OAKWX vs. BRK-B

Last updated Jun 5, 2026

OAKWX (Oakmark Global Select Fund) is Global Equities fund managed by Oakmark, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, OAKWX returned 8.70%/yr vs 13.19%/yr for BRK-B. A 0.60 correlation means they provide meaningful diversification when combined.

Performance

OAKWX vs. BRK-B - Performance Comparison

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

Returns By Period

In the year-to-date period, OAKWX achieves a -4.93% return, which is significantly lower than BRK-B's -2.89% return. Over the past 10 years, OAKWX has underperformed BRK-B with an annualized return of 8.70%, while BRK-B has yielded a comparatively higher 13.19% annualized return.

OAKWX

• 1D: -0.91%
• 1M: 0.16%
• YTD: -4.93%
• 6M: -2.79%
• 1Y: 3.21%
• 3Y*: 9.15%
• 5Y*: 3.42%
• 10Y*: 8.70%

BRK-B

• 1D: 1.98%
• 1M: 3.90%
• YTD: -2.89%
• 6M: -3.21%
• 1Y: -0.12%
• 3Y*: 13.55%
• 5Y*: 10.78%
• 10Y*: 13.19%

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

OAKWX vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OAKWX Oakmark Global Select Fund	-4.93%	20.73%	4.68%	22.72%	-22.48%	25.99%	13.04%	29.82%	-21.20%	21.15%
BRK-B Berkshire Hathaway Inc.	-2.89%	10.89%	27.09%	15.46%	3.31%	28.95%	2.37%	10.93%	3.01%	21.62%

Correlation

The correlation between OAKWX and BRK-B is 0.29, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.29
Correlation (3Y) Calculated over the trailing 3-year period	0.46
Correlation (5Y) Calculated over the trailing 5-year period	0.57
Correlation (10Y) Calculated over the trailing 10-year period	0.63
Correlation (All Time) Calculated using the full available price history since Oct 3, 2006	0.60

Over the past year, the correlation between OAKWX and BRK-B has dropped to 0.29 - well below their long-term average of 0.60, suggesting their price drivers have been diverging.

Return for Risk

OAKWX vs. BRK-B — Risk / Return Rank

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

OAKWX

OAKWX Risk / Return Rank: 4
OAKWX Sharpe Ratio Rank: 5
OAKWX Sortino Ratio Rank: 5
OAKWX Omega Ratio Rank: 4
OAKWX Calmar Ratio Rank: 4
OAKWX Martin Ratio Rank: 4

BRK-B

BRK-B Risk / Return Rank: 38
BRK-B Sharpe Ratio Rank: 41
BRK-B Sortino Ratio Rank: 33
BRK-B Omega Ratio Rank: 32
BRK-B Calmar Ratio Rank: 41
BRK-B Martin Ratio Rank: 41

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.

OAKWX vs. BRK-B - Risk-Adjusted Trends Comparison

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

	OAKWX	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	0.28	-0.01	+0.29
Sortino ratio: Return per unit of downside risk	0.51	0.09	+0.42
Omega ratio: Gain probability vs. loss probability	1.06	1.01	+0.05
Calmar ratio: Return relative to maximum drawdown	0.25	-0.01	+0.26
Martin ratio: Return relative to average drawdown	0.65	-0.03	+0.68
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OAKWX vs. BRK-B - Sharpe Ratio Comparison

The current OAKWX Sharpe Ratio is 0.28, which is higher than the BRK-B Sharpe Ratio of -0.01. The chart below compares the historical Sharpe Ratios of OAKWX and BRK-B, 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

	OAKWX	BRK-B	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.28	-0.01	+0.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.20	0.63	-0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.46	0.68	-0.23
Sharpe Ratio (All Time) Calculated using the full available price history	0.38	0.48	-0.10

Drawdowns

OAKWX vs. BRK-B - Drawdown Comparison

The maximum OAKWX drawdown since its inception was -54.43%, roughly equal to the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for OAKWX and BRK-B.

Drawdown Indicators

	OAKWX	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-54.43%	-53.86%	-0.57%
Max Drawdown (1Y) Largest decline over 1 year	-14.26%	-9.42%	-4.84%
Max Drawdown (3Y) Largest decline over 3 years	-14.26%	-14.95%	+0.69%
Max Drawdown (5Y) Largest decline over 5 years	-32.79%	-26.58%	-6.21%
Max Drawdown (10Y) Largest decline over 10 years	-42.07%	-29.57%	-12.50%
Current Drawdown Current decline from peak	-9.34%	-9.57%	+0.23%
Average Drawdown Average peak-to-trough decline	-9.44%	-11.07%	+1.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	5.40%	4.47%	+0.93%

Volatility

OAKWX vs. BRK-B - Volatility Comparison

The current volatility for Oakmark Global Select Fund (OAKWX) is 2.96%, while Berkshire Hathaway Inc. (BRK-B) has a volatility of 4.08%. This indicates that OAKWX experiences smaller price fluctuations and is considered to be less risky than BRK-B based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	OAKWX	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.96%	4.08%	-1.12%
Volatility (6M) Calculated over the trailing 6-month period	9.44%	10.87%	-1.43%
Volatility (1Y) Calculated over the trailing 1-year period	12.54%	14.39%	-1.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.94%	17.13%	-0.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.15%	19.43%	-0.28%

Dividends

OAKWX vs. BRK-B - Dividend Comparison

OAKWX's dividend yield for the trailing twelve months is around 1.51%, while BRK-B has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
BRK-B 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%
OAKWX Oakmark Global Select Fund	1.51%	1.43%	1.17%	0.83%	0.33%	14.91%	0.00%	1.17%	5.28%	5.48%	1.00%	5.60%

Frequently Asked Questions

Can I hold both OAKWX and BRK-B in my portfolio?

OAKWX and BRK-B have a correlation of 0.29, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OAKWX or BRK-B?

BRK-B has higher volatility (4.08%) compared to OAKWX (2.96%). In terms of maximum drawdown, OAKWX dropped -54.43% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

OAKWX currently has the higher Sharpe Ratio (0.28 vs -0.01), 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.