- ISIN
- US4642884146
- CUSIP
- 464288414
- Issuer
- iShares
- Inception Date
- Sep 7, 2007
- Region
- North America (U.S.)
- Category
- Municipal Bonds
- Leveraged
- 1x (No leverage)
- Index Tracked
- S&P National AMT-Free Municipal Bond Index
- Domicile
- United States
- Distribution Policy
- Distributing
- Asset Class
- Bond
- Assets Under Management
- $45B
Share Price Chart
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Performance
MUB Performance Chart
iShares National AMT-Free Muni Bond ETF (MUB) is up 1.5% since the beginning of the year. MUB is currently trading at $107 per share. Investors who bought $1,000 worth of MUB shares 5 years ago would now be looking at an investment worth $1,049.
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Returns By Period
iShares National AMT-Free Muni Bond ETF (MUB) has returned 1.53% so far this year and 6.58% over the past 12 months. Over the last ten years, MUB has returned 1.90% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.
iShares National AMT-Free Muni Bond ETF
- 1D
- -0.01%
- 1M
- 1.35%
- YTD
- 1.53%
- 6M
- 1.89%
- 1Y
- 6.58%
- 3Y*
- 3.21%
- 5Y*
- 0.96%
- 10Y*
- 1.90%
Benchmark (S&P 500 Index)
- 1D
- -0.37%
- 1M
- -0.01%
- YTD
- 9.16%
- 6M
- 8.64%
- 1Y
- 25.22%
- 3Y*
- 19.78%
- 5Y*
- 11.99%
- 10Y*
- 13.88%
MUB Monthly Returns History
Based on dividend-adjusted daily data since Sep 10, 2007, MUB's average daily return is +0.01%, while the average monthly return is +0.27%. At this rate, an investment would double in approximately 21.4 years.
Historically, 62% of months were positive and 38% were negative. The best month was Nov 2023 with a return of +5.7%, while the worst month was Feb 2008 at -4.6%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 5 months.
On a daily basis, MUB closed higher 54% of trading days. The best single day was Mar 25, 2020 with a return of +4.4%, while the worst single day was Mar 18, 2020 at -6.2%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.69% | 1.25% | -2.28% | 1.19% | 0.31% | 0.40% | 1.53% | ||||||
| 2025 | -0.01% | 1.33% | -1.82% | -0.41% | -0.57% | 0.87% | -0.32% | 0.84% | 2.22% | 1.20% | 0.21% | 0.24% | 3.78% |
| 2024 | 0.05% | -0.21% | -0.09% | -0.94% | -0.31% | 1.03% | 1.31% | 0.24% | 1.14% | -1.22% | 1.67% | -1.34% | 1.26% |
| 2023 | 2.46% | -2.27% | 2.41% | -0.21% | -0.64% | 0.56% | 0.03% | -0.78% | -2.55% | -1.25% | 5.71% | 2.26% | 5.56% |
| 2022 | -2.41% | -0.53% | -2.58% | -2.52% | 1.46% | -1.46% | 2.26% | -2.44% | -2.81% | -0.85% | 4.84% | -0.26% | -7.34% |
| 2021 | 0.34% | -1.56% | 0.57% | 0.76% | 0.35% | 0.35% | 0.46% | -0.19% | -0.70% | -0.05% | 0.73% | -0.01% | 1.02% |
Benchmark Metrics
iShares National AMT-Free Muni Bond ETF has an annualized alpha of 2.96%, beta of 0.04, and R2 of 0.02 versus S&P 500 Index. Calculated based on daily prices since September 10, 2007.
- This ETF participates in less of S&P 500 Index's moves in both directions, but captures a larger share of gains (13.43%) than losses (7.27%) - typical of diversified or defensive assets.
- Beta of 0.04 may look defensive, but with R2 of 0.02 this ETF is largely uncorrelated with S&P 500 Index - low beta reflects independence, not downside protection. See the Volatility section for a true picture of this ETF's risk.
- R2 of 0.02 means this ETF moves largely independently of S&P 500 Index - capture ratios reflect limited market correlation rather than active downside protection. Consider using a more representative benchmark.
- Alpha
- 2.96%
- Beta
- 0.04
- R²
- 0.02
- Upside Capture
- 13.43%
- Downside Capture
- 7.27%
Expense Ratio
MUB has an expense ratio of 0.07%, which is considered low.
Return for Risk
Risk / Return Rank
MUB ranks 67 for risk / return — better than 67% of ETFs on our site. You're getting solid returns for the risk taken. A good sign, especially for investors who want growth without excessive volatility.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for iShares National AMT-Free Muni Bond ETF (MUB) and compare them to S&P 500 Index.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| MUB | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.26 | ||
| Sortino ratioReturn per unit of downside risk | +0.58 | ||
| Omega ratioGain probability vs. loss probability | 1.48 | 1.37 | +0.11 |
| Calmar ratioReturn relative to maximum drawdown | 2.37 | 2.78 | -0.41 |
| Martin ratioReturn relative to average drawdown | 8.25 | 12.44 | -4.19 |
Dividends
Dividend History
iShares National AMT-Free Muni Bond ETF provided a 3.17% dividend yield over the last twelve months, with an annual payout of $3.40 per share. The fund has been increasing its distributions for 4 consecutive years.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dividend | $3.40 | $3.36 | $3.21 | $2.87 | $2.23 | $2.10 | $2.47 | $2.76 | $2.68 | $2.50 | $2.39 | $2.77 |
Dividend yield | 3.17% | 3.14% | 3.01% | 2.65% | 2.11% | 1.81% | 2.11% | 2.42% | 2.46% | 2.26% | 2.21% | 2.51% |
Monthly Dividends
The table displays the monthly dividend distributions for iShares National AMT-Free Muni Bond ETF. The dividends shown in the table have been adjusted to account for any splits that may have occurred.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | $0.00 | $0.28 | $0.29 | $0.28 | $0.29 | $0.28 | $1.42 | ||||||
| 2025 | $0.00 | $0.27 | $0.28 | $0.28 | $0.28 | $0.28 | $0.28 | $0.28 | $0.28 | $0.29 | $0.28 | $0.57 | $3.36 |
| 2024 | $0.00 | $0.26 | $0.27 | $0.26 | $0.26 | $0.28 | $0.26 | $0.26 | $0.27 | $0.28 | $0.27 | $0.54 | $3.21 |
| 2023 | $0.00 | $0.22 | $0.24 | $0.23 | $0.23 | $0.23 | $0.24 | $0.24 | $0.23 | $0.24 | $0.25 | $0.51 | $2.87 |
| 2022 | $0.00 | $0.16 | $0.17 | $0.17 | $0.17 | $0.16 | $0.19 | $0.19 | $0.20 | $0.20 | $0.20 | $0.42 | $2.23 |
| 2021 | $0.00 | $0.18 | $0.20 | $0.18 | $0.18 | $0.18 | $0.18 | $0.17 | $0.17 | $0.17 | $0.16 | $0.33 | $2.10 |
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
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Worst Drawdowns
The table below displays the maximum drawdowns of the iShares National AMT-Free Muni Bond ETF. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the iShares National AMT-Free Muni Bond ETF was 13.68%, occurring on Mar 19, 2020. Recovery took 92 trading sessions.
The current iShares National AMT-Free Muni Bond ETF drawdown is 0.41%.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
COVID crash2020 | -13.68%Mar 2020 | 9d | 4mo 13d | 4mo 22dMar 2020 - Jul 2020 |
Financial crisis2007–2009 | -12.33%Oct 2008 | 1mo 5d | 2mo 25d | 4moSep 2008 - Jan 2009 |
Bear market2022 | -11.88%Oct 2022 | 1y 3mo | 2y 1mo | 3y 4moJul 2021 - Dec 2024 |
2013 pullback2013 | -9.74%Jun 2013 | 6mo 23d | 1y 27d | 1y 7moDec 2012 - Jul 2014 |
2011 pullback2011 | -8.86%Jan 2011 | 4mo 21d | 6mo | 10mo 21dAug 2010 - Jul 2011 |
Drawdown Indicators
| MUB | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -13.68% | -56.78% | +43.10% |
Max Drawdown (1Y)Largest decline over 1 year | -2.79% | -9.10% | +6.31% |
Max Drawdown (3Y)Largest decline over 3 years | -5.34% | -18.90% | +13.56% |
Max Drawdown (5Y)Largest decline over 5 years | -11.88% | -25.43% | +13.55% |
Max Drawdown (10Y)Largest decline over 10 years | -13.68% | -33.92% | +20.24% |
Current DrawdownCurrent decline from peak | -0.41% | -1.80% | +1.39% |
Average DrawdownAverage peak-to-trough decline | -2.23% | -10.71% | +8.48% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.80% | 2.03% | -1.23% |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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