AHMFX vs. RFNBX
Compare and contrast key facts about American High-Income Municipal Bond Fund Class F-2 (AHMFX) and American Funds Fundamental Investors Fund Class R2 (RFNBX).
AHMFX is an actively managed fund by Capital Group. It was launched on Aug 1, 2008. RFNBX is an actively managed fund by Capital Group. It was launched on May 21, 2002.
Performance
AHMFX vs. RFNBX - Performance Comparison
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AHMFX vs. RFNBX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AHMFX American High-Income Municipal Bond Fund Class F-2 | -0.15% | 6.03% | 6.45% | 7.04% | -12.44% | 5.49% | 4.61% | 9.12% | 1.80% | 9.09% |
RFNBX American Funds Fundamental Investors Fund Class R2 | -3.54% | 23.22% | 21.80% | 24.89% | -17.32% | 21.49% | 12.51% | 26.09% | -8.89% | 21.82% |
Returns By Period
In the year-to-date period, AHMFX achieves a -0.15% return, which is significantly higher than RFNBX's -3.54% return. Over the past 10 years, AHMFX has underperformed RFNBX with an annualized return of 3.42%, while RFNBX has yielded a comparatively higher 12.21% annualized return.
AHMFX
- 1D
- 0.33%
- 1M
- -2.06%
- YTD
- -0.15%
- 6M
- 1.48%
- 1Y
- 4.18%
- 3Y*
- 5.55%
- 5Y*
- 1.86%
- 10Y*
- 3.42%
RFNBX
- 1D
- 2.94%
- 1M
- -7.11%
- YTD
- -3.54%
- 6M
- -0.28%
- 1Y
- 22.29%
- 3Y*
- 19.58%
- 5Y*
- 11.03%
- 10Y*
- 12.21%
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AHMFX vs. RFNBX - Expense Ratio Comparison
AHMFX has a 0.42% expense ratio, which is lower than RFNBX's 1.36% expense ratio.
Return for Risk
AHMFX vs. RFNBX — Risk / Return Rank
AHMFX
RFNBX
AHMFX vs. RFNBX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American High-Income Municipal Bond Fund Class F-2 (AHMFX) and American Funds Fundamental Investors Fund Class R2 (RFNBX). 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.
| AHMFX | RFNBX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.71 | 1.28 | -0.56 |
Sortino ratioReturn per unit of downside risk | 0.97 | 1.92 | -0.95 |
Omega ratioGain probability vs. loss probability | 1.21 | 1.27 | -0.06 |
Calmar ratioReturn relative to maximum drawdown | 0.99 | 2.04 | -1.05 |
Martin ratioReturn relative to average drawdown | 3.25 | 8.87 | -5.62 |
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
| AHMFX | RFNBX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.71 | 1.28 | -0.56 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.39 | 0.66 | -0.27 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.76 | 0.69 | +0.07 |
Sharpe Ratio (All Time)Calculated using the full available price history | 1.52 | 0.56 | +0.96 |
Correlation
The correlation between AHMFX and RFNBX is -0.08. This indicates that the assets' prices tend to move in opposite directions. Negative correlation can be particularly beneficial for diversification and risk management, as one asset may offset the losses of the other during market fluctuations.
Dividends
AHMFX vs. RFNBX - Dividend Comparison
AHMFX's dividend yield for the trailing twelve months is around 4.25%, less than RFNBX's 8.18% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AHMFX American High-Income Municipal Bond Fund Class F-2 | 4.25% | 5.58% | 4.04% | 2.97% | 2.71% | 3.44% | 3.60% | 3.68% | 3.88% | 4.19% | 3.74% | 4.19% |
RFNBX American Funds Fundamental Investors Fund Class R2 | 8.18% | 7.90% | 8.19% | 5.13% | 4.16% | 10.27% | 0.83% | 6.20% | 8.38% | 6.54% | 3.99% | 5.32% |
Drawdowns
AHMFX vs. RFNBX - Drawdown Comparison
The maximum AHMFX drawdown since its inception was -17.65%, smaller than the maximum RFNBX drawdown of -53.81%. Use the drawdown chart below to compare losses from any high point for AHMFX and RFNBX.
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Drawdown Indicators
| AHMFX | RFNBX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.65% | -53.81% | +36.16% |
Max Drawdown (1Y)Largest decline over 1 year | -5.60% | -11.37% | +5.77% |
Max Drawdown (5Y)Largest decline over 5 years | -17.65% | -25.53% | +7.88% |
Max Drawdown (10Y)Largest decline over 10 years | -17.65% | -33.96% | +16.31% |
Current DrawdownCurrent decline from peak | -2.38% | -8.15% | +5.77% |
Average DrawdownAverage peak-to-trough decline | -2.38% | -7.29% | +4.91% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.70% | 2.61% | -0.91% |
Volatility
AHMFX vs. RFNBX - Volatility Comparison
The current volatility for American High-Income Municipal Bond Fund Class F-2 (AHMFX) is 1.15%, while American Funds Fundamental Investors Fund Class R2 (RFNBX) has a volatility of 6.02%. This indicates that AHMFX experiences smaller price fluctuations and is considered to be less risky than RFNBX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| AHMFX | RFNBX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.15% | 6.02% | -4.87% |
Volatility (6M)Calculated over the trailing 6-month period | 1.88% | 11.03% | -9.15% |
Volatility (1Y)Calculated over the trailing 1-year period | 6.45% | 18.15% | -11.70% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 4.82% | 16.73% | -11.91% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.53% | 17.68% | -13.15% |