OAKMX vs. ACIIX
Compare and contrast key facts about Oakmark Fund Investor Class (OAKMX) and American Century Equity Income Fund Class I (ACIIX).
OAKMX is managed by Oakmark. It was launched on Aug 5, 1991. ACIIX is managed by American Century. It was launched on Jul 8, 1998.
Performance
OAKMX vs. ACIIX - Performance Comparison
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OAKMX vs. ACIIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | |
|---|---|---|---|---|---|---|---|---|---|---|
OAKMX Oakmark Fund Investor Class | -2.47% | 14.13% | 16.02% | 30.92% | -13.38% | 34.85% | 12.90% | 27.14% | -12.76% | 21.12% |
ACIIX American Century Equity Income Fund Class I | 3.68% | 12.05% | 10.58% | 4.25% | -2.96% | 17.16% | 1.19% | 24.50% | -3.53% | 13.69% |
Returns By Period
In the year-to-date period, OAKMX achieves a -2.47% return, which is significantly lower than ACIIX's 3.68% return. Over the past 10 years, OAKMX has outperformed ACIIX with an annualized return of 13.51%, while ACIIX has yielded a comparatively lower 8.99% annualized return.
OAKMX
- 1D
- 1.76%
- 1M
- -3.56%
- YTD
- -2.47%
- 6M
- 2.30%
- 1Y
- 10.13%
- 3Y*
- 16.07%
- 5Y*
- 10.98%
- 10Y*
- 13.51%
ACIIX
- 1D
- 0.92%
- 1M
- -4.65%
- YTD
- 3.68%
- 6M
- 5.70%
- 1Y
- 11.45%
- 3Y*
- 10.04%
- 5Y*
- 7.60%
- 10Y*
- 8.99%
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OAKMX vs. ACIIX - Expense Ratio Comparison
OAKMX has a 0.91% expense ratio, which is higher than ACIIX's 0.72% expense ratio.
Return for Risk
OAKMX vs. ACIIX — Risk / Return Rank
OAKMX
ACIIX
OAKMX vs. ACIIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Oakmark Fund Investor Class (OAKMX) and American Century Equity Income Fund Class I (ACIIX). 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.
| OAKMX | ACIIX | Difference | |
|---|---|---|---|
Sharpe ratioReturn per unit of total volatility | 0.54 | 0.95 | -0.41 |
Sortino ratioReturn per unit of downside risk | 0.87 | 1.37 | -0.50 |
Omega ratioGain probability vs. loss probability | 1.13 | 1.19 | -0.06 |
Calmar ratioReturn relative to maximum drawdown | 0.82 | 1.29 | -0.47 |
Martin ratioReturn relative to average drawdown | 3.26 | 5.04 | -1.79 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| OAKMX | ACIIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.54 | 0.95 | -0.41 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | 0.60 | 0.71 | -0.11 |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | 0.66 | 0.67 | -0.01 |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.71 | 0.53 | +0.17 |
Correlation
The correlation between OAKMX and ACIIX is 0.87, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.
Dividends
OAKMX vs. ACIIX - Dividend Comparison
OAKMX's dividend yield for the trailing twelve months is around 0.94%, less than ACIIX's 10.19% yield.
| TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
OAKMX Oakmark Fund Investor Class | 0.94% | 0.92% | 1.12% | 1.02% | 0.92% | 1.94% | 0.17% | 8.33% | 8.13% | 4.06% | 2.58% | 1.43% |
ACIIX American Century Equity Income Fund Class I | 10.19% | 10.55% | 11.71% | 8.21% | 8.96% | 7.02% | 2.18% | 7.57% | 9.05% | 12.14% | 8.08% | 10.72% |
Drawdowns
OAKMX vs. ACIIX - Drawdown Comparison
The maximum OAKMX drawdown since its inception was -56.19%, which is greater than ACIIX's maximum drawdown of -39.16%. Use the drawdown chart below to compare losses from any high point for OAKMX and ACIIX.
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Drawdown Indicators
| OAKMX | ACIIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -56.19% | -39.16% | -17.03% |
Max Drawdown (1Y)Largest decline over 1 year | -13.46% | -8.96% | -4.50% |
Max Drawdown (5Y)Largest decline over 5 years | -23.68% | -13.49% | -10.19% |
Max Drawdown (10Y)Largest decline over 10 years | -41.43% | -32.76% | -8.67% |
Current DrawdownCurrent decline from peak | -4.97% | -4.86% | -0.11% |
Average DrawdownAverage peak-to-trough decline | -6.41% | -5.26% | -1.15% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 3.39% | 2.32% | +1.07% |
Volatility
OAKMX vs. ACIIX - Volatility Comparison
Oakmark Fund Investor Class (OAKMX) has a higher volatility of 4.20% compared to American Century Equity Income Fund Class I (ACIIX) at 3.01%. This indicates that OAKMX's price experiences larger fluctuations and is considered to be riskier than ACIIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| OAKMX | ACIIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.20% | 3.01% | +1.19% |
Volatility (6M)Calculated over the trailing 6-month period | 10.34% | 6.12% | +4.22% |
Volatility (1Y)Calculated over the trailing 1-year period | 18.77% | 11.62% | +7.15% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 18.35% | 10.74% | +7.61% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 20.43% | 13.37% | +7.06% |