- ISIN
- US4642881589
- CUSIP
- 464288158
- Issuer
- iShares
- Inception Date
- Nov 5, 2008
- Region
- North America (U.S.)
- Category
- Municipal Bonds
- Leveraged
- 1x (No leverage)
- Index Tracked
- ICE Short Maturity AMT-Free US National Municipal Index - Benchmark TR Gross
- Distribution Policy
- Distributing
- Asset Class
- Bond
- Assets Under Management
- $11B
Share Price Chart
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Performance
SUB Performance Chart
iShares Short-Term National Muni Bond ETF (SUB) is up 0.9% since the beginning of the year. SUB is currently trading at $107 per share. Investors who bought $1,000 worth of SUB shares 5 years ago would now be looking at an investment worth $1,078.
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Returns By Period
iShares Short-Term National Muni Bond ETF (SUB) has returned 0.93% so far this year and 2.93% over the past 12 months. Over the last ten years, SUB has returned 1.46% per year, falling short of the S&P 500 Index benchmark, which averaged 13.88% annually.
iShares Short-Term National Muni Bond ETF
- 1D
- 0.00%
- 1M
- 0.52%
- YTD
- 0.93%
- 6M
- 1.10%
- 1Y
- 2.93%
- 3Y*
- 3.08%
- 5Y*
- 1.51%
- 10Y*
- 1.46%
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%
SUB Monthly Returns History
Based on dividend-adjusted daily data since Nov 7, 2008, SUB's average daily return is +0.01%, while the average monthly return is +0.13%. At this rate, an investment would double in approximately 44.5 years.
Historically, 65% of months were positive and 35% were negative. The best month was Jan 2009 with a return of +2.0%, while the worst month was Sep 2022 at -1.3%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 5 months.
On a daily basis, SUB closed higher 52% of trading days. The best single day was Jan 13, 2009 with a return of +5.5%, while the worst single day was Jan 14, 2009 at -4.9%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.57% | 0.32% | -0.66% | 0.28% | 0.14% | 0.27% | 0.93% | ||||||
| 2025 | 0.45% | 0.34% | -0.29% | 0.16% | 0.56% | 0.56% | 0.57% | 0.46% | 0.00% | -0.01% | 0.35% | 0.43% | 3.64% |
| 2024 | -0.20% | 0.03% | -0.16% | -0.02% | -0.19% | 0.56% | 0.87% | 0.70% | 0.52% | -0.45% | 0.47% | 0.06% | 2.17% |
| 2023 | 0.67% | -1.24% | 1.27% | -0.20% | -0.53% | 0.52% | 0.07% | -0.03% | -0.74% | 0.38% | 1.92% | 0.82% | 2.91% |
| 2022 | -1.25% | -0.19% | -1.08% | -0.81% | 1.00% | 0.06% | 0.75% | -1.12% | -1.33% | 0.02% | 1.85% | 0.10% | -2.05% |
| 2021 | 0.05% | -0.38% | 0.22% | 0.16% | -0.04% | 0.09% | 0.23% | -0.05% | -0.25% | -0.12% | 0.04% | 0.07% | 0.03% |
Benchmark Metrics
iShares Short-Term National Muni Bond ETF has an annualized alpha of 1.36%, beta of 0.02, and R2 of 0.01 versus S&P 500 Index. Calculated based on daily prices since November 07, 2008.
- This ETF participates in less of S&P 500 Index's moves in both directions, but captures a larger share of gains (4.87%) than losses (0.05%) - typical of diversified or defensive assets.
- Beta of 0.02 may look defensive, but with R2 of 0.01 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 0.01 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
- 1.36%
- Beta
- 0.02
- R²
- 0.01
- Upside Capture
- 4.87%
- Downside Capture
- 0.05%
Expense Ratio
SUB has an expense ratio of 0.07%, which is considered low.
Return for Risk
Risk / Return Rank
SUB ranks 82 for risk / return — in the top 82% of ETFs on our site. This means strong returns relative to risk — exactly what professional investors look for. Well-suited for investors who want to maximize return per unit of risk.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for iShares Short-Term National Muni Bond ETF (SUB) 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.
| SUB | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.89 | ||
| Sortino ratioReturn per unit of downside risk | +1.46 | ||
| Omega ratioGain probability vs. loss probability | 1.64 | 1.37 | +0.27 |
| Calmar ratioReturn relative to maximum drawdown | 3.65 | 2.78 | +0.87 |
| Martin ratioReturn relative to average drawdown | 10.32 | 12.44 | -2.12 |
Dividends
Dividend History
iShares Short-Term National Muni Bond ETF provided a 2.52% dividend yield over the last twelve months, with an annual payout of $2.69 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 | $2.69 | $2.58 | $2.21 | $1.83 | $0.90 | $0.77 | $1.33 | $1.69 | $1.39 | $0.99 | $0.79 | $0.81 |
Dividend yield | 2.52% | 2.42% | 2.10% | 1.73% | 0.86% | 0.72% | 1.23% | 1.58% | 1.32% | 0.95% | 0.75% | 0.77% |
Monthly Dividends
The table displays the monthly dividend distributions for iShares Short-Term National 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 | $0.21 | $0.24 | $0.22 | $0.23 | $0.22 | $1.13 | ||||||
| 2025 | $0.00 | $0.19 | $0.21 | $0.21 | $0.20 | $0.21 | $0.22 | $0.22 | $0.22 | $0.23 | $0.22 | $0.45 | $2.58 |
| 2024 | $0.00 | $0.17 | $0.18 | $0.17 | $0.18 | $0.19 | $0.18 | $0.18 | $0.19 | $0.20 | $0.19 | $0.39 | $2.21 |
| 2023 | $0.00 | $0.14 | $0.16 | $0.13 | $0.14 | $0.14 | $0.15 | $0.15 | $0.16 | $0.17 | $0.16 | $0.33 | $1.83 |
| 2022 | $0.00 | $0.04 | $0.04 | $0.05 | $0.07 | $0.06 | $0.07 | $0.07 | $0.08 | $0.10 | $0.10 | $0.21 | $0.90 |
| 2021 | $0.00 | $0.08 | $0.09 | $0.08 | $0.08 | $0.07 | $0.07 | $0.06 | $0.05 | $0.05 | $0.05 | $0.09 | $0.77 |
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 Short-Term National 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 Short-Term National Muni Bond ETF was 9.46%, occurring on Mar 19, 2020. Recovery took 42 trading sessions.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
COVID crash2020 | -9.46%Mar 2020 | 10d | 2mo 1d | 2mo 11dMar 2020 - May 2020 |
Financial crisis2007–2009 | -6.40%Feb 2009 | 1mo 7d | 2y 6mo | 2y 7moJan 2009 - Sep 2011 |
Financial crisis2007–2009 | -4.92%Jan 2009 | 0s | 2d | 2dJan 2009 - Jan 2009 |
Bear market2022 | -4.35%Sep 2022 | 1y 2mo | 1y 2mo | 2y 4moJul 2021 - Dec 2023 |
2013 pullback2013 | -2.43%Jun 2013 | 3mo 22d | 4mo 2d | 7mo 24dMar 2013 - Oct 2013 |
Drawdown Indicators
| SUB | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -9.46% | -56.78% | +47.32% |
Max Drawdown (1Y)Largest decline over 1 year | -0.81% | -9.10% | +8.29% |
Max Drawdown (3Y)Largest decline over 3 years | -1.23% | -18.90% | +17.67% |
Max Drawdown (5Y)Largest decline over 5 years | -4.35% | -25.43% | +21.08% |
Max Drawdown (10Y)Largest decline over 10 years | -9.46% | -33.92% | +24.46% |
Current DrawdownCurrent decline from peak | 0.00% | -1.80% | +1.80% |
Average DrawdownAverage peak-to-trough decline | -0.91% | -10.71% | +9.80% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.28% | 2.03% | -1.75% |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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