RGABX vs. ACIHX

Last updated Jul 29, 2026

RGABX (American Funds The Growth Fund of America Class R-2) and ACIHX (American Century Growth Fund G Class) are both Large Cap Growth Equities funds. RGABX is passively managed, while ACIHX is actively managed. Over the past 3 years, RGABX returned 18.79%/yr vs 17.16%/yr for ACIHX. Their correlation of 0.94 means they have usually moved in the same direction. RGABX charges 1.38%/yr vs 0.01%/yr for ACIHX.

Performance

RGABX vs. ACIHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Funds The Growth Fund of America Class R-2 (RGABX) and American Century Growth Fund G Class (ACIHX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RGABX achieves a 3.82% return, which is significantly higher than ACIHX's 0.47% return.

RGABX

• 1D: -0.38%
• 1M: -2.39%
• 6M: 1.78%
• YTD: 3.82%
• 1Y: 9.23%
• 3Y*: 18.79%
• 5Y*: 9.13%
• 10Y*: 14.12%
• ALL TIME*: 10.02%

ACIHX

• 1D: -0.02%
• 1M: -1.13%
• 6M: 0.24%
• YTD: 0.47%
• 1Y: 8.53%
• 3Y*: 17.16%
• 5Y*: —
• 10Y*: —
• ALL TIME*: 18.20%

*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)
ACIHX American Century Growth Fund G Class	$0.00	$0.00	$0.00
RGABX American Funds The Growth Fund of America Class R-2	$0.00	$0.00	$0.00

RGABX vs. ACIHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
RGABX American Funds The Growth Fund of America Class R-2	3.82%	18.77%	27.02%	36.16%	-8.32%
ACIHX American Century Growth Fund G Class	0.47%	16.26%	27.35%	44.64%	-6.24%

Correlation

The correlation between RGABX and ACIHX 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.	0.93
Correlation (All Time) Calculated using the full available price history since May 16, 2022	0.94

The correlation between RGABX and ACIHX has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.

Return for Risk

RGABX vs. ACIHX — Risk / Return Rank

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

RGABX

RGABX Risk / Return Rank: 14
RGABX Sharpe Ratio Rank: 14
RGABX Sortino Ratio Rank: 14
RGABX Omega Ratio Rank: 14
RGABX Calmar Ratio Rank: 14
RGABX Martin Ratio Rank: 17

ACIHX

ACIHX Risk / Return Rank: 13
ACIHX Sharpe Ratio Rank: 13
ACIHX Sortino Ratio Rank: 13
ACIHX Omega Ratio Rank: 13
ACIHX Calmar Ratio Rank: 11
ACIHX Martin Ratio Rank: 12

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.

RGABX vs. ACIHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Funds The Growth Fund of America Class R-2 (RGABX) and American Century Growth Fund G Class (ACIHX). 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.

	RGABX	ACIHX	Difference
Sharpe ratio: Return per unit of total volatility	0.56	0.52	+0.04
Sortino ratio: Return per unit of downside risk	0.87	0.82	+0.05
Omega ratio: Gain probability vs. loss probability	1.11	1.10	+0.01
Calmar ratio: Return relative to maximum drawdown	0.67	0.54	+0.13
Martin ratio: Return relative to average drawdown	2.47	1.68	+0.79

RGABX vs. ACIHX - Sharpe Ratio Comparison

The current RGABX Sharpe Ratio is 0.56, which is comparable to the ACIHX Sharpe Ratio of 0.52. The chart below compares the historical Sharpe Ratios of RGABX and ACIHX, 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

RGABX vs. ACIHX - Drawdown Comparison

The maximum RGABX drawdown since its inception was -52.36%, which is greater than ACIHX's maximum drawdown of -24.00%. Use the drawdown chart below to compare losses from any high point for RGABX and ACIHX.

Drawdown Indicators

	RGABX	ACIHX	Difference
Max Drawdown Largest peak-to-trough decline	-52.36%	-24.00%	-28.36%
Max Drawdown (1Y) Largest decline over 1 year	-13.92%	-16.40%	+2.48%
Max Drawdown (3Y) Largest decline over 3 years	-21.67%	-24.00%	+2.33%
Max Drawdown (5Y) Largest decline over 5 years	-36.83%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-36.83%	—	—
Current Drawdown Current decline from peak	-5.69%	-8.25%	+2.56%
Average Drawdown Average peak-to-trough decline	-8.73%	-4.90%	-3.83%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.78%	5.29%	-1.51%

Volatility

RGABX vs. ACIHX - Volatility Comparison

The current volatility for American Funds The Growth Fund of America Class R-2 (RGABX) is 4.46%, while American Century Growth Fund G Class (ACIHX) has a volatility of 5.21%. This indicates that RGABX experiences smaller price fluctuations and is considered to be less risky than ACIHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RGABX	ACIHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.46%	5.21%	-0.75%
Volatility (6M) Calculated over the trailing 6-month period	13.37%	13.50%	-0.13%
Volatility (1Y) Calculated over the trailing 1-year period	16.76%	17.17%	-0.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.54%	21.04%	-0.50%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.78%	21.04%	-1.26%

RGABX vs. ACIHX - Expense Ratio Comparison

RGABX has a 1.38% expense ratio, which is higher than ACIHX's 0.01% expense ratio.

Dividends

RGABX vs. ACIHX - Dividend Comparison

RGABX's dividend yield for the trailing twelve months is around 11.44%, less than ACIHX's 15.87% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACIHX American Century Growth Fund G Class	15.87%	15.95%	5.65%	4.61%	2.86%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
RGABX American Funds The Growth Fund of America Class R-2	11.44%	11.87%	9.61%	7.53%	4.08%	8.80%	4.34%	6.82%	11.94%	6.86%	6.28%	8.54%

Frequently Asked Questions

Can I hold both RGABX and ACIHX in my portfolio?

With a correlation of 0.93, RGABX and ACIHX 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, RGABX or ACIHX?

ACIHX has higher volatility (5.21%) compared to RGABX (4.46%). In terms of maximum drawdown, RGABX dropped -52.36% vs ACIHX's -24.00%.

Which has better risk-adjusted returns?

RGABX currently has the higher Sharpe Ratio (0.56 vs 0.52), 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.