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MUB

iShares National Muni Bond ETF

Tracks the S&P National AMT-Free Municipal Bond Index, providing exposure to US municipal bonds exempt from federal income tax. Attractive for US taxpayers in high tax brackets. Not tax-advantaged for non-US investors.

Fixed IncomeTER 0.07%Dist.
TER
0.07%
AUM
$40B
CAGR
3.1%
Volatility
5.3%
Sharpe
0.02
Max Drawdown
-11.6%
Data Range
2007-10 → 2026-04

Performance Analysis

Maximum Drawdown History

How far the ETF has fallen from its all-time high at each point. Deeper = more painful.

Current DD-1.1%
Worst DD-11.6%
Worst date2022-10

Rolling Returns

Annualized returns over rolling windows. Shows the range of outcomes depending on when you invested.

Avg return3.0%
Best7.8%
Worst-2.2%
% positive87%
187 periods

Key Facts

ISIN
US4642886158
Issuer
BlackRock
Benchmark
S&P National AMT-Free Municipal Bond Index
Total Expense Ratio (TER)
0.07%
Assets Under Management
$40B approx.
Inception Date
2007-09-07
Domicile
United States
Legal Structure
Open-Ended Fund
Dividend Policy
Distributing (pays dividends)
Replication Method
Physical (Optimized Sampling)
UCITS Status
✗ Not UCITS
Fund Currency
USD
Primary Exchange
NYSE Arca
Number of Holdings
~5,000

Top 10 Holdings

Top 10 represent 7.8% of the fund.

1
CA-GOCalifornia GO 5.0% 2035
1.20%
2
NY-GONew York GO 4.5% 2033
1.00%
3
TX-GOTexas GO 4.0% 2032
0.90%
4
FL-GOFlorida GO 3.5% 2031
0.80%
5
NJ-TPKENJ Turnpike 5.0% 2040
0.80%
6
IL-GOIllinois GO 5.5% 2035
0.70%
7
MTA-NYMTA NY 5.0% 2038
0.70%
8
CA-REVCalifornia Revenue 4.5% 2042
0.60%
9
MA-GOMassachusetts GO 4.0% 2034
0.60%
10
PA-GOPennsylvania GO 4.25% 2033
0.50%
Backtest this ETFOfficial Fund Page

Who Is This ETF For?

Portfolio stabilizer and income generator. Reduces overall portfolio volatility when paired with equities.

Key Risks to Consider

Interest rate risk: bond prices fall when rates rise.

Non-UCITS: may have unfavorable tax treatment for non-US investors (US estate tax, withholding tax).

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Data & Methodology

Metadata sourced from official issuer documentation. Price data from Yahoo Finance (monthly adjusted close, includes reinvested dividends and splits). AUM figures are approximate and updated quarterly.

Data source: Yahoo Finance (adjusted close), BlackRock (metadata)Last verified: 2026-04-16

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💬 Frequently Asked Questions

Tracks the S&P National AMT-Free Municipal Bond Index, providing exposure to US municipal bonds exempt from federal income tax. Attractive for US taxpayers in high tax brackets. Not tax-advantaged for non-US investors.
MUB has a total expense ratio (TER) of 0.07%, which means you pay $7 per year for every $10,000 invested.
Yes, MUB is a distributing ETF that pays dividends to shareholders. The frequency depends on the fund's schedule.
MUB is a US-domiciled ETF (not UCITS). Non-US investors should consider the US estate tax implications (40% on US assets above $60,000) and the 30% dividend withholding tax (reduced by treaty in some countries).
MUB uses optimized sampling, holding a representative subset of the S&P National AMT-Free Municipal Bond Index index to minimize costs while closely tracking performance.