RFNBX vs. AFTFX
RFNBX (American Funds Fundamental Investors Fund Class R2) and AFTFX (American Funds Tax-Exempt Bond Fund of America Class F-1) are both mutual funds - RFNBX is a Large Cap Blend Equities fund actively managed by Capital Group, while AFTFX is a Municipal Bonds fund actively managed by Capital Group. Both are actively managed. Over the past 10 years, RFNBX returned 13.26%/yr vs 1.85%/yr for AFTFX. Their -0.08 correlation means they have often moved in opposite directions in the past. RFNBX charges 1.36%/yr vs 0.63%/yr for AFTFX.
Performance
RFNBX vs. AFTFX - Performance Comparison
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Returns By Period
In the year-to-date period, RFNBX achieves a 11.62% return, which is significantly higher than AFTFX's 0.25% return. Over the past 10 years, RFNBX has outperformed AFTFX with an annualized return of 13.26%, while AFTFX has yielded a comparatively lower 1.85% annualized return.
RFNBX
- 1D
- 2.11%
- 1M
- -1.04%
- 6M
- 7.56%
- YTD
- 11.62%
- 1Y
- 23.68%
- 3Y*
- 21.05%
- 5Y*
- 12.85%
- 10Y*
- 13.26%
- ALL TIME*
- 10.76%
AFTFX
- 1D
- -0.08%
- 1M
- -1.91%
- 6M
- -0.39%
- YTD
- 0.25%
- 1Y
- 4.61%
- 3Y*
- 3.29%
- 5Y*
- 0.47%
- 10Y*
- 1.85%
- ALL TIME*
- 3.49%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $0.00 | $0.00 | $0.00 | |
| $0.00 | $0.00 | $0.00 |
RFNBX vs. AFTFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
RFNBX American Funds Fundamental Investors Fund Class R2 | 11.62% | 23.22% | 21.80% | 24.89% | -17.32% | 21.49% | 12.51% | 26.09% | -8.89% | 21.82% |
AFTFX American Funds Tax-Exempt Bond Fund of America Class F-1 | 0.25% | 3.77% | 2.22% | 6.41% | -9.23% | 1.96% | 4.64% | 7.09% | 0.66% | 5.43% |
Correlation
The correlation between RFNBX and AFTFX is 0.22, which is low. Their historical price movements had little consistent relationship.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.22 |
Correlation (3Y) Balances recent behavior with more history. | 0.14 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.13 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.03 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2003 | -0.08 |
The correlation between RFNBX and AFTFX shifts across timeframes, from -0.08 (all time) to 0.22 (1 year), reflecting how their relationship changes across market environments.
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Return for Risk
RFNBX vs. AFTFX — Risk / Return Rank
RFNBX
AFTFX
RFNBX vs. AFTFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds Fundamental Investors Fund Class R2 (RFNBX) and American Funds Tax-Exempt Bond Fund of America Class F-1 (AFTFX). 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.
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.
| RFNBX | AFTFX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.48 | ||
| Sortino ratioReturn per unit of downside risk | -0.81 | ||
| Omega ratioGain probability vs. loss probability | 1.25 | 1.43 | -0.18 |
| Calmar ratioReturn relative to maximum drawdown | 1.98 | 1.80 | +0.17 |
| Martin ratioReturn relative to average drawdown | 8.47 | 5.91 | +2.56 |
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Drawdowns
RFNBX vs. AFTFX - Drawdown Comparison
The maximum RFNBX drawdown since its inception was -53.81%, which is greater than AFTFX's maximum drawdown of -13.99%. Use the drawdown chart below to compare losses from any high point for RFNBX and AFTFX.
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Drawdown Indicators
| RFNBX | AFTFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.81% | -13.99% | -39.82% |
Max Drawdown (1Y)Largest decline over 1 year | -10.78% | -2.76% | -8.02% |
Max Drawdown (3Y)Largest decline over 3 years | -18.11% | -5.07% | -13.04% |
Max Drawdown (5Y)Largest decline over 5 years | -25.53% | -13.93% | -11.60% |
Max Drawdown (10Y)Largest decline over 10 years | -33.96% | -13.99% | -19.97% |
Current DrawdownCurrent decline from peak | -2.74% | -1.91% | -0.83% |
Average DrawdownAverage peak-to-trough decline | -7.21% | -1.85% | -5.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.51% | 0.84% | +1.67% |
Volatility
RFNBX vs. AFTFX - Volatility Comparison
American Funds Fundamental Investors Fund Class R2 (RFNBX) has a higher volatility of 4.22% compared to American Funds Tax-Exempt Bond Fund of America Class F-1 (AFTFX) at 0.87%. This indicates that RFNBX's price experiences larger fluctuations and is considered to be riskier than AFTFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RFNBX | AFTFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.22% | 0.87% | +3.35% |
Volatility (6M)Calculated over the trailing 6-month period | 12.13% | 2.17% | +9.96% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.16% | 2.68% | +12.48% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.01% | 3.77% | +13.24% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.77% | 3.78% | +13.99% |
RFNBX vs. AFTFX - Expense Ratio Comparison
RFNBX has a 1.36% expense ratio, which is higher than AFTFX's 0.63% expense ratio.
Dividends
RFNBX vs. AFTFX - Dividend Comparison
RFNBX's dividend yield for the trailing twelve months is around 6.84%, more than AFTFX's 2.73% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AFTFX American Funds Tax-Exempt Bond Fund of America Class F-1 | 2.73% | 2.92% | 2.84% | 2.62% | 2.25% | 2.39% | 2.34% | 2.52% | 2.75% | 2.93% | 3.02% | 3.10% |
RFNBX American Funds Fundamental Investors Fund Class R2 | 6.84% | 7.90% | 8.19% | 5.13% | 4.16% | 10.27% | 0.83% | 6.20% | 8.38% | 6.54% | 3.99% | 5.32% |
Frequently Asked Questions
RFNBX and AFTFX have a correlation of 0.22, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RFNBX has higher volatility (4.22%) compared to AFTFX (0.87%). In terms of maximum drawdown, RFNBX dropped -53.81% vs AFTFX's -13.99%.
AFTFX currently has the higher Sharpe Ratio (1.88 vs 1.40), 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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