RBFFX vs. SSAFX
Compare and contrast key facts about American Funds The Bond Fund of America (RBFFX) and State Street Aggregate Bond Index Portfolio (SSAFX).
RBFFX is managed by American Funds. It was launched on Aug 4, 2008. SSAFX is managed by State Street. It was launched on Sep 19, 2014.
Performance
RBFFX vs. SSAFX - Performance Comparison
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RBFFX vs. SSAFX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
RBFFX American Funds The Bond Fund of America | -0.54% | 7.49% | 1.47% | 4.65% | -13.03% | -0.64% | 11.07% | 8.13% | 0.17% | 3.53% |
SSAFX State Street Aggregate Bond Index Portfolio | 0.02% | 6.81% | 1.34% | 5.61% | -13.30% | -1.72% | 978.57% | 8.69% | -0.12% | 3.38% |
Returns By Period
In the year-to-date period, RBFFX achieves a -0.54% return, which is significantly lower than SSAFX's 0.02% return. Over the past 10 years, RBFFX has underperformed SSAFX with an annualized return of 2.04%, while SSAFX has yielded a comparatively higher 27.90% annualized return.
RBFFX
- 1D
- 0.27%
- 1M
- -1.74%
- YTD
- -0.54%
- 6M
- 0.29%
- 1Y
- 3.67%
- 3Y*
- 3.34%
- 5Y*
- 0.14%
- 10Y*
- 2.04%
SSAFX
- 1D
- 0.20%
- 1M
- -1.32%
- YTD
- 0.02%
- 6M
- 0.78%
- 1Y
- 4.05%
- 3Y*
- 3.49%
- 5Y*
- 0.11%
- 10Y*
- 27.90%
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RBFFX vs. SSAFX - Expense Ratio Comparison
RBFFX has a 0.29% expense ratio, which is higher than SSAFX's 0.02% expense ratio.
Return for Risk
RBFFX vs. SSAFX — Risk / Return Rank
RBFFX
SSAFX
RBFFX vs. SSAFX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds The Bond Fund of America (RBFFX) and State Street Aggregate Bond Index Portfolio (SSAFX). 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.
| RBFFX | SSAFX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.91 | 1.04 | -0.13 |
Sortino ratioReturn per unit of downside risk | 1.31 | 1.49 | -0.18 |
Omega ratioGain probability vs. loss probability | 1.16 | 1.18 | -0.02 |
Calmar ratioReturn relative to maximum drawdown | 1.54 | 1.81 | -0.27 |
Martin ratioReturn relative to average drawdown | 4.42 | 4.96 | -0.55 |
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
| RBFFX | SSAFX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.91 | 1.04 | -0.13 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.02 | 0.02 | +0.01 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.42 | 0.10 | +0.32 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.82 | 0.09 | +0.72 |
Correlation
The correlation between RBFFX and SSAFX is 0.93, 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
RBFFX vs. SSAFX - Dividend Comparison
RBFFX's dividend yield for the trailing twelve months is around 4.07%, more than SSAFX's 3.74% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
RBFFX American Funds The Bond Fund of America | 4.07% | 4.43% | 4.61% | 3.53% | 2.42% | 2.31% | 5.34% | 3.76% | 2.67% | 2.14% | 2.07% | 2.30% |
SSAFX State Street Aggregate Bond Index Portfolio | 3.74% | 3.70% | 3.76% | 3.16% | 2.49% | 1.90% | 2.41% | 2.88% | 2.82% | 2.42% | 2.21% | 3.21% |
Drawdowns
RBFFX vs. SSAFX - Drawdown Comparison
The maximum RBFFX drawdown since its inception was -17.62%, smaller than the maximum SSAFX drawdown of -18.74%. Use the drawdown chart below to compare losses from any high point for RBFFX and SSAFX.
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Drawdown Indicators
| RBFFX | SSAFX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -17.62% | -18.74% | +1.12% |
Max Drawdown (1Y)Largest decline over 1 year | -2.94% | -2.52% | -0.42% |
Max Drawdown (5Y)Largest decline over 5 years | -17.62% | -18.10% | +0.48% |
Max Drawdown (10Y)Largest decline over 10 years | -17.62% | -18.74% | +1.12% |
Current DrawdownCurrent decline from peak | -2.25% | -3.00% | +0.75% |
Average DrawdownAverage peak-to-trough decline | -2.82% | -4.44% | +1.62% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.03% | 0.92% | +0.11% |
Volatility
RBFFX vs. SSAFX - Volatility Comparison
The current volatility for American Funds The Bond Fund of America (RBFFX) is 1.49%, while State Street Aggregate Bond Index Portfolio (SSAFX) has a volatility of 1.59%. This indicates that RBFFX experiences smaller price fluctuations and is considered to be less risky than SSAFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RBFFX | SSAFX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.49% | 1.59% | -0.10% |
Volatility (6M)Calculated over the trailing 6-month period | 2.49% | 2.50% | -0.01% |
Volatility (1Y)Calculated over the trailing 1-year period | 4.40% | 4.20% | +0.20% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 5.92% | 5.93% | -0.01% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 4.88% | 277.46% | -272.58% |