OAKWX vs. BRK-B

Last updated Jul 16, 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 9.11%/yr vs 12.84%/yr for BRK-B. A 0.59 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 -1.56% return, which is significantly higher than BRK-B's -2.84% return. Over the past 10 years, OAKWX has underperformed BRK-B with an annualized return of 9.11%, while BRK-B has yielded a comparatively higher 12.84% annualized return.

OAKWX

• 1D: -0.38%
• 1M: 3.10%
• 6M: -5.88%
• YTD: -1.56%
• 1Y: 5.68%
• 3Y*: 8.49%
• 5Y*: 4.76%
• 10Y*: 9.11%

BRK-B

• 1D: -0.56%
• 1M: -1.45%
• 6M: -0.97%
• YTD: -2.84%
• 1Y: 3.88%
• 3Y*: 12.71%
• 5Y*: 11.94%
• 10Y*: 12.84%

*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	-1.56%	20.73%	4.68%	22.72%	-22.48%	25.99%	13.04%	29.82%	-21.20%	21.15%
BRK-B Berkshire Hathaway Inc.	-2.84%	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 0.26, 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	0.45
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 Oct 2, 2006	0.59

Over the past year, the correlation between OAKWX and BRK-B has dropped to 0.26 - well below their long-term average of 0.59, 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: 7
OAKWX Sharpe Ratio Rank: 7
OAKWX Sortino Ratio Rank: 7
OAKWX Omega Ratio Rank: 7
OAKWX Calmar Ratio Rank: 6
OAKWX Martin Ratio Rank: 6

BRK-B

BRK-B Risk / Return Rank: 52
BRK-B Sharpe Ratio Rank: 56
BRK-B Sortino Ratio Rank: 46
BRK-B Omega Ratio Rank: 45
BRK-B Calmar Ratio Rank: 56
BRK-B Martin Ratio Rank: 57

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.

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.

	OAKWX	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	0.38	0.27	+0.12
Sortino ratio: Return per unit of downside risk	0.66	0.47	+0.19
Omega ratio: Gain probability vs. loss probability	1.08	1.06	+0.02
Calmar ratio: Return relative to maximum drawdown	0.35	0.41	-0.07
Martin ratio: Return relative to average drawdown	0.81	0.87	-0.06

OAKWX vs. BRK-B - Sharpe Ratio Comparison

The current OAKWX Sharpe Ratio is 0.38, which is higher than the BRK-B Sharpe Ratio of 0.27. 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.

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	-6.12%	-9.53%	+3.41%
Average Drawdown Average peak-to-trough decline	-9.44%	-11.06%	+1.62%
Ulcer Index Depth and duration of drawdowns from previous peaks	6.10%	4.47%	+1.63%

Volatility

OAKWX vs. BRK-B - Volatility Comparison

The current volatility for Oakmark Global Select Fund (OAKWX) is 3.76%, while Berkshire Hathaway Inc. (BRK-B) has a volatility of 4.54%. 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	3.76%	4.54%	-0.78%
Volatility (6M) Calculated over the trailing 6-month period	9.85%	11.04%	-1.19%
Volatility (1Y) Calculated over the trailing 1-year period	12.86%	14.57%	-1.71%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.97%	17.12%	-0.15%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.93%	19.40%	-0.47%

Dividends

OAKWX vs. BRK-B - Dividend Comparison

OAKWX's dividend yield for the trailing twelve months is around 1.45%, 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	1.45%	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 0.26, 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 (4.54%) compared to OAKWX (3.76%). 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 (0.38 vs 0.27), 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.