OAYMX vs. OAKMX

Last updated Jun 5, 2026

OAYMX (Oakmark Fund Advisor Class) and OAKMX (Oakmark Fund Investor Class) are both Large Cap Value Equities funds from Oakmark. Over the past 5 years, OAYMX returned 9.18%/yr vs 9.07%/yr for OAKMX. With a 1.00 correlation, they move nearly in lockstep. OAYMX charges 0.70%/yr vs 0.91%/yr for OAKMX.

Performance

OAYMX vs. OAKMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark Fund Advisor Class (OAYMX) and Oakmark Fund Investor Class (OAKMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with OAYMX having a -2.23% return and OAKMX slightly lower at -2.30%.

OAYMX

• 1D: -1.38%
• 1M: -2.17%
• YTD: -2.23%
• 6M: 0.32%
• 1Y: 10.51%
• 3Y*: 14.72%
• 5Y*: 9.18%
• 10Y*: —

OAKMX

• 1D: -1.38%
• 1M: -2.18%
• YTD: -2.30%
• 6M: 0.23%
• 1Y: 10.31%
• 3Y*: 14.50%
• 5Y*: 9.07%
• 10Y*: 13.24%

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

OAYMX vs. OAKMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OAYMX Oakmark Fund Advisor Class	-2.23%	14.35%	16.24%	31.18%	-13.19%	34.49%	13.02%	27.25%	-12.66%	21.28%
OAKMX Oakmark Fund Investor Class	-2.30%	14.13%	16.02%	30.92%	-13.38%	34.85%	12.90%	27.14%	-12.76%	21.12%

Correlation

The correlation between OAYMX and OAKMX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (All Time) Calculated using the full available price history since Dec 1, 2016	1.00

The correlation between OAYMX and OAKMX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

OAYMX vs. OAKMX — Risk / Return Rank

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

OAYMX

OAYMX Risk / Return Rank: 13
OAYMX Sharpe Ratio Rank: 11
OAYMX Sortino Ratio Rank: 11
OAYMX Omega Ratio Rank: 10
OAYMX Calmar Ratio Rank: 18
OAYMX Martin Ratio Rank: 14

OAKMX

OAKMX Risk / Return Rank: 12
OAKMX Sharpe Ratio Rank: 9
OAKMX Sortino Ratio Rank: 10
OAKMX Omega Ratio Rank: 9
OAKMX Calmar Ratio Rank: 16
OAKMX Martin Ratio Rank: 13

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.

OAYMX vs. OAKMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark Fund Advisor Class (OAYMX) and Oakmark Fund Investor Class (OAKMX). 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.

	OAYMX	OAKMX	Difference
Sharpe ratio: Return per unit of total volatility	0.78	0.76	+0.02
Sortino ratio: Return per unit of downside risk	1.20	1.18	+0.02
Omega ratio: Gain probability vs. loss probability	1.14	1.14	0.00
Calmar ratio: Return relative to maximum drawdown	1.46	1.43	+0.04
Martin ratio: Return relative to average drawdown	3.74	3.64	+0.10
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OAYMX vs. OAKMX - Sharpe Ratio Comparison

The current OAYMX Sharpe Ratio is 0.78, which is comparable to the OAKMX Sharpe Ratio of 0.76. The chart below compares the historical Sharpe Ratios of OAYMX and OAKMX, 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

	OAYMX	OAKMX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.78	0.76	+0.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.50	0.50	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.65	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.70	-0.09

Drawdowns

OAYMX vs. OAKMX - Drawdown Comparison

The maximum OAYMX drawdown since its inception was -40.09%, smaller than the maximum OAKMX drawdown of -56.19%. Use the drawdown chart below to compare losses from any high point for OAYMX and OAKMX.

Drawdown Indicators

	OAYMX	OAKMX	Difference
Max Drawdown Largest peak-to-trough decline	-40.09%	-56.19%	+16.10%
Max Drawdown (1Y) Largest decline over 1 year	-6.94%	-6.98%	+0.04%
Max Drawdown (3Y) Largest decline over 3 years	-17.02%	-17.05%	+0.03%
Max Drawdown (5Y) Largest decline over 5 years	-23.55%	-23.68%	+0.13%
Max Drawdown (10Y) Largest decline over 10 years	—	-41.43%	—
Current Drawdown Current decline from peak	-4.74%	-4.80%	+0.06%
Average Drawdown Average peak-to-trough decline	-5.54%	-6.39%	+0.85%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.71%	2.73%	-0.02%

Volatility

OAYMX vs. OAKMX - Volatility Comparison

Oakmark Fund Advisor Class (OAYMX) and Oakmark Fund Investor Class (OAKMX) have volatilities of 3.21% and 3.21%, 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

	OAYMX	OAKMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.21%	3.21%	0.00%
Volatility (6M) Calculated over the trailing 6-month period	9.44%	9.44%	0.00%
Volatility (1Y) Calculated over the trailing 1-year period	13.08%	13.08%	0.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.28%	18.30%	-0.02%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.52%	20.40%	+0.12%

OAYMX vs. OAKMX - Expense Ratio Comparison

OAYMX has a 0.70% expense ratio, which is lower than OAKMX's 0.91% expense ratio.

Dividends

OAYMX vs. OAKMX - Dividend Comparison

OAYMX's dividend yield for the trailing twelve months is around 1.15%, more than OAKMX's 0.94% yield.

Position	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%
OAYMX Oakmark Fund Advisor Class	1.15%	1.12%	1.30%	1.19%	1.16%	1.64%	0.27%	8.44%	8.35%	4.22%	0.00%	0.00%

Frequently Asked Questions

Can I hold both OAYMX and OAKMX in my portfolio?

With a correlation of 1.00, OAYMX and OAKMX 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, OAYMX or OAKMX?

OAKMX has higher volatility (3.21%) compared to OAYMX (3.21%). In terms of maximum drawdown, OAYMX dropped -40.09% vs OAKMX's -56.19%.

Which has better risk-adjusted returns?

OAYMX currently has the higher Sharpe Ratio (0.78 vs 0.76), 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.