CAIFX vs. CAIBX

Last updated Jul 15, 2026

CAIFX (American Funds Capital Income Builder Fund Class F-2) and CAIBX (American Funds Capital Income Builder Class A) are both mutual funds - CAIFX is a Dividend fund actively managed by American Funds, while CAIBX is a Diversified Portfolio fund actively managed by American Funds. Both are actively managed. Over the past 10 years, CAIFX returned 7.95%/yr vs 7.72%/yr for CAIBX. With a 1.00 correlation, they move nearly in lockstep. CAIFX charges 0.37%/yr vs 0.58%/yr for CAIBX.

Performance

CAIFX vs. CAIBX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds Capital Income Builder Fund Class F-2 (CAIFX) and American Funds Capital Income Builder Class A (CAIBX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with CAIFX having a 8.57% return and CAIBX slightly lower at 8.46%. Both investments have delivered pretty close results over the past 10 years, with CAIFX having a 7.95% annualized return and CAIBX not far behind at 7.72%.

CAIFX

• 1D: -0.22%
• 1M: 0.66%
• 6M: 6.89%
• YTD: 8.57%
• 1Y: 15.82%
• 3Y*: 14.64%
• 5Y*: 8.92%
• 10Y*: 7.95%

CAIBX

• 1D: -0.23%
• 1M: 0.63%
• 6M: 6.79%
• YTD: 8.46%
• 1Y: 15.58%
• 3Y*: 14.40%
• 5Y*: 8.68%
• 10Y*: 7.72%

*Multi-year figures are annualized to reflect compound growth (CAGR)

CAIFX vs. CAIBX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
CAIFX American Funds Capital Income Builder Fund Class F-2	8.57%	20.63%	10.47%	9.21%	-6.95%	15.26%	3.41%	17.49%	-7.10%	14.19%
CAIBX American Funds Capital Income Builder Class A	8.46%	20.39%	10.24%	8.95%	-7.14%	14.99%	3.20%	17.23%	-7.28%	13.99%

Correlation

The correlation between CAIFX and CAIBX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	1.00
Correlation (All Time) Calculated using the full available price history since Aug 1, 2008	1.00

The correlation between CAIFX and CAIBX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

CAIFX vs. CAIBX — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

CAIFX

CAIFX Risk / Return Rank: 72
CAIFX Sharpe Ratio Rank: 76
CAIFX Sortino Ratio Rank: 76
CAIFX Omega Ratio Rank: 76
CAIFX Calmar Ratio Rank: 66
CAIFX Martin Ratio Rank: 66

CAIBX

CAIBX Risk / Return Rank: 70
CAIBX Sharpe Ratio Rank: 74
CAIBX Sortino Ratio Rank: 75
CAIBX Omega Ratio Rank: 74
CAIBX Calmar Ratio Rank: 63
CAIBX Martin Ratio Rank: 64

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

CAIFX vs. CAIBX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds Capital Income Builder Fund Class F-2 (CAIFX) 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.

	CAIFX	CAIBX	Difference
Sharpe ratio: Return per unit of total volatility	1.95	1.92	+0.03
Sortino ratio: Return per unit of downside risk	2.80	2.76	+0.04
Omega ratio: Gain probability vs. loss probability	1.37	1.36	+0.01
Calmar ratio: Return relative to maximum drawdown	2.47	2.43	+0.04
Martin ratio: Return relative to average drawdown	9.78	9.61	+0.17

CAIFX vs. CAIBX - Sharpe Ratio Comparison

The current CAIFX Sharpe Ratio is 1.95, which is comparable to the CAIBX Sharpe Ratio of 1.92. The chart below compares the historical Sharpe Ratios of CAIFX and CAIBX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

CAIFX vs. CAIBX - Drawdown Comparison

The maximum CAIFX drawdown since its inception was -36.83%, smaller than the maximum CAIBX drawdown of -43.68%. Use the drawdown chart below to compare losses from any high point for CAIFX and CAIBX.

Drawdown Indicators

	CAIFX	CAIBX	Difference
Max Drawdown Largest peak-to-trough decline	-36.83%	-43.68%	+6.85%
Max Drawdown (1Y) Largest decline over 1 year	-6.47%	-6.47%	0.00%
Max Drawdown (3Y) Largest decline over 3 years	-8.88%	-8.89%	+0.01%
Max Drawdown (5Y) Largest decline over 5 years	-17.51%	-17.65%	+0.14%
Max Drawdown (10Y) Largest decline over 10 years	-25.27%	-25.28%	+0.01%
Current Drawdown Current decline from peak	-0.59%	-0.60%	+0.01%
Average Drawdown Average peak-to-trough decline	-4.68%	-3.80%	-0.88%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.63%	1.63%	0.00%

Volatility

CAIFX vs. CAIBX - Volatility Comparison

American Funds Capital Income Builder Fund Class F-2 (CAIFX) and American Funds Capital Income Builder Class A (CAIBX) have volatilities of 2.10% and 2.11%, 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.

Volatility by Period

	CAIFX	CAIBX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.10%	2.11%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	6.63%	6.64%	-0.01%
Volatility (1Y) Calculated over the trailing 1-year period	8.20%	8.21%	-0.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.99%	10.00%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.76%	10.76%	0.00%

CAIFX vs. CAIBX - Expense Ratio Comparison

CAIFX has a 0.37% expense ratio, which is lower than CAIBX's 0.58% expense ratio.

Dividends

CAIFX vs. CAIBX - Dividend Comparison

CAIFX's dividend yield for the trailing twelve months is around 7.44%, more than CAIBX's 7.23% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CAIBX American Funds Capital Income Builder Class A	7.23%	7.71%	5.76%	3.47%	3.43%	3.14%	3.38%	4.10%	3.55%	4.44%	3.52%	3.62%
CAIFX American Funds Capital Income Builder Fund Class F-2	7.44%	7.93%	5.98%	3.69%	3.66%	3.36%	3.60%	4.31%	3.76%	4.63%	3.73%	3.82%

Frequently Asked Questions

Can I hold both CAIFX and CAIBX in my portfolio?

With a correlation of 1.00, CAIFX 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.

Which is riskier, CAIFX or CAIBX?

CAIBX has higher volatility (2.11%) compared to CAIFX (2.10%). In terms of maximum drawdown, CAIFX dropped -36.83% vs CAIBX's -43.68%.

Which has better risk-adjusted returns?

CAIFX currently has the higher Sharpe Ratio (1.95 vs 1.92), 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.