76
0.65%
US87638TEH23
0.64%
District of Columbia, FRN 1jun2051, USD (2026C)
0.64%
MBBA
Data will be available soon
Frequently asked questions about JMST and MBBA
Which ETF is bigger: JMST or MBBA?
As of September 11, 2026, JMST holds $7.43 B in assets under management (AUM), while MBBA manages $155.32 M.
What sectors do the JMST and MBBA ETFs invest in?
JMST leans toward sectors like Municipal. Meanwhile, MBBA focuses on Industrials and Non-Corporate.
What are the top holdings of the JMST ETF and MBBA ETF?
JMST top holdings include USA, Bills 0% 11aug2026, USD (119D), US64972GZB30 and US93974FDR10. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.
Which ETF is more diversified: JMST or MBBA?
JMST holds 1623 securities with 12.23% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.
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