MBND vs MUB

MBNDDState Street Nuveen Municipal Bond ETF

MUBAiShares National Muni Bond ETF

In short

MBND A muni fund that picks rather than tracks: roughly 70 bonds chosen for value and yield, benchmarked to the intermediate 3-15 year part of the curve, with federally tax-exempt income paid monthly.

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

MBND The fund seeks broad exposure to municipal bonds providing income exempt from federal income taxes and uses an active approach focused on higher-yielding, undervalued bonds with above-average total-return potential.

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

• MBND Active where most of the category is passive: a value-oriented hunt for higher-yielding, undervalued bonds in a concentrated book of roughly 70 positions.
• Income is exempt from federal income taxes and pays on a monthly cadence.
• Measured against the Bloomberg 3-15 Year Blend (2-17) Municipal Bond Index, so it lives in the intermediate belly of the curve, not the long, rate-twitchy end.

• 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

• MBND 0.40% a year is above the typical muni ETF, and the category's index giants (VTEB, SCMB) run at 0.03%. Active picking has to earn that gap.
• Small asset base and thin trading volume: spreads can widen, so limit orders matter more here than in the category's mega-funds.
• A roughly 70-bond active book can diverge from its benchmark in either direction. You are buying a manager's calls, not the whole muni market.

• 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 MBND profile⁠

Full MUB profile⁠