FLMI vs MUB

FLMIAFranklin Dynamic Municipal Bond ETF

MUBAiShares National Muni Bond ETF

In short

FLMI Franklin's muni fund skips the index-hugging route: a hands-on book of roughly 1,300 tax-exempt bonds, paying out monthly. Federal-tax-free income is the entire job description, and it has been at it since 2017.

MUB Municipal bonds, indexed and cheap. Since 2007, MUB has packaged investment-grade national munis into tax-exempt monthly income for five basis points a year, and it sits among the deepest pools in the muni-ETF aisle.

Stated mandate

FLMI The fund seeks high current income exempt from federal income taxes. It normally invests at least 80% of net assets in municipal securities whose interest is federally tax-exempt.

MUB The fund seeks to track an index of investment-grade U.S. municipal bonds, providing diversified exposure to the national municipal-bond market and tax-exempt income.

Why people hold it

• FLMI One mission, stated plainly: high current income exempt from federal income tax, with at least 80% of net assets in municipal securities. No side quests.
• Roughly 1,300 bonds spread the credit risk thin, so no single issuer's bad headline sets the tone for the portfolio.
• Income lands monthly, matching how most people actually spend it.
• Actively traded, and it sticks tightly to the mandate in its prospectus. One of the stronger implementations in a crowded muni field.

• MUB 0.05% a year against a muni-ETF median near 0.30%. In a category built on modest, tax-exempt yields, that fee gap is real money left in the fund.
• The benchmark is AMT-free: the ICE AMT-Free US National Municipal Index screens out munis whose interest can be pulled into the alternative minimum tax.ishares.com
• Tracks its index closely, one of the tighter jobs in its peer group, and distributes monthly. A multi-billion-dollar fund that trades actively.
• Broad investment-grade exposure across the national muni market, spread over thousands of issuers rather than one state's budget.ishares.com

Worth knowing

• FLMI At 0.30% a year, the fee sits at the muni ETF median but well above index giants like VTEB and SCMB at 0.03%. The premium buys a managed book, not an index.
• The tax break is federal. State and local treatment depends on where you live and what the fund holds.
• It's a bond fund, so share prices move with interest rates even while the tax-exempt coupons keep arriving.

• MUB Two rivals undercut it: VTEB and SCMB both run 0.03%. A two-basis-point gap is small, but it is a gap.
• A bond fund with no maturity date to hold to. Share prices move with interest rates and muni credit conditions, both directions.
• National by design, so no single-state tilt and no in-state tax angle. iShares runs state-specific muni funds such as NYF for that job.

Full FLMI profile⁠

Full MUB profile⁠