MONTX vs. ACIHX

Last updated Jun 23, 2026

MONTX (Monetta Fund) and ACIHX (American Century Growth Fund G Class) are both Large Cap Growth Equities funds. Over the past 3 years, MONTX returned 25.70%/yr vs 20.56%/yr for ACIHX. Their correlation of 0.95 suggests significant overlap in exposure. MONTX charges 1.33%/yr vs 0.01%/yr for ACIHX.

Performance

MONTX vs. ACIHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Monetta Fund (MONTX) 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, MONTX achieves a 12.34% return, which is significantly higher than ACIHX's 4.95% return.

MONTX

• 1D: 1.95%
• 1M: 2.28%
• YTD: 12.34%
• 6M: 10.45%
• 1Y: 27.93%
• 3Y*: 25.70%
• 5Y*: 13.02%
• 10Y*: 15.64%

ACIHX

• 1D: 1.47%
• 1M: -0.26%
• YTD: 4.95%
• 6M: 4.49%
• 1Y: 23.59%
• 3Y*: 20.56%
• 5Y*: —
• 10Y*: —

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

MONTX vs. ACIHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
MONTX Monetta Fund	12.34%	25.79%	28.06%	31.29%	-10.28%
ACIHX American Century Growth Fund G Class	4.95%	16.26%	27.35%	44.64%	-6.24%

Correlation

The correlation between MONTX and ACIHX is 0.90, 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	0.90
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (All Time) Calculated using the full available price history since May 16, 2022	0.95

The correlation between MONTX and ACIHX has been stable across timeframes, ranging from 0.90 to 0.95 - a consistent structural relationship.

Return for Risk

MONTX vs. ACIHX — Risk / Return Rank

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

MONTX

MONTX Risk / Return Rank: 28
MONTX Sharpe Ratio Rank: 31
MONTX Sortino Ratio Rank: 26
MONTX Omega Ratio Rank: 29
MONTX Calmar Ratio Rank: 29
MONTX Martin Ratio Rank: 27

ACIHX

ACIHX Risk / Return Rank: 22
ACIHX Sharpe Ratio Rank: 27
ACIHX Sortino Ratio Rank: 24
ACIHX Omega Ratio Rank: 25
ACIHX Calmar Ratio Rank: 17
ACIHX Martin Ratio Rank: 19

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.

MONTX vs. ACIHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Monetta Fund (MONTX) 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.

	MONTX	ACIHX	Difference
Sharpe ratio: Return per unit of total volatility	1.48	1.38	+0.10
Sortino ratio: Return per unit of downside risk	1.98	1.91	+0.07
Omega ratio: Gain probability vs. loss probability	1.26	1.24	+0.02
Calmar ratio: Return relative to maximum drawdown	1.89	1.39	+0.50
Martin ratio: Return relative to average drawdown	5.89	4.58	+1.32

MONTX vs. ACIHX - Sharpe Ratio Comparison

The current MONTX Sharpe Ratio is 1.48, which is comparable to the ACIHX Sharpe Ratio of 1.38. The chart below compares the historical Sharpe Ratios of MONTX 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

MONTX vs. ACIHX - Drawdown Comparison

The maximum MONTX drawdown since its inception was -67.48%, which is greater than ACIHX's maximum drawdown of -24.00%. Use the drawdown chart below to compare losses from any high point for MONTX and ACIHX.

Drawdown Indicators

	MONTX	ACIHX	Difference
Max Drawdown Largest peak-to-trough decline	-67.48%	-24.00%	-43.48%
Max Drawdown (1Y) Largest decline over 1 year	-14.67%	-16.40%	+1.73%
Max Drawdown (3Y) Largest decline over 3 years	-23.78%	-24.00%	+0.22%
Max Drawdown (5Y) Largest decline over 5 years	-32.94%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-32.94%	—	—
Current Drawdown Current decline from peak	-1.69%	-4.16%	+2.47%
Average Drawdown Average peak-to-trough decline	-18.09%	-4.88%	-13.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.69%	4.98%	-0.29%

Volatility

MONTX vs. ACIHX - Volatility Comparison

Monetta Fund (MONTX) has a higher volatility of 7.80% compared to American Century Growth Fund G Class (ACIHX) at 6.36%. This indicates that MONTX's price experiences larger fluctuations and is considered to be riskier than ACIHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	MONTX	ACIHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	7.80%	6.36%	+1.44%
Volatility (6M) Calculated over the trailing 6-month period	14.49%	13.07%	+1.42%
Volatility (1Y) Calculated over the trailing 1-year period	18.70%	16.53%	+2.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.83%	21.11%	-0.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.68%	21.11%	-0.43%

MONTX vs. ACIHX - Expense Ratio Comparison

MONTX has a 1.33% expense ratio, which is higher than ACIHX's 0.01% expense ratio.

Dividends

MONTX vs. ACIHX - Dividend Comparison

MONTX's dividend yield for the trailing twelve months is around 18.00%, more than ACIHX's 15.20% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACIHX American Century Growth Fund G Class	15.20%	15.95%	5.65%	4.61%	2.86%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MONTX Monetta Fund	18.00%	20.22%	5.87%	0.00%	8.23%	12.76%	4.08%	0.00%	9.33%	6.69%	2.83%	12.43%

Frequently Asked Questions

Can I hold both MONTX and ACIHX in my portfolio?

With a correlation of 0.90, MONTX 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, MONTX or ACIHX?

MONTX has higher volatility (7.80%) compared to ACIHX (6.36%). In terms of maximum drawdown, MONTX dropped -67.48% vs ACIHX's -24.00%.

Which has better risk-adjusted returns?

MONTX currently has the higher Sharpe Ratio (1.48 vs 1.38), 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.