ACIIX vs. LLPFX

Last updated Jun 24, 2026

ACIIX (American Century Equity Income Fund Class I) and LLPFX (Longleaf Partners Fund) are both Large Cap Value Equities funds. Over the past 10 years, ACIIX returned 9.10%/yr vs 5.91%/yr for LLPFX. A 0.78 correlation means they provide meaningful diversification when combined. ACIIX charges 0.72%/yr vs 0.79%/yr for LLPFX.

Performance

ACIIX vs. LLPFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Equity Income Fund Class I (ACIIX) and Longleaf Partners Fund (LLPFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACIIX achieves a 7.52% return, which is significantly higher than LLPFX's -4.50% return. Over the past 10 years, ACIIX has outperformed LLPFX with an annualized return of 9.10%, while LLPFX has yielded a comparatively lower 5.91% annualized return.

ACIIX

• 1D: 0.11%
• 1M: 0.05%
• YTD: 7.52%
• 6M: 7.14%
• 1Y: 16.11%
• 3Y*: 11.14%
• 5Y*: 7.67%
• 10Y*: 9.10%

LLPFX

• 1D: -0.70%
• 1M: -1.49%
• YTD: -4.50%
• 6M: -5.02%
• 1Y: -0.11%
• 3Y*: 5.96%
• 5Y*: 0.39%
• 10Y*: 5.91%

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

ACIIX vs. LLPFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACIIX American Century Equity Income Fund Class I	7.52%	12.05%	10.58%	4.25%	-2.96%	17.16%	1.19%	24.50%	-3.53%	13.69%
LLPFX Longleaf Partners Fund	-4.50%	2.88%	8.82%	24.50%	-23.20%	23.42%	10.27%	16.81%	-17.94%	15.55%

Correlation

The correlation between ACIIX and LLPFX is 0.72, 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	0.72
Correlation (3Y) Calculated over the trailing 3-year period	0.73
Correlation (5Y) Calculated over the trailing 5-year period	0.75
Correlation (10Y) Calculated over the trailing 10-year period	0.75
Correlation (All Time) Calculated using the full available price history since Jul 8, 1998	0.78

The correlation between ACIIX and LLPFX has been stable across timeframes, ranging from 0.72 to 0.78 - a consistent structural relationship.

Return for Risk

ACIIX vs. LLPFX — Risk / Return Rank

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

ACIIX

ACIIX Risk / Return Rank: 52
ACIIX Sharpe Ratio Rank: 54
ACIIX Sortino Ratio Rank: 62
ACIIX Omega Ratio Rank: 48
ACIIX Calmar Ratio Rank: 53
ACIIX Martin Ratio Rank: 43

LLPFX

LLPFX Risk / Return Rank: 3
LLPFX Sharpe Ratio Rank: 3
LLPFX Sortino Ratio Rank: 3
LLPFX Omega Ratio Rank: 3
LLPFX Calmar Ratio Rank: 3
LLPFX Martin Ratio Rank: 3

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.

ACIIX vs. LLPFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Equity Income Fund Class I (ACIIX) and Longleaf Partners Fund (LLPFX). 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.

	ACIIX	LLPFX	Difference
Sharpe ratio: Return per unit of total volatility	2.00	-0.00	+2.00
Sortino ratio: Return per unit of downside risk	3.01	0.10	+2.91
Omega ratio: Gain probability vs. loss probability	1.35	1.01	+0.34
Calmar ratio: Return relative to maximum drawdown	2.67	-0.00	+2.67
Martin ratio: Return relative to average drawdown	8.68	-0.01	+8.68

ACIIX vs. LLPFX - Sharpe Ratio Comparison

The current ACIIX Sharpe Ratio is 2.00, which is higher than the LLPFX Sharpe Ratio of -0.00. The chart below compares the historical Sharpe Ratios of ACIIX and LLPFX, 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

ACIIX vs. LLPFX - Drawdown Comparison

The maximum ACIIX drawdown since its inception was -39.16%, smaller than the maximum LLPFX drawdown of -65.74%. Use the drawdown chart below to compare losses from any high point for ACIIX and LLPFX.

Drawdown Indicators

	ACIIX	LLPFX	Difference
Max Drawdown Largest peak-to-trough decline	-39.16%	-65.74%	+26.58%
Max Drawdown (1Y) Largest decline over 1 year	-6.38%	-9.77%	+3.39%
Max Drawdown (3Y) Largest decline over 3 years	-10.15%	-19.52%	+9.37%
Max Drawdown (5Y) Largest decline over 5 years	-13.49%	-32.06%	+18.57%
Max Drawdown (10Y) Largest decline over 10 years	-32.76%	-43.57%	+10.81%
Current Drawdown Current decline from peak	-1.33%	-7.95%	+6.62%
Average Drawdown Average peak-to-trough decline	-5.24%	-9.44%	+4.20%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.95%	4.62%	-2.67%

Volatility

ACIIX vs. LLPFX - Volatility Comparison

The current volatility for American Century Equity Income Fund Class I (ACIIX) is 2.56%, while Longleaf Partners Fund (LLPFX) has a volatility of 3.76%. This indicates that ACIIX experiences smaller price fluctuations and is considered to be less risky than LLPFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACIIX	LLPFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.56%	3.76%	-1.20%
Volatility (6M) Calculated over the trailing 6-month period	6.22%	9.04%	-2.82%
Volatility (1Y) Calculated over the trailing 1-year period	8.52%	14.30%	-5.78%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.76%	18.39%	-7.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	13.39%	19.29%	-5.90%

ACIIX vs. LLPFX - Expense Ratio Comparison

ACIIX has a 0.72% expense ratio, which is lower than LLPFX's 0.79% expense ratio.

Dividends

ACIIX vs. LLPFX - Dividend Comparison

ACIIX's dividend yield for the trailing twelve months is around 10.85%, less than LLPFX's 13.48% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACIIX American Century Equity Income Fund Class I	10.85%	10.55%	11.71%	8.21%	8.96%	7.02%	2.18%	7.57%	9.05%	12.14%	8.08%	10.72%
LLPFX Longleaf Partners Fund	13.48%	12.87%	1.02%	0.67%	4.49%	7.79%	2.95%	5.44%	22.49%	8.85%	2.10%	18.65%

Frequently Asked Questions

Can I hold both ACIIX and LLPFX in my portfolio?

ACIIX and LLPFX have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACIIX or LLPFX?

LLPFX has higher volatility (3.76%) compared to ACIIX (2.56%). In terms of maximum drawdown, ACIIX dropped -39.16% vs LLPFX's -65.74%.

Which has better risk-adjusted returns?

ACIIX currently has the higher Sharpe Ratio (2.00 vs -0.00), 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.