FMB vs MUB: Differences, Returns & Fees

FMB's duration was 6.8 years on Jul 31, 2026 and MUB's 6.3 on May 31, 2026; MUB charges 0.05% to FMB's 0.39%. Net assets on Oct 9, 2026: $1.9bn for First Trust Managed Municipal ETF and $48.9bn for iShares National Muni Bond ETF.

MUB costs 0.34 points a year less; their one-year returns differ by 0.1 points; MUB is far larger, $48.9bn against $1.9bn.

FMBMUB
Expense ratio0.39%0.05%
Net assets$1.9bn$48.9bn
Total return, 1 year−2.1%−2.0%
What it tracksNo index, actively managedICE AMT-Free US National Municipal Index
Holdings in common1%
Below its high5.8%, high on Jul 6, 20265.3%, high on Jul 6, 2026

Holdings in common uses holdings dated May 31, 2026 and Jul 31, 2026.

−2.1%
FMB total return, 1 year
−2.0%
MUB total return, 1 year
0.39%
FMB expense ratio
0.05%
MUB expense ratio

What they hold in common

By the books each fund has filed, FMB and MUB hold 1% of their money in the same securities at the same weight. Above 50%, holding both is close to holding one of them twice. Holdings dated May 31, 2026 and Jul 31, 2026.

half

1% in common

Positions both hold, largest shared weight first
Holding FMB MUB
NY NYCGEN 08/01/2045, due Aug 1, 2045 0.08% 0.07%
TX SANUTL 5.25 02/01/2049, due Feb 1, 2049 0.06% 0.06%
IL ILS 5 11/01/2029, due Nov 1, 2029 0.22% 0.04%
TX TXSWTR 5 10/15/2049, due Oct 15, 2049 0.08% 0.04%
TX TXSTRN 5 08/15/2038, due Aug 15, 2038 0.07% 0.04%
NY NYCUTL 5.5 06/15/2039, due Jun 15, 2039 0.11% 0.03%
PA PASTRN 4 12/01/2045, due Dec 1, 2045 0.21% 0.03%
NJ NJSTRN 5 06/15/2045, due Jun 15, 2045 0.09% 0.02%
TX TXS 5 10/01/2043, due Oct 1, 2043 0.08% 0.02%
NY NYSHGR 5 03/15/2038, due Mar 15, 2038 0.40% 0.02%
NY NYC 5 10/01/2043, due Oct 1, 2043 0.09% 0.02%
IL ILSTRN 5 01/01/2038, due Jan 1, 2038 0.03% 0.02%
Only in FMB
KY MEADEV 08/01/2061, due Aug 1, 2061 0.79%
GA MAIUTL 09/01/2052, due Sep 1, 2052 0.71%
AL BBEUTL 10/01/2052, due Oct 1, 2052 0.50%
NY NYCGEN 4 11/01/2037, due Nov 1, 2037 0.48%
AL ESDPWR 11/01/2053, due Nov 1, 2053 0.44%
TX TMGUTL 01/01/2054, due Jan 1, 2054 0.44%
TN TNSUTL 5 11/01/2034, due Nov 1, 2034 0.44%
GA ATLAPT 4 07/01/2037, due Jul 1, 2037 0.43%
Only in MUB
Board of Regents of the University of Texas System, Series 2025B, due Aug 15, 2036 0.19%
New York State Thruway Authority, Series 2022A, due Mar 15, 2048 0.15%
San Antonio Water System, Series 2025D, due May 1, 2055 0.14%
Triborough Bridge & Tunnel Authority, Series 2005B-2, due Jan 1, 2032 0.14%
New York City Transitional Finance Authority Future Tax Secured, Series 2019C-4, due Nov 1, 2044 0.13%
New York State Dormitory Authority, Series 2019D, due Feb 15, 2047 0.13%
Ohio State University (The), Series 2026A, due Jun 1, 2035 0.13%
Houston Higher Education Finance Corp., Series 2024, due May 15, 2034 0.13%

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On the same fields

FMB
First Trust Managed Municipal ETF
MUB
iShares National Muni Bond ETF
Where it sits Bond ETF Bond ETF
What it is Actively managed Tracks an index of National Muni Bond
Total return, 1 year −2.1% −2.0%
S&P 500 over the same days +17.3% +17.3%
Gap to the S&P 500 −19.4 pts −19.3 pts
Expense ratio 0.39% 0.05%
Holdings 1249 7448
Net assets $1.9bn $48.9bn

FMB and MUB on the fields both publish, as of Oct 9, 2026. Source: ETFIQ.

FMB in plain words

FMB is actively managed and tracks no index. Over the year to Oct 9, 2026 it returned −2.1% with distributions reinvested. The prospectus expense ratio is 0.39% a year. It sat 5.8% below its high of Jul 6, 2026 on Oct 9, 2026.

MUB in plain words

MUB tracks an index of National Muni Bond. Over the year to Oct 9, 2026 it returned −2.0% with distributions reinvested. The prospectus expense ratio is 0.05% a year. It sat 5.3% below its high of Jul 6, 2026 on Oct 9, 2026.

Questions people ask

Which returned more over the last year, FMB or MUB?
In the year to Oct 9, 2026, with distributions reinvested, FMB returned −2.1% and MUB −2.0%.
Which is cheaper, FMB or MUB?
MUB is cheaper, by 0.34 percentage points a year. That is about $34 on $10,000 held for a year. Fees come from each fund's prospectus.
Cite this pageCitation, APA and Markdown

ETFIQ, FMB against MUB, data as of Oct 9, 2026. https://etfiq.com/compare/any/fmb-vs-mub

Open data

Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.