AMECX vs. CAIBX
AMECX (American Funds The Income Fund of America Class A) and CAIBX (American Funds Capital Income Builder Class A) are both Diversified Portfolio funds from American Funds. Both are actively managed. Over the past 10 years, AMECX returned 8.35%/yr vs 7.92%/yr for CAIBX. Their correlation of 0.91 means they have usually moved in the same direction. AMECX charges 0.56%/yr vs 0.58%/yr for CAIBX.
Performance
AMECX vs. CAIBX - Performance Comparison
Loading charts...
Returns By Period
In the year-to-date period, AMECX achieves a 8.47% return, which is significantly lower than CAIBX's 10.38% return. Over the past 10 years, AMECX has outperformed CAIBX with an annualized return of 8.35%, while CAIBX has yielded a comparatively lower 7.92% annualized return.
AMECX
- 1D
- 0.25%
- 1M
- 1.23%
- 6M
- 4.62%
- YTD
- 8.47%
- 1Y
- 16.31%
- 3Y*
- 13.17%
- 5Y*
- 8.30%
- 10Y*
- 8.35%
- ALL TIME*
- 7.75%
CAIBX
- 1D
- 0.76%
- 1M
- 1.60%
- 6M
- 6.96%
- YTD
- 10.38%
- 1Y
- 18.83%
- 3Y*
- 14.73%
- 5Y*
- 9.15%
- 10Y*
- 7.92%
- ALL TIME*
- 9.80%
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 |
AMECX vs. CAIBX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
AMECX American Funds The Income Fund of America Class A | 8.47% | 17.77% | 10.84% | 6.79% | -6.40% | 17.37% | 4.49% | 18.50% | -5.27% | 12.58% |
CAIBX American Funds Capital Income Builder Class A | 10.38% | 20.39% | 10.24% | 8.95% | -7.14% | 14.99% | 3.20% | 17.23% | -7.28% | 13.99% |
Correlation
The correlation between AMECX and CAIBX is 0.93, meaning they have usually moved in the same direction, including during past declines.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.93 |
Correlation (3Y) Balances recent behavior with more history. | 0.96 |
Correlation (5Y) Shows whether the relationship held over a longer period. | 0.97 |
Correlation (10Y) Provides a long-term view across more market conditions. | 0.96 |
Correlation (All Time) Calculated using the full available price history since Jul 30, 1987 | 0.91 |
The correlation between AMECX and CAIBX has been stable across timeframes, ranging from 0.91 to 0.97 - a consistent structural relationship.
Compare stocks, funds, or ETFs
Search for stocks, ETFs, and funds for a quick comparison or use the comparison tool for more options.
Return for Risk
AMECX vs. CAIBX — Risk / Return Rank
AMECX
CAIBX
AMECX vs. CAIBX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for American Funds The Income Fund of America Class A (AMECX) and American Funds Capital Income Builder Class A (CAIBX). 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.
| AMECX | CAIBX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.10 | ||
| Sortino ratioReturn per unit of downside risk | -0.16 | ||
| Omega ratioGain probability vs. loss probability | 1.37 | 1.41 | -0.03 |
| Calmar ratioReturn relative to maximum drawdown | 2.49 | 2.74 | -0.25 |
| Martin ratioReturn relative to average drawdown | 9.13 | 10.94 | -1.81 |
Loading charts...
Drawdowns
AMECX vs. CAIBX - Drawdown Comparison
The maximum AMECX drawdown since its inception was -41.92%, roughly equal to the maximum CAIBX drawdown of -43.68%. Use the drawdown chart below to compare losses from any high point for AMECX and CAIBX.
Loading charts...
Drawdown Indicators
| AMECX | CAIBX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -41.92% | -43.68% | +1.76% |
Max Drawdown (1Y)Largest decline over 1 year | -6.13% | -6.47% | +0.34% |
Max Drawdown (3Y)Largest decline over 3 years | -8.58% | -8.89% | +0.31% |
Max Drawdown (5Y)Largest decline over 5 years | -15.78% | -17.65% | +1.87% |
Max Drawdown (10Y)Largest decline over 10 years | -26.13% | -25.28% | -0.85% |
Current DrawdownCurrent decline from peak | -0.18% | 0.00% | -0.18% |
Average DrawdownAverage peak-to-trough decline | -4.44% | -3.79% | -0.65% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 1.67% | 1.62% | +0.05% |
Volatility
AMECX vs. CAIBX - Volatility Comparison
American Funds The Income Fund of America Class A (AMECX) and American Funds Capital Income Builder Class A (CAIBX) have volatilities of 1.99% and 1.97%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.
Loading charts...
Volatility by Period
| AMECX | CAIBX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 1.99% | 1.97% | +0.02% |
Volatility (6M)Calculated over the trailing 6-month period | 5.86% | 6.56% | -0.70% |
Volatility (1Y)Calculated over the trailing 1-year period | 7.41% | 8.20% | -0.79% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 9.43% | 9.98% | -0.55% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 10.63% | 10.77% | -0.14% |
AMECX vs. CAIBX - Expense Ratio Comparison
AMECX has a 0.56% expense ratio, which is lower than CAIBX's 0.58% expense ratio.
Dividends
AMECX vs. CAIBX - Dividend Comparison
AMECX's dividend yield for the trailing twelve months is around 9.28%, more than CAIBX's 7.11% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
AMECX American Funds The Income Fund of America Class A | 9.28% | 9.94% | 6.38% | 2.93% | 6.98% | 6.67% | 2.80% | 5.01% | 7.48% | 4.26% | 3.09% | 5.09% |
CAIBX American Funds Capital Income Builder Class A | 7.11% | 7.71% | 5.76% | 3.47% | 3.43% | 3.14% | 3.38% | 4.10% | 3.55% | 4.44% | 3.52% | 3.62% |
Frequently Asked Questions
With a correlation of 0.93, AMECX and CAIBX 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.
AMECX has higher volatility (1.99%) compared to CAIBX (1.97%). In terms of maximum drawdown, AMECX dropped -41.92% vs CAIBX's -43.68%.
CAIBX currently has the higher Sharpe Ratio (2.16 vs 2.06), 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.
Find the right allocation for AMECX and CAIBX
Add both to a portfolio and optimize allocations for your target — whether that's maximizing returns, minimizing drawdowns, or balancing risk across holdings.
Open Portfolio Optimizer