OAKGX vs. BRK-B

Last updated Jun 5, 2026

OAKGX (Oakmark Global Fund) is Global Equities fund managed by Oakmark, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, OAKGX returned 10.05%/yr vs 13.19%/yr for BRK-B. At a 0.49 correlation, their price movements are largely independent.

Performance

OAKGX vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Oakmark Global Fund (OAKGX) 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, OAKGX achieves a 1.84% return, which is significantly higher than BRK-B's -2.89% return. Over the past 10 years, OAKGX has underperformed BRK-B with an annualized return of 10.05%, while BRK-B has yielded a comparatively higher 13.19% annualized return.

OAKGX

• 1D: -1.00%
• 1M: 2.39%
• YTD: 1.84%
• 6M: 5.59%
• 1Y: 14.67%
• 3Y*: 10.07%
• 5Y*: 5.66%
• 10Y*: 10.05%

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)

OAKGX vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
OAKGX Oakmark Global Fund	1.84%	21.19%	2.53%	17.36%	-16.86%	30.47%	9.00%	29.66%	-19.02%	27.05%
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 OAKGX and BRK-B is 0.27, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.27
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 Aug 5, 1999	0.49

Over the past year, the correlation between OAKGX and BRK-B has dropped to 0.27 - well below their long-term average of 0.49, suggesting their price drivers have been diverging.

Return for Risk

OAKGX vs. BRK-B — Risk / Return Rank

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

OAKGX

OAKGX Risk / Return Rank: 16
OAKGX Sharpe Ratio Rank: 16
OAKGX Sortino Ratio Rank: 17
OAKGX Omega Ratio Rank: 15
OAKGX Calmar Ratio Rank: 15
OAKGX Martin Ratio Rank: 15

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.

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

This table presents a comparison of risk-adjusted performance metrics for Oakmark Global Fund (OAKGX) 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.

	OAKGX	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	1.13	-0.01	+1.14
Sortino ratio: Return per unit of downside risk	1.70	0.09	+1.62
Omega ratio: Gain probability vs. loss probability	1.20	1.01	+0.19
Calmar ratio: Return relative to maximum drawdown	1.31	-0.01	+1.32
Martin ratio: Return relative to average drawdown	4.19	-0.03	+4.22
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

OAKGX vs. BRK-B - Sharpe Ratio Comparison

The current OAKGX Sharpe Ratio is 1.13, which is higher than the BRK-B Sharpe Ratio of -0.01. The chart below compares the historical Sharpe Ratios of OAKGX 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

	OAKGX	BRK-B	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.13	-0.01	+1.14
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.31	0.63	-0.32
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.49	0.68	-0.19
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.48	0.00

Drawdowns

OAKGX vs. BRK-B - Drawdown Comparison

The maximum OAKGX drawdown since its inception was -60.43%, which is greater than BRK-B's maximum drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for OAKGX and BRK-B.

Drawdown Indicators

	OAKGX	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-60.43%	-53.86%	-6.57%
Max Drawdown (1Y) Largest decline over 1 year	-11.58%	-9.42%	-2.16%
Max Drawdown (3Y) Largest decline over 3 years	-15.75%	-14.95%	-0.80%
Max Drawdown (5Y) Largest decline over 5 years	-31.54%	-26.58%	-4.96%
Max Drawdown (10Y) Largest decline over 10 years	-45.14%	-29.57%	-15.57%
Current Drawdown Current decline from peak	-2.36%	-9.57%	+7.21%
Average Drawdown Average peak-to-trough decline	-9.38%	-11.07%	+1.69%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.61%	4.47%	-0.86%

Volatility

OAKGX vs. BRK-B - Volatility Comparison

The current volatility for Oakmark Global Fund (OAKGX) is 3.33%, while Berkshire Hathaway Inc. (BRK-B) has a volatility of 4.08%. This indicates that OAKGX 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

	OAKGX	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.33%	4.08%	-0.75%
Volatility (6M) Calculated over the trailing 6-month period	9.82%	10.87%	-1.05%
Volatility (1Y) Calculated over the trailing 1-year period	13.41%	14.39%	-0.98%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	18.51%	17.13%	+1.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.66%	19.43%	+1.23%

Dividends

OAKGX vs. BRK-B - Dividend Comparison

OAKGX's dividend yield for the trailing twelve months is around 1.09%, 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%
OAKGX Oakmark Global Fund	1.09%	1.11%	1.19%	4.35%	0.75%	17.98%	0.16%	3.71%	14.80%	7.50%	1.07%	2.87%

Frequently Asked Questions

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

OAKGX and BRK-B have a correlation of 0.27, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, OAKGX or BRK-B?

BRK-B has higher volatility (4.08%) compared to OAKGX (3.33%). In terms of maximum drawdown, OAKGX dropped -60.43% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

OAKGX currently has the higher Sharpe Ratio (1.13 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.