iShares National Muni Bond ETF

MUB
ETF Ticker

-1.98%

-1.19%

NYSE Arca Exchange

Fixed Income

United States

Municipal

ETF Strategy Fund Grade AAA

The iShares National Muni Bond ETF, MUB_US, is listed on the NYSE Arca Exchange and tracks the ICE AMT-Free US National Municipal index. The fund provides exposure to United States, Municipal Fixed Income and has assets under management of $45,400.0m (as of Aug 31, 2026). The ETF trades in USD and was listed on the exchange on Sep 7, 2007. It has a net expense ratio of 5bps. (All data in USD as of Oct 15, 2026 unless stated.)

The underlying ICE AMT-Free US National Municipal Index targets USD-denominated, investment-grade, tax-exempt municipal bonds publicly issued by U.S. states and their political subdivisions, excluding issues subject to AMT. Bonds must be rated ≥ BBB−/Baa3 (lowest of S&P/Moody’s/Fitch where available), have original deal size ≥ USD 100m and current par outstanding ≥ USD 15m, and at least one calendar month to final maturity. The universe spans general obligation, revenue, prerefunded/escrowed, insured, municipal leases, when-issued, and zero-coupon bonds; taxable munis and below-investment-grade are excluded. Constituents are market-value weighted with concentration capping to limit dominant obligors/sectors and enhance capacity. The index is rebalanced and reconstituted monthly on the last calendar day; additions/removals reflect updated ratings, maturities, and size tests.

ETF Details

Key Facts

Issuer:
iShares
AUM:
$45,400.0m (as of Aug 31, 2026)
Net Expense Ratio:
5 bps
Inception Date:
Sep 7, 2007
Index:
ICE AMT-Free US National Municipal Index
Dividend Frequency:
Monthly

Trading

Ticker:
MUB
Exchange:
NYSE Arca Exchange
ISIN:
US4642884146
Trading Currency:
USD
Domicile:
United States

Classification & Risk

Asset Class:
Fixed Income
Asset Region:
United States
Theme:
Municipal
Economic Development:
Developed Markets
1 Year Volatility:
3.61%
3 Year Volatility:
4.11%
5 Year Volatility:
4.22%

Performance

TTM Dividend Yield:
3.19% (verify with issuer)
1 Month Performance:
-0.10%
3 Month Performance:
-3.21%
6 Month Performance:
-2.55%
1 Year Performance:
-1.19%
3 Year Performance:
9.58%
5 Year Performance:
1.52%
Investment Proposition

iShares National Muni Bond ETF (MUB) delivers broad, investment-grade exposure to U.S. municipal bonds designed to provide federally tax-exempt income and diversified credit across states, sectors, and issuers. The strategy emphasizes high-quality general obligation and essential-service revenue bonds, seeking a balance between interest-rate sensitivity and credit stability. Return drivers include rate movements, yield-curve shifts, and idiosyncratic issuer fundamentals tied to demographic trends and state-local revenue health. MUB can help dampen equity volatility and enhance after-tax income in balanced portfolios; it fits as a core muni sleeve for high-tax households or as a defensive ballast for multi-asset allocations. The fund may fare relatively well when inflation moderates and policy paths stabilize, while abrupt rate repricing or widening credit spreads can pressure total returns. Likely users include wealth managers implementing tax-aware income ladders and institutional allocators seeking an investment-grade municipal anchor alongside taxable fixed income. A key fund-specific risk is interest-rate duration: sustained yield increases or curve steepening can weigh on price even as income accrues, requiring horizon-aligned expectations.

ETF Analytics

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