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.
| FMB | MUB | |
|---|---|---|
| Expense ratio | 0.39% | 0.05% |
| Net assets | $1.9bn | $48.9bn |
| Total return, 1 year | −2.1% | −2.0% |
| What it tracks | No index, actively managed | ICE AMT-Free US National Municipal Index |
| Holdings in common | 1% | |
| Below its high | 5.8%, high on Jul 6, 2026 | 5.3%, high on Jul 6, 2026 |
Holdings in common uses holdings dated May 31, 2026 and Jul 31, 2026.
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
On the same fields
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.
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
Overlap adds up the smaller of the two weights for each security both funds hold.
Cite this pageCitation, APA and Markdown
ETFIQ, FMB against MUB, data as of Oct 9, 2026. https://etfiq.com/compare/any/fmb-vs-mub
ETFIQ. (Oct 9, 2026). FMB against MUB. Retrieved from https://etfiq.com/compare/any/fmb-vs-mub
[FMB against MUB (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/any/fmb-vs-mub)
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