- ISIN
- US09258N3567
- CUSIP
- 09258N356
- Issuer
- BlackRock
- Inception Date
- Dec 17, 2000
- Category
- Municipal Bonds
- Min. Investment
- $1,000
- Distribution Policy
- Distributing
- Asset Class
- Bond
Share Price Chart
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Performance
BIDAX Performance Chart
iShares Municipal Bond Index Fund (BIDAX) is up 1.2% since the beginning of the year. BIDAX is currently trading at $11 per share. Investors who bought $1,000 worth of BIDAX shares 5 years ago would now be looking at an investment worth $1,033.
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Returns By Period
iShares Municipal Bond Index Fund (BIDAX) has returned 1.22% so far this year and 6.78% over the past 12 months.
iShares Municipal Bond Index Fund
- 1D
- 0.00%
- 1M
- 0.44%
- YTD
- 1.22%
- 6M
- 1.58%
- 1Y
- 6.78%
- 3Y*
- 3.62%
- 5Y*
- 0.66%
- 10Y*
- —
Benchmark (S&P 500 Index)
- 1D
- 0.13%
- 1M
- 5.25%
- YTD
- 11.16%
- 6M
- 11.43%
- 1Y
- 28.20%
- 3Y*
- 21.12%
- 5Y*
- 12.66%
- 10Y*
- 13.75%
BIDAX Monthly Returns History
Based on dividend-adjusted daily data since Nov 16, 2018, BIDAX's average daily return is +0.01%, while the average monthly return is +0.20%. At this rate, an investment would double in approximately 28.9 years.
Historically, 59% of months were positive and 41% were negative. The best month was Nov 2023 with a return of +6.6%, while the worst month was Sep 2022 at -3.8%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 5 months.
On a daily basis, BIDAX closed higher 37% of trading days. The best single day was Mar 25, 2020 with a return of +3.8%, while the worst single day was Mar 19, 2020 at -2.8%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.71% | 1.35% | -2.25% | 1.00% | 0.44% | 0.00% | 1.22% | ||||||
| 2025 | 0.50% | 1.34% | -1.66% | -0.49% | -0.30% | 0.73% | -0.30% | 0.92% | 2.41% | 1.08% | 0.17% | 0.08% | 4.52% |
| 2024 | -0.32% | -0.04% | -0.14% | -1.13% | -0.33% | 1.52% | 0.77% | 0.68% | 1.13% | -1.46% | 1.94% | -1.13% | 1.44% |
| 2023 | 2.99% | -2.47% | 2.34% | -0.45% | -0.69% | 0.86% | 0.13% | -1.24% | -2.92% | -1.53% | 6.55% | 2.42% | 5.74% |
| 2022 | -2.78% | -0.48% | -2.88% | -2.88% | 1.56% | -2.15% | 2.42% | -2.47% | -3.76% | -0.92% | 5.06% | -0.16% | -9.41% |
| 2021 | 0.67% | -1.75% | 0.59% | 0.92% | 0.42% | 0.26% | 0.65% | -0.39% | -0.72% | -0.15% | 0.76% | 0.14% | 1.38% |
Benchmark Metrics
iShares Municipal Bond Index Fund has an annualized alpha of 1.97%, beta of 0.03, and R2 of 0.02 versus S&P 500 Index. Calculated based on daily prices since November 19, 2018.
- This fund participated in 22.43% of S&P 500 Index downside but only 14.63% of its upside - more exposed to losses than it benefited from rallies.
- Beta of 0.03 may look defensive, but with R2 of 0.02 this fund 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 fund's risk.
- R2 of 0.02 means this fund 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
- 1.97%
- Beta
- 0.03
- R²
- 0.02
- Upside Capture
- 14.63%
- Downside Capture
- 22.43%
Expense Ratio
BIDAX has an expense ratio of 0.50%, placing it in the medium range.
Return for Risk
Risk / Return Rank
BIDAX ranks 61 for risk / return — better than 61% of mutual funds 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 Municipal Bond Index Fund (BIDAX) and compare them to S&P 500 Index.
| BIDAX | Benchmark | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 2.43 | 2.39 | +0.04 |
Sortino ratioReturn per unit of downside risk | 3.80 | 3.25 | +0.54 |
Omega ratioGain probability vs. loss probability | 1.60 | 1.43 | +0.17 |
Calmar ratioReturn relative to maximum drawdown | 2.21 | 3.11 | -0.91 |
Martin ratioReturn relative to average drawdown | 7.46 | 14.38 | -6.93 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
Dividends
Dividend History
iShares Municipal Bond Index Fund provided a 3.11% dividend yield over the last twelve months, with an annual payout of $0.34 per share. The fund has been increasing its distributions for 3 consecutive years.
| Period | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 |
|---|---|---|---|---|---|---|---|---|---|
| Dividend | $0.34 | $0.45 | $0.36 | $0.24 | $0.21 | $0.29 | $0.29 | $0.44 | $0.06 |
Dividend yield | 3.11% | 4.09% | 3.25% | 2.16% | 1.92% | 2.36% | 2.35% | 3.64% | 0.48% |
Monthly Dividends
The table displays the monthly dividend distributions for iShares Municipal Bond Index Fund. 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 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.00 | $0.14 | ||||||
| 2025 | $0.05 | $0.06 | $0.06 | $0.06 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.45 |
| 2024 | $0.02 | $0.03 | $0.02 | $0.03 | $0.02 | $0.03 | $0.03 | $0.03 | $0.03 | $0.03 | $0.05 | $0.05 | $0.36 |
| 2023 | $0.02 | $0.03 | $0.02 | $0.00 | $0.02 | $0.02 | $0.02 | $0.02 | $0.02 | $0.00 | $0.03 | $0.03 | $0.24 |
| 2022 | $0.02 | $0.02 | $0.02 | $0.02 | $0.02 | $0.00 | $0.00 | $0.02 | $0.00 | $0.02 | $0.02 | $0.02 | $0.21 |
| 2021 | $0.02 | $0.02 | $0.02 | $0.02 | $0.02 | $0.02 | $0.03 | $0.02 | $0.02 | $0.02 | $0.02 | $0.04 | $0.29 |
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 Municipal Bond Index Fund. 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 Municipal Bond Index Fund was 14.39%, occurring on Oct 25, 2022. Recovery took 725 trading sessions.
The current iShares Municipal Bond Index Fund drawdown is 0.83%.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
Bear market2022 | -14.39%Oct 2022 | 1y 2mo | 2y 10mo | 4y 1moAug 2021 - Sep 2025 |
COVID crash2020 | -11.43%Mar 2020 | 10d | 4mo 19d | 4mo 29dMar 2020 - Aug 2020 |
2026 pullback2026 | -2.95%Mar 2026 | 25d | — | 3mo 3dMar 2026 - now |
2021 pullback2021 | -2.18%Feb 2021 | 9d | 3mo 8d | 3mo 17dFeb 2021 - Jun 2021 |
2019 pullback2019 | -1.72%Sep 2019 | 12d | 3mo 17d | 3mo 29dSep 2019 - Jan 2020 |
Drawdown Indicators
| BIDAX | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -14.39% | -56.78% | +42.39% |
Max Drawdown (1Y)Largest decline over 1 year | -2.95% | -9.10% | +6.15% |
Max Drawdown (3Y)Largest decline over 3 years | -6.07% | -18.90% | +12.83% |
Max Drawdown (5Y)Largest decline over 5 years | -14.39% | -25.43% | +11.04% |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.92% | — |
Current DrawdownCurrent decline from peak | -0.83% | 0.00% | -0.83% |
Average DrawdownAverage peak-to-trough decline | -3.52% | -10.72% | +7.20% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.87% | 1.97% | -1.10% |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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