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ISIN
US4642881589
CUSIP
464288158
Issuer
iShares
Inception Date
Nov 5, 2008
Region
North America (U.S.)
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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S&P 500 Index

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%
*Multi-year figures are annualized to reflect compound growth (CAGR)

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%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20260.57%0.32%-0.66%0.28%0.14%0.27%0.93%
20250.45%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%
20230.67%-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%
20210.05%-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
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.


SUB Risk / Return Rank: 8282
Overall Rank
SUB Sharpe Ratio Rank: 9090
Sharpe Ratio Rank
SUB Sortino Ratio Rank: 9292
Sortino Ratio Rank
SUB Omega Ratio Rank: 9494
Omega Ratio Rank
SUB Calmar Ratio Rank: 7474
Calmar Ratio Rank
SUB Martin Ratio Rank: 6060
Martin Ratio Rank
The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

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.


SUBBenchmarkDifference
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.


1.00%1.50%2.00%2.50%$0.00$0.50$1.00$1.50$2.00$2.5020152016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM20252024202320222021202020192018201720162015
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.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
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
10d2mo 1d
2mo 11dMar 2020 - May 2020
Financial crisis2007–2009
-6.40%Feb 2009
1mo 7d2y 6mo
2y 7moJan 2009 - Sep 2011
Financial crisis2007–2009
-4.92%Jan 2009
0s2d
2dJan 2009 - Jan 2009
Bear market2022
-4.35%Sep 2022
1y 2mo1y 2mo
2y 4moJul 2021 - Dec 2023
2013 pullback2013
-2.43%Jun 2013
3mo 22d4mo 2d
7mo 24dMar 2013 - Oct 2013

Drawdown Indicators


SUBBenchmarkDifference

Max Drawdown

Largest 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 Drawdown

Current decline from peak

0.00%

-1.80%

+1.80%

Average Drawdown

Average peak-to-trough decline

-0.91%

-10.71%

+9.80%

Ulcer Index

Depth 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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Portfolio Analyzer

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