CGMU vs. MUB
CGMU (Capital Group Municipal Income ETF) and MUB (iShares National AMT-Free Muni Bond ETF) are both Municipal Bonds funds. CGMU is actively managed, while MUB is passively managed. Over the past 3 years, CGMU returned 4.70%/yr vs 3.43%/yr for MUB. Their correlation of 0.84 suggests significant overlap in exposure. CGMU charges 0.27%/yr vs 0.07%/yr for MUB.
Performance
CGMU vs. MUB - Performance Comparison
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Returns By Period
In the year-to-date period, CGMU achieves a 1.39% return, which is significantly higher than MUB's 1.24% return.
CGMU
- 1D
- -0.11%
- 1M
- 0.45%
- YTD
- 1.39%
- 6M
- 1.79%
- 1Y
- 6.72%
- 3Y*
- 4.70%
- 5Y*
- —
- 10Y*
- —
MUB
- 1D
- -0.08%
- 1M
- 0.56%
- YTD
- 1.24%
- 6M
- 1.74%
- 1Y
- 6.95%
- 3Y*
- 3.43%
- 5Y*
- 0.86%
- 10Y*
- 2.00%
CGMU vs. MUB - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | |
|---|---|---|---|---|---|
CGMU Capital Group Municipal Income ETF | 1.39% | 5.19% | 2.64% | 6.76% | 4.53% |
MUB iShares National AMT-Free Muni Bond ETF | 1.24% | 3.78% | 1.26% | 5.56% | 4.36% |
Correlation
The correlation between CGMU and MUB is 0.73, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.73 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.83 |
Correlation (All Time) Calculated using the full available price history since Oct 28, 2022 | 0.84 |
The correlation between CGMU and MUB shifts across timeframes, from 0.73 (1 year) to 0.84 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
CGMU vs. MUB — Risk / Return Rank
CGMU
MUB
CGMU vs. MUB - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Capital Group Municipal Income ETF (CGMU) and iShares National AMT-Free Muni Bond ETF (MUB). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
| CGMU | MUB | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.55 | ||
| Sortino ratioReturn per unit of downside risk | +0.69 | ||
| Omega ratioGain probability vs. loss probability | 1.64 | 1.50 | +0.13 |
| Calmar ratioReturn relative to maximum drawdown | 2.65 | 2.50 | +0.14 |
| Martin ratioReturn relative to average drawdown | 8.61 | 8.85 | -0.23 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| CGMU | MUB | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 2.94 | 2.39 | +0.55 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | — | 0.21 | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | — | 0.41 | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 1.66 | 0.58 | +1.07 |
Drawdowns
CGMU vs. MUB - Drawdown Comparison
The maximum CGMU drawdown since its inception was -4.11%, smaller than the maximum MUB drawdown of -13.68%. Use the drawdown chart below to compare losses from any high point for CGMU and MUB.
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Drawdown Indicators
| CGMU | MUB | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -4.11% | -13.68% | +9.57% |
Max Drawdown (1Y)Largest decline over 1 year | -2.55% | -2.79% | +0.24% |
Max Drawdown (3Y)Largest decline over 3 years | -3.89% | -5.34% | +1.45% |
Max Drawdown (5Y)Largest decline over 5 years | — | -11.88% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -13.68% | — |
Current DrawdownCurrent decline from peak | -0.89% | -0.70% | -0.19% |
Average DrawdownAverage peak-to-trough decline | -0.84% | -2.23% | +1.39% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.78% | 0.79% | -0.01% |
Volatility
CGMU vs. MUB - Volatility Comparison
The current volatility for Capital Group Municipal Income ETF (CGMU) is 0.79%, while iShares National AMT-Free Muni Bond ETF (MUB) has a volatility of 0.97%. This indicates that CGMU experiences smaller price fluctuations and is considered to be less risky than MUB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| CGMU | MUB | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 0.79% | 0.97% | -0.18% |
Volatility (6M)Calculated over the trailing 6-month period | 1.72% | 2.22% | -0.50% |
Volatility (1Y)Calculated over the trailing 1-year period | 2.29% | 2.92% | -0.63% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 3.48% | 4.06% | -0.58% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 3.48% | 4.92% | -1.44% |
CGMU vs. MUB - Expense Ratio Comparison
CGMU has a 0.27% expense ratio, which is higher than MUB's 0.07% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
CGMU vs. MUB - Dividend Comparison
CGMU's dividend yield for the trailing twelve months is around 3.33%, more than MUB's 3.17% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CGMU Capital Group Municipal Income ETF | 3.33% | 3.32% | 3.21% | 3.08% | 0.49% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
MUB iShares National AMT-Free Muni Bond ETF | 3.17% | 3.14% | 3.01% | 2.65% | 2.11% | 1.81% | 2.11% | 2.42% | 2.46% | 2.26% | 2.21% | 2.51% |
Frequently Asked Questions
CGMU and MUB have a correlation of 0.73, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
MUB has higher volatility (0.97%) compared to CGMU (0.79%). In terms of maximum drawdown, CGMU dropped -4.11% vs MUB's -13.68%.
On 3-year performance, CGMU leads with 4.70% vs 3.43% for MUB. On fees, MUB is cheaper at 0.07% per year. On volatility, CGMU has been the lower-risk option at 0.79%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 3-year period, CGMU has performed better with a 4.70% return vs 3.43%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
MUB is cheaper with a 0.07% expense ratio, compared with 0.27% for CGMU.
CGMU has the higher dividend yield at 3.33%, compared with 3.17% for MUB.
They also come from different issuers: Capital Group and iShares. Their fees differ too: 0.27% for CGMU and 0.07% for MUB.
CGMU currently has the higher Sharpe Ratio (2.94 vs 2.39), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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