ETF · holdings as filed 2026-03-31
What's inside MBMAX?
MFS Massachusetts Municipal Bond Fund
- Holdings
- 269
- positions in the fund
- Top 10
- 12%
- of fund assets
- Expense ratio
- 1.57%
- net, per year
- Fund size
- $409M
- total net assets
Top 20 holdings
| Rank | Logo | Ticker / Name | Weight | |
|---|---|---|---|---|
| 1 | ? | —MFS Institutional Money Market Portfolio | 1.68% | |
| 2 | M  | MA MASDEV 5 07.01.2042MA DEV FIN AGY-N-REF | 1.37% | |
| 3 | M  | MA MASTRN 5 06.01.2048MA CMWLTH-A | 1.30% | |
| 4 | M  | MA MASDEV 5.25 07.01.2050MA DEV FIN AGY-N-1 | 1.24% | |
| 5 | M  | MA MASWTR 5 02.01.2048MA CLEAN WTR TRUST-27 | 1.05% | |
| 6 | M  | MA MASTRN 5.25 07.01.2055MA ST BAY AUTH-SER B | 1.04% | |
| 7 | M  | MA MAS 5 08.01.2049MA CMNWLTH-F | 1.03% | |
| 8 | M  | MA MASEDU 5 02.15.2044MASSACHUSETTS ST SCH | 1.03% | |
| 9 | M  | MA MASEDU 5 02.15.2050MA SCH BLDG AUTH-A | 1.02% | |
| 10 | M  | MA MASTRN 5 06.01.2053MASS CMNWLTH-A | 1.02% | |
| 11 | M  | MA TRIHGR 4 06.01.2044TRI-CO REGL VOTECH SD | 0.96% | |
| 12 | M  | MA MASDEV 4 10.01.2045MASSACHUSETTS ST DEV | 0.91% | |
| 13 | P  | PR PRCGEN 5 07.01.2058PR SALES TAX FING-A1 | 0.90% | |
| 14 | M  | MA MASDEV 5.25 11.01.2051MA DEV FIN AGY-G-REF | 0.89% | |
| 15 | M  | MA MASTRN 5 07.01.2042MASSACHUSETTS PORT-A | 0.89% | |
| 16 | M  | MA MASDEV 4.25 07.01.2055MA DEV FIN AGY-REF | 0.89% | |
| 17 | M  | MA TIS 3 08.15.2052TISBURY TWN | 0.88% | |
| 18 | M  | MA MASHSG 5.5 12.01.2052MA HSG FIN AGY-225 | 0.87% | |
| 19 | M  | MA MASTRN 5.25 07.01.2047MA ST BAY AUTH-SER B | 0.80% | |
| 20 | M  | MA MASEDU 3.75 07.01.2047MA EDUCTNL FING AUTH | 0.79% |
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
M
MA MASDEV 5 07.01.2042MA DEV FIN AGY-N-REF
1.37%2
M
MA MASTRN 5 06.01.2048MA CMWLTH-A
1.30%3
M
MA MASDEV 5.25 07.01.2050MA DEV FIN AGY-N-1
1.24%4
M
MA MASWTR 5 02.01.2048MA CLEAN WTR TRUST-27
1.05%5
M
MA MASTRN 5.25 07.01.2055MA ST BAY AUTH-SER B
1.04%6
M
MA MAS 5 08.01.2049MA CMNWLTH-F
1.03%7
M
MA MASEDU 5 02.15.2044MASSACHUSETTS ST SCH
1.03%8
M
MA MASEDU 5 02.15.2050MA SCH BLDG AUTH-A
1.02%9
M
MA MASTRN 5 06.01.2053MASS CMNWLTH-A
1.02%10
M
MA TRIHGR 4 06.01.2044TRI-CO REGL VOTECH SD
0.96%Top holdings — United States
Your 10 largest positions in this country
1
M
MA MASDEV 5 07.01.2042MA DEV FIN AGY-N-REF
1.37%2
M
MA MASTRN 5 06.01.2048MA CMWLTH-A
1.30%3
M
MA MASDEV 5.25 07.01.2050MA DEV FIN AGY-N-1
1.24%4
M
MA MASWTR 5 02.01.2048MA CLEAN WTR TRUST-27
1.05%5
M
MA MASTRN 5.25 07.01.2055MA ST BAY AUTH-SER B
1.04%6
M
MA MAS 5 08.01.2049MA CMNWLTH-F
1.03%7
M
MA MASEDU 5 02.15.2044MASSACHUSETTS ST SCH
1.03%8
M
MA MASEDU 5 02.15.2050MA SCH BLDG AUTH-A
1.02%9
M
MA MASTRN 5 06.01.2053MASS CMNWLTH-A
1.02%10
M
MA TRIHGR 4 06.01.2044TRI-CO REGL VOTECH SD
0.96%Geography reflects each issuer's registered business address per SEC EDGAR filings where available, falling back to the exchange or listing where no SEC filing exists — not necessarily where a company's stock is primarily listed (e.g. TSMC is classified as Taiwan even though its ADR trades on the NYSE).
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Data source: official SEC Form N-PORT filings (as of 2026-03-31); expense ratio from SEC prospectus (risk/return) filings. Fund holdings are disclosed quarterly and may reflect a 60-day reporting delay.
Informational and educational only — not investment advice.
Informational and educational only — not investment advice.