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ETF · holdings as filed 2026-03-31

What's inside MBMDX?

MFS Maryland Municipal Bond Fund
Holdings
230
positions in the fund
Top 10
13%
of fund assets
Expense ratio
1.60%
net, per year
Fund size
$157M
total net assets

Top 20 holdings

RankLogoTicker / NameWeight
1
?
—MFS Institutional Money Market Portfolio
3.29%
2
M
MD MDSDEV 5 06.01.2048MARYLAND ECON DEV-A
1.33%
3
M
MD MDSDEV 5 07.01.2056MD ECON DEV CORP
1.26%
4
M
MD MON 11.01.2037MONTGOMERY CO-E
1.22%
5
M
MD MDSFAC 5 05.01.2035MARYLAND ST STADIUM
1.15%
6
P
PR PRCGEN 5 07.01.2058PR SALES TAX FING-A1
1.11%
7
M
MD PRI 5 08.01.2045PRINCE GEORGE CO-A
1.03%
8
D
DC DCTTRN 5 07.15.2040WASHINGTON MET AREA-A
1.03%
9
M
MD MDSEDU 5 06.01.2046MARYLAND STADIUM AUTH
1.01%
10
M
MD AAR 5 10.01.2053ANNE ARUNDEL CO
1.00%
11
M
MD MDSMED 5.25 05.15.2055MD HLTH & HGR EDL-A
1.00%
12
M
MD MDSMED 5.25 08.15.2051MD HLTH HGR AUTH-A
1.00%
13
M
MD PRICTF 5 10.01.2048PRINCE GEORGES
0.98%
14
M
MD COMMFH 4.85 06.01.2046MD CMNTY DEV-F-1
0.97%
15
M
MD MDSEDU 4 06.01.2041MARYLAND STADIUM AUTH
0.96%
16
M
MD WASUTL 4.38 06.01.2049WA SUBURBAN SAN DT
0.94%
17
M
MD BAL 4 03.01.2045BALTIMORE CNTY MD
0.94%
18
M
MD HOW 4 02.15.2048HOWARD CO-C
0.92%
19
M
MD MDSMED 4 07.01.2042MARYLAND HLTH & HGR
0.90%
20
M
MD MDSMED 5 07.01.2034MD H/E-PKG-JOHNS HOPK
0.90%
Sectors
Top holdings — Bonds & Fixed Income
Your 10 largest positions in this sector
1
M
MD MDSDEV 5 06.01.2048MARYLAND ECON DEV-A
1.33%
2
M
MD MDSDEV 5 07.01.2056MD ECON DEV CORP
1.26%
3
M
MD MON 11.01.2037MONTGOMERY CO-E
1.22%
4
M
MD MDSFAC 5 05.01.2035MARYLAND ST STADIUM
1.15%
5
P
PR PRCGEN 5 07.01.2058PR SALES TAX FING-A1
1.11%
6
M
MD PRI 5 08.01.2045PRINCE GEORGE CO-A
1.03%
7
D
DC DCTTRN 5 07.15.2040WASHINGTON MET AREA-A
1.03%
8
M
MD MDSEDU 5 06.01.2046MARYLAND STADIUM AUTH
1.01%
9
M
MD AAR 5 10.01.2053ANNE ARUNDEL CO
1.00%
10
M
MD MDSMED 5.25 05.15.2055MD HLTH & HGR EDL-A
1.00%
Geography
Top holdings — United States
Your 10 largest positions in this country
1
M
MD MDSDEV 5 06.01.2048MARYLAND ECON DEV-A
1.33%
2
M
MD MDSDEV 5 07.01.2056MD ECON DEV CORP
1.26%
3
M
MD MON 11.01.2037MONTGOMERY CO-E
1.22%
4
M
MD MDSFAC 5 05.01.2035MARYLAND ST STADIUM
1.15%
5
P
PR PRCGEN 5 07.01.2058PR SALES TAX FING-A1
1.11%
6
M
MD PRI 5 08.01.2045PRINCE GEORGE CO-A
1.03%
7
D
DC DCTTRN 5 07.15.2040WASHINGTON MET AREA-A
1.03%
8
M
MD MDSEDU 5 06.01.2046MARYLAND STADIUM AUTH
1.01%
9
M
MD AAR 5 10.01.2053ANNE ARUNDEL CO
1.00%
10
M
MD MDSMED 5.25 05.15.2055MD HLTH & HGR EDL-A
1.00%
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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Funds similar to MBMDX
MBSCXMFS South Carolina Municipal Bond Fund
13% overlap
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MBVAXMFS Virginia Municipal Bond Fund
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MDXBXT. Rowe Price Maryland Tax-Free Bond Fund
12% overlap
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MBNCXMFS North Carolina Municipal Bond Fund
12% overlap
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MBGAXMFS Georgia Municipal Bond Fund
10% overlap
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MBMAXMFS Massachusetts Municipal Bond Fund
9% overlap
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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.