RFNBX vs. BKTSX
Compare and contrast key facts about American Funds Fundamental Investors Fund Class R2 (RFNBX) and iShares Total U.S. Stock Market Index Fund Class K (BKTSX).
RFNBX is an actively managed fund by Capital Group. It was launched on May 21, 2002. BKTSX is a passively managed fund by iShares that tracks the performance of the Russell 3000 Index. It was launched on Aug 13, 2015.
Performance
RFNBX vs. BKTSX - Performance Comparison
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RFNBX vs. BKTSX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
RFNBX American Funds Fundamental Investors Fund Class R2 | -2.69% | 23.22% | 21.80% | 24.89% | -17.32% | 21.49% | 12.51% | 26.09% | -8.89% | 21.82% |
BKTSX iShares Total U.S. Stock Market Index Fund Class K | -3.25% | 17.15% | 23.83% | 26.02% | -19.05% | 25.56% | 20.82% | 31.12% | -5.37% | 21.02% |
Returns By Period
In the year-to-date period, RFNBX achieves a -2.69% return, which is significantly higher than BKTSX's -3.25% return. Over the past 10 years, RFNBX has underperformed BKTSX with an annualized return of 12.31%, while BKTSX has yielded a comparatively higher 13.72% annualized return.
RFNBX
- 1D
- 0.88%
- 1M
- -4.46%
- YTD
- -2.69%
- 6M
- 0.24%
- 1Y
- 22.59%
- 3Y*
- 19.93%
- 5Y*
- 11.23%
- 10Y*
- 12.31%
BKTSX
- 1D
- 0.74%
- 1M
- -3.44%
- YTD
- -3.25%
- 6M
- -1.39%
- 1Y
- 17.54%
- 3Y*
- 18.17%
- 5Y*
- 10.78%
- 10Y*
- 13.72%
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RFNBX vs. BKTSX - Expense Ratio Comparison
RFNBX has a 1.36% expense ratio, which is higher than BKTSX's 0.02% expense ratio.
Return for Risk
RFNBX vs. BKTSX — Risk / Return Rank
RFNBX
BKTSX
RFNBX vs. BKTSX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds Fundamental Investors Fund Class R2 (RFNBX) and iShares Total U.S. Stock Market Index Fund Class K (BKTSX). 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.
| RFNBX | BKTSX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 1.29 | 1.00 | +0.29 |
Sortino ratioReturn per unit of downside risk | 1.94 | 1.52 | +0.42 |
Omega ratioGain probability vs. loss probability | 1.27 | 1.23 | +0.04 |
Calmar ratioReturn relative to maximum drawdown | 2.12 | 1.53 | +0.59 |
Martin ratioReturn relative to average drawdown | 9.09 | 7.29 | +1.79 |
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
| RFNBX | BKTSX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 1.29 | 1.00 | +0.29 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.67 | 0.62 | +0.05 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.70 | 0.75 | -0.05 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.57 | 0.75 | -0.18 |
Correlation
The correlation between RFNBX and BKTSX is 0.96, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
RFNBX vs. BKTSX - Dividend Comparison
RFNBX's dividend yield for the trailing twelve months is around 8.11%, more than BKTSX's 1.17% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
RFNBX American Funds Fundamental Investors Fund Class R2 | 8.11% | 7.90% | 8.19% | 5.13% | 4.16% | 10.27% | 0.83% | 6.20% | 8.38% | 6.54% | 3.99% | 5.32% |
BKTSX iShares Total U.S. Stock Market Index Fund Class K | 1.17% | 1.14% | 1.27% | 1.46% | 1.64% | 1.58% | 1.51% | 2.15% | 2.49% | 2.17% | 1.54% | 0.00% |
Drawdowns
RFNBX vs. BKTSX - Drawdown Comparison
The maximum RFNBX drawdown since its inception was -53.81%, which is greater than BKTSX's maximum drawdown of -34.97%. Use the drawdown chart below to compare losses from any high point for RFNBX and BKTSX.
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Drawdown Indicators
| RFNBX | BKTSX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -53.81% | -34.97% | -18.84% |
Max Drawdown (1Y)Largest decline over 1 year | -10.78% | -8.87% | -1.91% |
Max Drawdown (5Y)Largest decline over 5 years | -25.53% | -24.98% | -0.55% |
Max Drawdown (10Y)Largest decline over 10 years | -33.96% | -34.97% | +1.01% |
Current DrawdownCurrent decline from peak | -7.34% | -5.50% | -1.84% |
Average DrawdownAverage peak-to-trough decline | -7.29% | -4.59% | -2.70% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.65% | 2.60% | +0.05% |
Volatility
RFNBX vs. BKTSX - Volatility Comparison
American Funds Fundamental Investors Fund Class R2 (RFNBX) has a higher volatility of 5.90% compared to iShares Total U.S. Stock Market Index Fund Class K (BKTSX) at 5.47%. This indicates that RFNBX's price experiences larger fluctuations and is considered to be riskier than BKTSX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RFNBX | BKTSX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.90% | 5.47% | +0.43% |
Volatility (6M)Calculated over the trailing 6-month period | 11.07% | 9.74% | +1.33% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.16% | 18.57% | -0.41% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 16.72% | 17.37% | -0.65% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 17.68% | 18.39% | -0.71% |