IBMXvsMFSMETF Comparison
VS
iShares iBonds Dec 2035 Term Muni Bond ETF (IBMX) and MFS Active Intermediate Muni Bond ETF (MFSM) belong to the same industry segment: Municipal Bonds. IBMX's top 2 sector exposures are Municipal and Non-Corporate. In contrast, MFSM's top sector exposures are Municipal. IBMX is less expensive with a Total Expense Ratio (TER) of 0.1%, versus 0.34% for MFSM. Run a side-by-side ETF comparison of IBMX and MFSM 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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IBMX vs MFSM performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 09/11/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | IBMX MFSM | -2.95%-2.52% | -3.95%-2.93% | n/a-1.14% | n/a+0.85% | n/an/a | n/an/a |
| Flows | IBMX MFSM | +$1M+$2M | +$1M+$7M | -+$53M | -+$57M | -- | -- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | IBMX MFSM | +3.73%+2.94% | n/a+2.33% | n/an/a | n/an/a |
| Max drawdown | IBMX MFSM | -4.76%-3.53% | n/a-3.53% | n/an/a | n/an/a |
| Max drawdown duration | IBMX MFSM | 67d66d | n/a66d | n/an/a | n/an/a |
Trading data
IBMX | MFSM | |
Last sale 9/11/2026 at 1:30 PM | $23.78 | $24.16 |
| Previous close 09/10/2026 | $23.75 | $24.14 |
| Consolidated volume 09/10/2026 | ||
| 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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MFSM
is actively managed and doesn’t replicate an indexIBMX | MFSM | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 9/11/2026 at 1:30 PM
Live
Closed
IBMX | MFSM | |
|---|---|---|
| Last price | $23.78 | $24.16 |
| 1D performance | +0.13% | +0.10% |
| AuM | $5.96 M | $101.93 M |
| E/R | 0.1% | 0.34% |
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Exposure
Countries
IBMX
USA
26.56%
Other
73.44%
MFSM
USA
27.33%
Other
72.67%
Sectors
IBMX
Municipal
25.8%
Other
74.2%
MFSM
Municipal
27.33%
Other
72.67%
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Diversification
IBMX
Total weight of top 15 holdings out of 15
25.78%
MFSM
Total weight of top 15 holdings out of 15
10.5%
Top 15 holdings
Data as of July 31, 2026
IBMX
California, 5% 1oct2035, USD
3.08%
University of Texas, 5% 15aug2036, USD (2025B)
2.56%
Massachusetts Development Finance Agency, 5% 15may2055, USD (2025A-2)
2.31%
US677523RD66
2.21%
University of California, 5% 15may2038, USD (2025)
1.83%
Maryland, 5% 1jun2039, USD (2025)
1.81%
Los Angeles Unified School District, 5% 1jul2039, USD (2024QRR)
1.57%
Texas Transportation Commission, 5% 1oct2036, USD (2025)
1.50%
US59261AY925
1.47%
California, 5% 1sep2035, USD
1.40%
US684554GB85
1.36%
US207758Z305
1.26%
US64990KHR77
1.15%
State of Washington, 5% 1aug2039, USD (2025D)
1.14%
US64972JXD52
1.14%
MFSM
US49126RAC07
1.00%
US60416UV512
0.94%
Oklahoma Public Property Authority, 5% 1jun2034, USD (2026)
0.83%
Missouri Health and Educational Facilities Authority, 5% 1apr2036, USD (2026A)
0.83%
US708692CB22
0.75%
California Community Choice Financing Authority, 5% 1dec2055, USD (2025C)
0.72%
US763056DQ86
0.72%
US702538FE43
0.71%
US95235TAW36
0.69%
Paulding Hospital Authority, 5% 1apr2036, USD
0.55%
St. Cloud, 5% 1may2036, USD (2026)
0.55%
US164555EB63
0.55%
US49121DAB82
0.55%
US75989FAM59
0.55%
St. Tammany Parish Hospital Service District №1, 5% 1jul2056, USD (2026A)
0.55%
Frequently asked questions about IBMX and MFSM
Which ETF is bigger: IBMX or MFSM?
As of September 11, 2026, IBMX holds $5.96 M in assets under management (AUM), while MFSM manages $101.93 M.
What sectors do the IBMX and MFSM ETFs invest in?
IBMX leans toward sectors like Municipal. Meanwhile, MFSM focuses on Municipal.
What are the top holdings of the IBMX ETF and MFSM ETF?
IBMX top holdings include California, 5% 1oct2035, USD, University of Texas, 5% 15aug2036, USD (2025B) and Massachusetts Development Finance Agency, 5% 15may2055, USD (2025A-2). MFSM holds in its top three: US49126RAC07, US60416UV512 and Oklahoma Public Property Authority, 5% 1jun2034, USD (2026).
Which ETF is more diversified: IBMX or MFSM?
IBMX holds 135 securities with 25.78% of its assets in the top 15. MFSM has 409 securities and a top 15 weight of 10.5%.
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Latest news about IBMX & MFSM
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