RFNBX vs. CGFAX
RFNBX (American Funds Fundamental Investors Fund Class R2) and CGFAX (American Funds The Growth Fund of America Class 529-A) are both mutual funds - RFNBX is a Large Cap Blend Equities fund actively managed by Capital Group, while CGFAX is a Large Cap Growth Equities fund actively managed by Capital Group. Both are actively managed. Over the past 10 years, RFNBX returned 13.26%/yr vs 15.19%/yr for CGFAX. Their 0.96 correlation means they have historically moved very closely together. RFNBX charges 1.36%/yr vs 0.62%/yr for CGFAX.
Performance
RFNBX vs. CGFAX - 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 CGFAX's 5.59% return. Over the past 10 years, RFNBX has underperformed CGFAX with an annualized return of 13.26%, while CGFAX has yielded a comparatively higher 15.19% 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%
CGFAX
- 1D
- 1.17%
- 1M
- -2.12%
- 6M
- 4.96%
- YTD
- 5.59%
- 1Y
- 14.18%
- 3Y*
- 20.24%
- 5Y*
- 10.33%
- 10Y*
- 15.19%
- ALL TIME*
- 10.63%
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. CGFAX - 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% |
CGFAX American Funds The Growth Fund of America Class 529-A | 5.59% | 19.69% | 27.99% | 37.14% | -30.76% | 19.26% | 37.81% | 28.09% | -3.25% | 26.06% |
Correlation
The correlation between RFNBX and CGFAX is 0.95 - they have historically moved very closely together. At this level, their price movements offset little of one another.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.95 |
Correlation (3Y) Balances recent behavior with more history. | 0.95 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.95 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.95 |
Correlation (All Time) Calculated using the full available price history since Jan 2, 2003 | 0.96 |
The correlation between RFNBX and CGFAX has been stable across timeframes, ranging from 0.95 to 0.96 - a consistent structural relationship.
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Return for Risk
RFNBX vs. CGFAX — Risk / Return Rank
RFNBX
CGFAX
RFNBX vs. CGFAX - 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 The Growth Fund of America Class 529-A (CGFAX). 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 | CGFAX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.68 | ||
| Sortino ratioReturn per unit of downside risk | +0.88 | ||
| Omega ratioGain probability vs. loss probability | 1.25 | 1.14 | +0.11 |
| Calmar ratioReturn relative to maximum drawdown | 1.98 | 0.90 | +1.08 |
| Martin ratioReturn relative to average drawdown | 8.47 | 3.24 | +5.23 |
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Drawdowns
RFNBX vs. CGFAX - Drawdown Comparison
The maximum RFNBX drawdown since its inception was -53.81%, roughly equal to the maximum CGFAX drawdown of -51.91%. Use the drawdown chart below to compare losses from any high point for RFNBX and CGFAX.
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Drawdown Indicators
| RFNBX | CGFAX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.81% | -51.91% | -1.90% |
Max Drawdown (1Y)Largest decline over 1 year | -10.78% | -13.77% | +2.99% |
Max Drawdown (3Y)Largest decline over 3 years | -18.11% | -21.58% | +3.47% |
Max Drawdown (5Y)Largest decline over 5 years | -25.53% | -36.39% | +10.86% |
Max Drawdown (10Y)Largest decline over 10 years | -33.96% | -36.39% | +2.43% |
Current DrawdownCurrent decline from peak | -2.74% | -4.38% | +1.64% |
Average DrawdownAverage peak-to-trough decline | -7.21% | -8.57% | +1.36% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.51% | 3.80% | -1.29% |
Volatility
RFNBX vs. CGFAX - Volatility Comparison
The current volatility for American Funds Fundamental Investors Fund Class R2 (RFNBX) is 4.22%, while American Funds The Growth Fund of America Class 529-A (CGFAX) has a volatility of 5.01%. This indicates that RFNBX experiences smaller price fluctuations and is considered to be less risky than CGFAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RFNBX | CGFAX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.22% | 5.01% | -0.79% |
Volatility (6M)Calculated over the trailing 6-month period | 12.13% | 13.69% | -1.56% |
Volatility (1Y)Calculated over the trailing 1-year period | 15.16% | 16.94% | -1.78% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.01% | 20.56% | -3.55% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.77% | 19.79% | -2.02% |
RFNBX vs. CGFAX - Expense Ratio Comparison
RFNBX has a 1.36% expense ratio, which is higher than CGFAX's 0.62% expense ratio.
Dividends
RFNBX vs. CGFAX - Dividend Comparison
RFNBX's dividend yield for the trailing twelve months is around 6.84%, less than CGFAX's 10.31% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
CGFAX American Funds The Growth Fund of America Class 529-A | 10.31% | 10.88% | 9.12% | 7.48% | 4.09% | 8.26% | 4.34% | 7.18% | 12.03% | 7.07% | 6.60% | 8.86% |
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
With a correlation of 0.95, RFNBX and CGFAX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.
CGFAX has higher volatility (5.01%) compared to RFNBX (4.22%). In terms of maximum drawdown, RFNBX dropped -53.81% vs CGFAX's -51.91%.
RFNBX currently has the higher Sharpe Ratio (1.40 vs 0.73), 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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