TMNSvsMBBAETF Comparison
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T. Rowe Price Short Municipal Income ETF (TMNS) belongs to the Municipal Bonds segment. iShares Mortgage-Backed Securities Active ETF (MBBA) is part of the MBS & ABS segment. TMNS's top 1 sector exposures are Municipal. In contrast, MBBA's top sector exposures are Industrials and Non-Corporate. TMNS 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 TMNS 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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TMNS 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. | TMNS MBBA | +0.18%-0.09% | +0.18%-1.02% | +1.25%n/a | n/an/a | n/an/a | n/an/a |
| Flows | TMNS MBBA | +$1M+$5M | +$2M+$35M | +$2M- | -- | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | TMNS MBBA | +1.12%+4.75% | n/an/a | n/an/a | n/an/a |
| Max drawdown | TMNS MBBA | -0.76%-2.02% | n/an/a | n/an/a | n/an/a |
| Max drawdown duration | TMNS MBBA | 57d65d | n/an/a | n/an/a | n/an/a |
Trading data
TMNS | MBBA | |
Last sale 9/3/2026 at 1:30 PM | $49.62 | $48.60 |
| Previous close 09/02/2026 | $49.67 | $48.54 |
| 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 9/3/2026 at 1:30 PM
Live
Closed
TMNS | MBBA | |
|---|---|---|
| Last price | $49.62 | $48.60 |
| 1D performance | -0.08% | +0.13% |
| AuM | $23.58 M | $156.37 M |
| E/R | 0.18% | 0.26% |
Characteristics
TMNS | MBBA | |
|---|---|---|
| Management strategy | Active | Active |
| Provider | T. Rowe Price | iShares |
| Benchmark | - | - |
| N° of holdings | 56 | 25 |
| Asset class | - | - |
| Trailing 12m distribution yield | Join | Join |
| Inception date | November 19, 2025 | January 23, 2026 |
| ESG | No | No |
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Exposure
Countries
TMNS
USA
31.14%
Other
68.86%
MBBA
Data will be available soon
Sectors
TMNS
Municipal
31.14%
Other
68.86%
MBBA
Data will be available soon
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Diversification
TMNS
Total weight of top 15 holdings out of 15
28.33%
MBBA
Data will be available soon
Top 15 holdings
Data as of July 31, 2026
TMNS
US425507GL89
3.14%
US23503CFK80
2.35%
US735240L842
2.25%
New York Housing Finance Agency, FRN 1may2049, USD
2.21%
US09182TCG04
1.98%
California Community Choice Financing Authority, 5.5% 1oct2054, USD (2023F)
1.93%
US650116DJ25
1.88%
US735389D620
1.77%
New York Mortgage Agency, 3.4% 1oct2030, USD
1.74%
Illinois Toll Highway Authority, 5% 1jan2031, USD
1.64%
US546068AZ00
1.63%
US64988YQ831
1.48%
US04052FDU66
1.46%
Puerto Rico, 5.75% 1jul2031, USD
1.45%
US187145WS29
1.43%
MBBA
Data will be available soon
Frequently asked questions about TMNS and MBBA
Which ETF is bigger: TMNS or MBBA?
As of September 1, 2026, TMNS holds $23.58 M in assets under management (AUM), while MBBA manages $156.37 M.
What sectors do the TMNS and MBBA ETFs invest in?
TMNS leans toward sectors like Municipal. Meanwhile, MBBA focuses on Industrials and Non-Corporate.
What are the top holdings of the TMNS ETF and MBBA ETF?
TMNS top holdings include US425507GL89, US23503CFK80 and US735240L842. MBBA holds in its top three: US01F0526800, US01F0206874 and BlackRock Liquidity T-Fund.
Which ETF is more diversified: TMNS or MBBA?
TMNS holds 183 securities with 28.33% of its assets in the top 15. MBBA has 491 securities and a top 15 weight of 89.36%.
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