OAKLX vs. BRK-A

Last updated Jun 3, 2026

OAKLX (Oakmark Select Fund) is Large Cap Value Equities fund managed by Oakmark, while BRK-A (Berkshire Hathaway Inc) is a stock. Over the past 10 years, OAKLX returned 11.02%/yr vs 12.82%/yr for BRK-A. At a 0.50 correlation, their price movements are largely independent.

Performance

OAKLX vs. BRK-A - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark Select Fund (OAKLX) and Berkshire Hathaway Inc (BRK-A). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, OAKLX achieves a 1.03% return, which is significantly higher than BRK-A's -6.30% return. Over the past 10 years, OAKLX has underperformed BRK-A with an annualized return of 11.02%, while BRK-A has yielded a comparatively higher 12.82% annualized return.

OAKLX

• 1D: 2.01%
• 1M: 3.97%
• YTD: 1.03%
• 6M: 6.41%
• 1Y: 17.05%
• 3Y*: 16.32%
• 5Y*: 8.84%
• 10Y*: 11.02%

BRK-A

• 1D: 0.29%
• 1M: -0.44%
• YTD: -6.30%
• 6M: -6.96%
• 1Y: -6.30%
• 3Y*: 12.03%
• 5Y*: 10.02%
• 10Y*: 12.82%

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

OAKLX vs. BRK-A - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OAKLX Oakmark Select Fund	1.03%	14.26%	14.15%	43.02%	-22.51%	34.62%	10.76%	27.70%	-24.90%	15.69%
BRK-A Berkshire Hathaway Inc	-6.30%	10.85%	25.49%	15.77%	4.00%	29.57%	2.42%	10.98%	2.82%	21.91%

Correlation

The correlation between OAKLX and BRK-A is 0.26, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.26
Correlation (3Y) Calculated over the trailing 3-year period	0.44
Correlation (5Y) Calculated over the trailing 5-year period	0.57
Correlation (10Y) Calculated over the trailing 10-year period	0.62
Correlation (All Time) Calculated using the full available price history since Nov 1, 1996	0.50

Over the past year, the correlation between OAKLX and BRK-A has dropped to 0.26 - well below their long-term average of 0.50, suggesting their price drivers have been diverging.

Return for Risk

OAKLX vs. BRK-A — Risk / Return Rank

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

OAKLX

OAKLX Risk / Return Rank: 14
OAKLX Sharpe Ratio Rank: 15
OAKLX Sortino Ratio Rank: 15
OAKLX Omega Ratio Rank: 15
OAKLX Calmar Ratio Rank: 14
OAKLX Martin Ratio Rank: 11

BRK-A

BRK-A Risk / Return Rank: 15
BRK-A Sharpe Ratio Rank: 20
BRK-A Sortino Ratio Rank: 19
BRK-A Omega Ratio Rank: 19
BRK-A Calmar Ratio Rank: 13
BRK-A Martin Ratio Rank: 7

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.

OAKLX vs. BRK-A - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Oakmark Select Fund (OAKLX) and Berkshire Hathaway Inc (BRK-A). 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.

	OAKLX	BRK-A	Difference
Sharpe ratio Return per unit of total volatility	1.13	-0.46	+1.59
Sortino ratio Return per unit of downside risk	1.67	-0.54	+2.21
Omega ratio Gain probability vs. loss probability	1.21	0.93	+0.27
Calmar ratio Return relative to maximum drawdown	1.33	-0.73	+2.06
Martin ratio Return relative to average drawdown	3.54	-1.42	+4.96
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OAKLX vs. BRK-A - Sharpe Ratio Comparison

The current OAKLX Sharpe Ratio is 1.13, which is higher than the BRK-A Sharpe Ratio of -0.46. The chart below compares the historical Sharpe Ratios of OAKLX and BRK-A, 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

	OAKLX	BRK-A	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.13	-0.46	+1.59
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.45	0.59	-0.13
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.51	0.68	-0.17
Sharpe Ratio (All Time) Calculated using the full available price history	0.59	0.82	-0.23

Drawdowns

OAKLX vs. BRK-A - Drawdown Comparison

The maximum OAKLX drawdown since its inception was -61.15%, which is greater than BRK-A's maximum drawdown of -51.47%. Use the drawdown chart below to compare losses from any high point for OAKLX and BRK-A.

Drawdown Indicators

	OAKLX	BRK-A	Difference
Max Drawdown Largest peak-to-trough decline	-61.15%	-51.47%	-9.68%
Max Drawdown (1Y) Largest decline over 1 year	-12.49%	-9.12%	-3.37%
Max Drawdown (3Y) Largest decline over 3 years	-18.76%	-14.43%	-4.33%
Max Drawdown (5Y) Largest decline over 5 years	-27.87%	-25.98%	-1.89%
Max Drawdown (10Y) Largest decline over 10 years	-48.42%	-30.43%	-17.99%
Current Drawdown Current decline from peak	-1.53%	-12.62%	+11.09%
Average Drawdown Average peak-to-trough decline	-8.98%	-9.52%	+0.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.70%	4.67%	+0.03%

Volatility

OAKLX vs. BRK-A - Volatility Comparison

Oakmark Select Fund (OAKLX) has a higher volatility of 4.00% compared to Berkshire Hathaway Inc (BRK-A) at 3.63%. This indicates that OAKLX's price experiences larger fluctuations and is considered to be riskier than BRK-A based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OAKLX	BRK-A	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.00%	3.63%	+0.37%
Volatility (6M) Calculated over the trailing 6-month period	10.98%	10.41%	+0.57%
Volatility (1Y) Calculated over the trailing 1-year period	14.72%	13.84%	+0.88%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	19.58%	17.15%	+2.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.57%	18.98%	+2.59%

Dividends

OAKLX vs. BRK-A - Dividend Comparison

OAKLX's dividend yield for the trailing twelve months is around 0.38%, while BRK-A has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BRK-A Berkshire Hathaway Inc	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
OAKLX Oakmark Select Fund	0.38%	0.39%	0.31%	0.51%	0.62%	0.70%	0.00%	0.67%	5.04%	4.20%	4.88%	0.30%

Frequently Asked Questions

Can I hold both OAKLX and BRK-A in my portfolio?

OAKLX and BRK-A have a correlation of 0.26, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OAKLX or BRK-A?

OAKLX has higher volatility (4.00%) compared to BRK-A (3.63%). In terms of maximum drawdown, OAKLX dropped -61.15% vs BRK-A's -51.47%.

Which has better risk-adjusted returns?

OAKLX currently has the higher Sharpe Ratio (1.13 vs -0.46), 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.