MPAIX vs. ACIHX

Last updated Jun 25, 2026

MPAIX (Morgan Stanley Institutional Fund, Inc. Advantage Portfolio) and ACIHX (American Century Growth Fund G Class) are both Large Cap Growth Equities funds. Over the past 3 years, MPAIX returned 17.82%/yr vs 19.72%/yr for ACIHX. A 0.80 correlation means they provide meaningful diversification when combined. MPAIX charges 0.85%/yr vs 0.01%/yr for ACIHX.

Performance

MPAIX vs. ACIHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Morgan Stanley Institutional Fund, Inc. Advantage Portfolio (MPAIX) 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, MPAIX achieves a -8.35% return, which is significantly lower than ACIHX's 1.80% return.

MPAIX

• 1D: 0.04%
• 1M: -1.33%
• YTD: -8.35%
• 6M: -11.08%
• 1Y: -8.81%
• 3Y*: 17.82%
• 5Y*: -2.71%
• 10Y*: 11.71%

ACIHX

• 1D: -1.70%
• 1M: -3.26%
• YTD: 1.80%
• 6M: 0.44%
• 1Y: 16.74%
• 3Y*: 19.72%
• 5Y*: —
• 10Y*: —

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

MPAIX vs. ACIHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022
MPAIX Morgan Stanley Institutional Fund, Inc. Advantage Portfolio	-8.35%	18.96%	36.20%	46.28%	-14.24%
ACIHX American Century Growth Fund G Class	1.80%	16.26%	27.35%	44.64%	-6.24%

Correlation

The correlation between MPAIX and ACIHX is 0.74, 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	0.74
Correlation (3Y) Calculated over the trailing 3-year period	0.77
Correlation (All Time) Calculated using the full available price history since May 16, 2022	0.80

The correlation between MPAIX and ACIHX has been stable across timeframes, ranging from 0.74 to 0.80 - a consistent structural relationship.

Return for Risk

MPAIX vs. ACIHX — Risk / Return Rank

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

MPAIX

MPAIX Risk / Return Rank: 2
MPAIX Sharpe Ratio Rank: 2
MPAIX Sortino Ratio Rank: 2
MPAIX Omega Ratio Rank: 2
MPAIX Calmar Ratio Rank: 2
MPAIX Martin Ratio Rank: 2

ACIHX

ACIHX Risk / Return Rank: 16
ACIHX Sharpe Ratio Rank: 19
ACIHX Sortino Ratio Rank: 17
ACIHX Omega Ratio Rank: 18
ACIHX Calmar Ratio Rank: 13
ACIHX Martin Ratio Rank: 15

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.

MPAIX vs. ACIHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Morgan Stanley Institutional Fund, Inc. Advantage Portfolio (MPAIX) 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.

	MPAIX	ACIHX	Difference
Sharpe ratio: Return per unit of total volatility	-0.28	1.12	-1.40
Sortino ratio: Return per unit of downside risk	-0.23	1.59	-1.81
Omega ratio: Gain probability vs. loss probability	0.97	1.20	-0.23
Calmar ratio: Return relative to maximum drawdown	-0.30	1.14	-1.43
Martin ratio: Return relative to average drawdown	-0.59	3.71	-4.30

MPAIX vs. ACIHX - Sharpe Ratio Comparison

The current MPAIX Sharpe Ratio is -0.28, which is lower than the ACIHX Sharpe Ratio of 1.12. The chart below compares the historical Sharpe Ratios of MPAIX 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

MPAIX vs. ACIHX - Drawdown Comparison

The maximum MPAIX drawdown since its inception was -64.09%, which is greater than ACIHX's maximum drawdown of -24.00%. Use the drawdown chart below to compare losses from any high point for MPAIX and ACIHX.

Drawdown Indicators

	MPAIX	ACIHX	Difference
Max Drawdown Largest peak-to-trough decline	-64.09%	-24.00%	-40.09%
Max Drawdown (1Y) Largest decline over 1 year	-24.41%	-16.40%	-8.01%
Max Drawdown (3Y) Largest decline over 3 years	-27.15%	-24.00%	-3.15%
Max Drawdown (5Y) Largest decline over 5 years	-64.09%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-64.09%	—	—
Current Drawdown Current decline from peak	-17.77%	-7.04%	-10.73%
Average Drawdown Average peak-to-trough decline	-13.54%	-4.88%	-8.66%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.20%	5.01%	+7.19%

Volatility

MPAIX vs. ACIHX - Volatility Comparison

Morgan Stanley Institutional Fund, Inc. Advantage Portfolio (MPAIX) has a higher volatility of 9.30% compared to American Century Growth Fund G Class (ACIHX) at 6.58%. This indicates that MPAIX'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

	MPAIX	ACIHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.30%	6.58%	+2.72%
Volatility (6M) Calculated over the trailing 6-month period	20.33%	13.06%	+7.27%
Volatility (1Y) Calculated over the trailing 1-year period	25.54%	16.67%	+8.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	35.66%	21.12%	+14.54%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	29.62%	21.12%	+8.50%

MPAIX vs. ACIHX - Expense Ratio Comparison

MPAIX has a 0.85% expense ratio, which is higher than ACIHX's 0.01% expense ratio.

Dividends

MPAIX vs. ACIHX - Dividend Comparison

MPAIX's dividend yield for the trailing twelve months is around 0.03%, less than ACIHX's 15.67% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACIHX American Century Growth Fund G Class	15.67%	15.95%	5.65%	4.61%	2.86%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
MPAIX Morgan Stanley Institutional Fund, Inc. Advantage Portfolio	0.03%	0.03%	1.50%	0.00%	28.33%	23.18%	5.16%	3.77%	4.54%	7.43%	2.17%	8.89%

Frequently Asked Questions

Can I hold both MPAIX and ACIHX in my portfolio?

MPAIX and ACIHX have a correlation of 0.74, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, MPAIX or ACIHX?

MPAIX has higher volatility (9.30%) compared to ACIHX (6.58%). In terms of maximum drawdown, MPAIX dropped -64.09% vs ACIHX's -24.00%.

Which has better risk-adjusted returns?

ACIHX currently has the higher Sharpe Ratio (1.12 vs -0.28), 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.