AMCPX vs. RERGX

Last updated Aug 1, 2026

AMCPX (American Funds AMCAP Fund Class A) and RERGX (American Funds EUPAC Fund Class R-6) are both mutual funds - AMCPX is a Large Cap Growth Equities fund actively managed by American Funds, while RERGX is a Foreign Large Cap Equities fund actively managed by American Funds. Both are actively managed. Over the past 10 years, AMCPX returned 11.82%/yr vs 8.65%/yr for RERGX. Their 0.80 correlation means they have sometimes moved together and sometimes differently. AMCPX charges 0.64%/yr vs 0.47%/yr for RERGX.

Performance

AMCPX vs. RERGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds AMCAP Fund Class A (AMCPX) and American Funds EUPAC Fund Class R-6 (RERGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AMCPX achieves a 2.86% return, which is significantly lower than RERGX's 9.58% return. Over the past 10 years, AMCPX has outperformed RERGX with an annualized return of 11.82%, while RERGX has yielded a comparatively lower 8.65% annualized return.

AMCPX

• 1D: 1.01%
• 1M: -2.85%
• 6M: 2.62%
• YTD: 2.86%
• 1Y: 11.19%
• 3Y*: 15.89%
• 5Y*: 7.45%
• 10Y*: 11.82%
• ALL TIME*: 9.63%

RERGX

• 1D: 3.16%
• 1M: -0.78%
• 6M: 3.85%
• YTD: 9.58%
• 1Y: 24.65%
• 3Y*: 13.63%
• 5Y*: 5.11%
• 10Y*: 8.65%
• ALL TIME*: 7.00%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
AMCPX American Funds AMCAP Fund Class A	$0.00	$0.00	$0.00
RERGX American Funds EUPAC Fund Class R-6	$0.00	$0.00	$0.00

AMCPX vs. RERGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AMCPX American Funds AMCAP Fund Class A	2.86%	17.68%	21.11%	31.04%	-28.67%	20.57%	21.42%	26.35%	-4.42%	22.08%
RERGX American Funds EUPAC Fund Class R-6	9.58%	29.34%	3.00%	16.11%	-22.77%	2.84%	25.27%	27.40%	-17.33%	31.19%

Correlation

The correlation between AMCPX and RERGX is 0.77, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.77
Correlation (3Y) Balances recent behavior with more history.	0.76
Correlation (5Y) Shows whether the relationship held over a longer period.	0.80
Correlation (10Y) Provides a long-term view across more market conditions.	0.79
Correlation (All Time) Calculated using the full available price history since Jan 4, 2010	0.80

The correlation between AMCPX and RERGX has been stable across timeframes, ranging from 0.76 to 0.80 - a consistent structural relationship.

Return for Risk

AMCPX vs. RERGX — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

AMCPX

AMCPX Risk / Return Rank: 16
AMCPX Sharpe Ratio Rank: 16
AMCPX Sortino Ratio Rank: 16
AMCPX Omega Ratio Rank: 16
AMCPX Calmar Ratio Rank: 14
AMCPX Martin Ratio Rank: 18

RERGX

RERGX Risk / Return Rank: 51
RERGX Sharpe Ratio Rank: 51
RERGX Sortino Ratio Rank: 51
RERGX Omega Ratio Rank: 53
RERGX Calmar Ratio Rank: 51
RERGX Martin Ratio Rank: 47

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

AMCPX vs. RERGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds AMCAP Fund Class A (AMCPX) and American Funds EUPAC Fund Class R-6 (RERGX). 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.

	AMCPX	RERGX	Difference
Sharpe ratio: Return per unit of total volatility	0.57	1.32	-0.74
Sortino ratio: Return per unit of downside risk	0.90	1.90	-1.00
Omega ratio: Gain probability vs. loss probability	1.11	1.24	-0.13
Calmar ratio: Return relative to maximum drawdown	0.64	1.82	-1.19
Martin ratio: Return relative to average drawdown	2.46	6.46	-4.00

AMCPX vs. RERGX - Sharpe Ratio Comparison

The current AMCPX Sharpe Ratio is 0.57, which is lower than the RERGX Sharpe Ratio of 1.32. The chart below compares the historical Sharpe Ratios of AMCPX and RERGX, 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

AMCPX vs. RERGX - Drawdown Comparison

The maximum AMCPX drawdown since its inception was -62.37%, which is greater than RERGX's maximum drawdown of -37.30%. Use the drawdown chart below to compare losses from any high point for AMCPX and RERGX.

Drawdown Indicators

	AMCPX	RERGX	Difference
Max Drawdown Largest peak-to-trough decline	-62.37%	-37.30%	-25.07%
Max Drawdown (1Y) Largest decline over 1 year	-14.18%	-12.52%	-1.66%
Max Drawdown (3Y) Largest decline over 3 years	-19.71%	-15.62%	-4.09%
Max Drawdown (5Y) Largest decline over 5 years	-36.90%	-37.30%	+0.40%
Max Drawdown (10Y) Largest decline over 10 years	-36.90%	-37.30%	+0.40%
Current Drawdown Current decline from peak	-4.02%	-3.51%	-0.51%
Average Drawdown Average peak-to-trough decline	-9.56%	-9.15%	-0.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.67%	3.53%	+0.14%

Volatility

AMCPX vs. RERGX - Volatility Comparison

The current volatility for American Funds AMCAP Fund Class A (AMCPX) is 3.77%, while American Funds EUPAC Fund Class R-6 (RERGX) has a volatility of 5.66%. This indicates that AMCPX experiences smaller price fluctuations and is considered to be less risky than RERGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AMCPX	RERGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.77%	5.66%	-1.89%
Volatility (6M) Calculated over the trailing 6-month period	12.54%	15.23%	-2.69%
Volatility (1Y) Calculated over the trailing 1-year period	15.72%	17.36%	-1.64%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.41%	17.00%	+2.41%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.75%	16.88%	+1.87%

AMCPX vs. RERGX - Expense Ratio Comparison

AMCPX has a 0.64% expense ratio, which is higher than RERGX's 0.47% expense ratio.

Dividends

AMCPX vs. RERGX - Dividend Comparison

AMCPX's dividend yield for the trailing twelve months is around 12.95%, less than RERGX's 16.76% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMCPX American Funds AMCAP Fund Class A	12.95%	8.73%	8.19%	3.26%	7.54%	3.43%	3.88%	4.90%	7.84%	5.37%	3.81%	8.86%
RERGX American Funds EUPAC Fund Class R-6	16.76%	13.95%	4.96%	3.95%	2.02%	10.19%	0.41%	3.14%	3.17%	4.99%	1.64%	3.43%

Frequently Asked Questions

Can I hold both AMCPX and RERGX in my portfolio?

AMCPX and RERGX have a correlation of 0.77, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AMCPX or RERGX?

RERGX has higher volatility (5.66%) compared to AMCPX (3.77%). In terms of maximum drawdown, AMCPX dropped -62.37% vs RERGX's -37.30%.

Which has better risk-adjusted returns?

RERGX currently has the higher Sharpe Ratio (1.32 vs 0.57), 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.