RBATX vs. AMCPX

Last updated Jun 23, 2026

RBATX (American Funds 2010 Target Date Retirement Fund Class R2) and AMCPX (American Funds AMCAP Fund Class A) are both mutual funds - RBATX is a Target Retirement Date fund actively managed by American Funds, while AMCPX is a Large Cap Growth Equities fund actively managed by American Funds. Both are actively managed. Over the past 10 years, RBATX returned 5.36%/yr vs 12.36%/yr for AMCPX. Their correlation of 0.86 suggests significant overlap in exposure. RBATX charges 1.37%/yr vs 0.64%/yr for AMCPX.

Performance

RBATX vs. AMCPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds 2010 Target Date Retirement Fund Class R2 (RBATX) and American Funds AMCAP Fund Class A (AMCPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RBATX achieves a 3.31% return, which is significantly lower than AMCPX's 5.53% return. Over the past 10 years, RBATX has underperformed AMCPX with an annualized return of 5.36%, while AMCPX has yielded a comparatively higher 12.36% annualized return.

RBATX

• 1D: 0.16%
• 1M: 0.32%
• YTD: 3.31%
• 6M: 3.41%
• 1Y: 9.94%
• 3Y*: 8.82%
• 5Y*: 4.42%
• 10Y*: 5.36%

AMCPX

• 1D: 1.49%
• 1M: 1.54%
• YTD: 5.53%
• 6M: 5.33%
• 1Y: 20.65%
• 3Y*: 18.68%
• 5Y*: 9.06%
• 10Y*: 12.36%

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

RBATX vs. AMCPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
RBATX American Funds 2010 Target Date Retirement Fund Class R2	3.31%	11.80%	7.05%	7.53%	-10.21%	8.18%	8.06%	12.59%	-3.57%	9.21%
AMCPX American Funds AMCAP Fund Class A	5.53%	17.68%	21.11%	31.04%	-28.67%	20.57%	21.42%	26.35%	-4.42%	22.08%

Correlation

The correlation between RBATX and AMCPX is 0.78, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (5Y) Calculated over the trailing 5-year period	0.79
Correlation (10Y) Calculated over the trailing 10-year period	0.82
Correlation (All Time) Calculated using the full available price history since Jan 2, 2008	0.86

The correlation between RBATX and AMCPX has been stable across timeframes, ranging from 0.77 to 0.86 - a consistent structural relationship.

Return for Risk

RBATX vs. AMCPX — Risk / Return Rank

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

RBATX

RBATX Risk / Return Rank: 50
RBATX Sharpe Ratio Rank: 54
RBATX Sortino Ratio Rank: 53
RBATX Omega Ratio Rank: 56
RBATX Calmar Ratio Rank: 38
RBATX Martin Ratio Rank: 48

AMCPX

AMCPX Risk / Return Rank: 23
AMCPX Sharpe Ratio Rank: 24
AMCPX Sortino Ratio Rank: 23
AMCPX Omega Ratio Rank: 25
AMCPX Calmar Ratio Rank: 18
AMCPX Martin Ratio Rank: 25

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.

RBATX vs. AMCPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds 2010 Target Date Retirement Fund Class R2 (RBATX) and American Funds AMCAP Fund Class A (AMCPX). 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.

	RBATX	AMCPX	Difference
Sharpe ratio: Return per unit of total volatility	2.00	1.32	+0.68
Sortino ratio: Return per unit of downside risk	2.83	1.87	+0.96
Omega ratio: Gain probability vs. loss probability	1.38	1.24	+0.14
Calmar ratio: Return relative to maximum drawdown	2.22	1.43	+0.79
Martin ratio: Return relative to average drawdown	9.41	5.70	+3.71

RBATX vs. AMCPX - Sharpe Ratio Comparison

The current RBATX Sharpe Ratio is 2.00, which is higher than the AMCPX Sharpe Ratio of 1.32. The chart below compares the historical Sharpe Ratios of RBATX and AMCPX, 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

RBATX vs. AMCPX - Drawdown Comparison

The maximum RBATX drawdown since its inception was -38.65%, smaller than the maximum AMCPX drawdown of -62.37%. Use the drawdown chart below to compare losses from any high point for RBATX and AMCPX.

Drawdown Indicators

	RBATX	AMCPX	Difference
Max Drawdown Largest peak-to-trough decline	-38.65%	-62.37%	+23.72%
Max Drawdown (1Y) Largest decline over 1 year	-4.49%	-14.18%	+9.69%
Max Drawdown (3Y) Largest decline over 3 years	-5.75%	-19.71%	+13.96%
Max Drawdown (5Y) Largest decline over 5 years	-15.49%	-36.90%	+21.41%
Max Drawdown (10Y) Largest decline over 10 years	-15.49%	-36.90%	+21.41%
Current Drawdown Current decline from peak	-0.56%	-1.53%	+0.97%
Average Drawdown Average peak-to-trough decline	-4.25%	-9.57%	+5.32%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.06%	3.55%	-2.49%

Volatility

RBATX vs. AMCPX - Volatility Comparison

The current volatility for American Funds 2010 Target Date Retirement Fund Class R2 (RBATX) is 1.80%, while American Funds AMCAP Fund Class A (AMCPX) has a volatility of 5.90%. This indicates that RBATX experiences smaller price fluctuations and is considered to be less risky than AMCPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RBATX	AMCPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.80%	5.90%	-4.10%
Volatility (6M) Calculated over the trailing 6-month period	4.03%	12.43%	-8.40%
Volatility (1Y) Calculated over the trailing 1-year period	5.00%	15.38%	-10.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.56%	19.37%	-12.81%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	6.71%	18.78%	-12.07%

RBATX vs. AMCPX - Expense Ratio Comparison

RBATX has a 1.37% expense ratio, which is higher than AMCPX's 0.64% expense ratio.

Dividends

RBATX vs. AMCPX - Dividend Comparison

RBATX's dividend yield for the trailing twelve months is around 5.95%, less than AMCPX's 12.62% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMCPX American Funds AMCAP Fund Class A	12.62%	8.73%	8.19%	3.26%	7.54%	3.43%	3.88%	4.90%	7.84%	5.37%	3.81%	8.86%
RBATX American Funds 2010 Target Date Retirement Fund Class R2	5.95%	6.15%	4.36%	2.80%	2.58%	3.02%	3.02%	2.73%	3.00%	1.73%	1.96%	3.88%

Frequently Asked Questions

Can I hold both RBATX and AMCPX in my portfolio?

RBATX and AMCPX have a correlation of 0.78, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RBATX or AMCPX?

AMCPX has higher volatility (5.90%) compared to RBATX (1.80%). In terms of maximum drawdown, RBATX dropped -38.65% vs AMCPX's -62.37%.

Which has better risk-adjusted returns?

RBATX currently has the higher Sharpe Ratio (2.00 vs 1.32), 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.