GABGX vs. ACIHX

Last updated Jun 5, 2026

GABGX (Gabelli Growth Fund) and ACIHX (American Century Growth Fund G Class) are both Large Cap Growth Equities funds. Over the past 3 years, GABGX returned 24.45%/yr vs 22.42%/yr for ACIHX. With a 0.97 correlation, they move nearly in lockstep. GABGX charges 1.34%/yr vs 0.01%/yr for ACIHX.

Performance

GABGX vs. ACIHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Gabelli Growth Fund (GABGX) 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, GABGX achieves a 4.87% return, which is significantly lower than ACIHX's 7.24% return.

GABGX

• 1D: -1.32%
• 1M: 2.76%
• YTD: 4.87%
• 6M: 4.04%
• 1Y: 18.34%
• 3Y*: 24.45%
• 5Y*: 11.83%
• 10Y*: 16.47%

ACIHX

• 1D: -1.57%
• 1M: 5.48%
• YTD: 7.24%
• 6M: 6.26%
• 1Y: 25.16%
• 3Y*: 22.42%
• 5Y*: —
• 10Y*: —

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

GABGX vs. ACIHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
GABGX Gabelli Growth Fund	4.87%	18.67%	35.38%	45.39%	-12.44%
ACIHX American Century Growth Fund G Class	7.24%	16.26%	27.35%	44.64%	-6.24%

Correlation

The correlation between GABGX and ACIHX is 0.95, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.95
Correlation (3Y) Calculated over the trailing 3-year period	0.96
Correlation (All Time) Calculated using the full available price history since May 17, 2022	0.97

The correlation between GABGX and ACIHX has been stable across timeframes, ranging from 0.95 to 0.97 - a consistent structural relationship.

Return for Risk

GABGX vs. ACIHX — Risk / Return Rank

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

GABGX

GABGX Risk / Return Rank: 17
GABGX Sharpe Ratio Rank: 19
GABGX Sortino Ratio Rank: 18
GABGX Omega Ratio Rank: 18
GABGX Calmar Ratio Rank: 13
GABGX Martin Ratio Rank: 15

ACIHX

ACIHX Risk / Return Rank: 26
ACIHX Sharpe Ratio Rank: 32
ACIHX Sortino Ratio Rank: 29
ACIHX Omega Ratio Rank: 30
ACIHX Calmar Ratio Rank: 19
ACIHX Martin Ratio Rank: 20

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.

GABGX vs. ACIHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Gabelli Growth Fund (GABGX) 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.

	GABGX	ACIHX	Difference
Sharpe ratio: Return per unit of total volatility	1.24	1.64	-0.39
Sortino ratio: Return per unit of downside risk	1.78	2.25	-0.47
Omega ratio: Gain probability vs. loss probability	1.22	1.29	-0.07
Calmar ratio: Return relative to maximum drawdown	1.17	1.58	-0.41
Martin ratio: Return relative to average drawdown	4.01	5.29	-1.28
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

GABGX vs. ACIHX - Sharpe Ratio Comparison

The current GABGX Sharpe Ratio is 1.24, which is comparable to the ACIHX Sharpe Ratio of 1.64. The chart below compares the historical Sharpe Ratios of GABGX 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.

Sharpe Ratios by Period

	GABGX	ACIHX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.24	1.64	-0.39
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.51	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.73	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.55	1.00	-0.45

Drawdowns

GABGX vs. ACIHX - Drawdown Comparison

The maximum GABGX drawdown since its inception was -66.39%, which is greater than ACIHX's maximum drawdown of -24.00%. Use the drawdown chart below to compare losses from any high point for GABGX and ACIHX.

Drawdown Indicators

	GABGX	ACIHX	Difference
Max Drawdown Largest peak-to-trough decline	-66.39%	-24.00%	-42.39%
Max Drawdown (1Y) Largest decline over 1 year	-16.53%	-16.40%	-0.13%
Max Drawdown (3Y) Largest decline over 3 years	-22.39%	-24.00%	+1.61%
Max Drawdown (5Y) Largest decline over 5 years	-42.36%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-42.36%	—	—
Current Drawdown Current decline from peak	-2.03%	-2.07%	+0.04%
Average Drawdown Average peak-to-trough decline	-16.69%	-4.89%	-11.80%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.79%	4.87%	-0.08%

Volatility

GABGX vs. ACIHX - Volatility Comparison

Gabelli Growth Fund (GABGX) and American Century Growth Fund G Class (ACIHX) have volatilities of 3.92% and 3.93%, 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

	GABGX	ACIHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.92%	3.93%	-0.01%
Volatility (6M) Calculated over the trailing 6-month period	12.14%	12.02%	+0.12%
Volatility (1Y) Calculated over the trailing 1-year period	15.52%	15.80%	-0.28%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.45%	21.06%	+2.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.51%	21.06%	+1.45%

GABGX vs. ACIHX - Expense Ratio Comparison

GABGX has a 1.34% expense ratio, which is higher than ACIHX's 0.01% expense ratio.

Dividends

GABGX vs. ACIHX - Dividend Comparison

GABGX's dividend yield for the trailing twelve months is around 5.23%, less than ACIHX's 14.87% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACIHX American Century Growth Fund G Class	14.87%	15.95%	5.65%	4.61%	2.86%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
GABGX Gabelli Growth Fund	5.23%	5.49%	6.27%	1.66%	0.00%	5.03%	7.02%	11.48%	5.66%	6.28%	5.17%	8.19%

Frequently Asked Questions

Can I hold both GABGX and ACIHX in my portfolio?

With a correlation of 0.95, GABGX 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, GABGX or ACIHX?

ACIHX has higher volatility (3.93%) compared to GABGX (3.92%). In terms of maximum drawdown, GABGX dropped -66.39% vs ACIHX's -24.00%.

Which has better risk-adjusted returns?

ACIHX currently has the higher Sharpe Ratio (1.64 vs 1.24), 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.