GMWAX vs. BRK-B

Last updated Aug 4, 2026

GMWAX (GMO Global Asset Allocation Fund) is Global Allocation fund managed by GMO, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, GMWAX returned 7.45%/yr vs 13.42%/yr for BRK-B. Their 0.46 correlation means their historical movements had little consistent relationship.

Performance

GMWAX vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in GMO Global Asset Allocation Fund (GMWAX) 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, GMWAX achieves a 12.76% return, which is significantly higher than BRK-B's 2.09% return. Over the past 10 years, GMWAX has underperformed BRK-B with an annualized return of 7.45%, while BRK-B has yielded a comparatively higher 13.42% annualized return.

GMWAX

• 1D: 0.17%
• 1M: 1.81%
• 6M: 7.61%
• YTD: 12.76%
• 1Y: 25.73%
• 3Y*: 13.74%
• 5Y*: 7.24%
• 10Y*: 7.45%
• ALL TIME*: 3.47%

BRK-B

• 1D: 0.31%
• 1M: 1.06%
• 6M: 5.30%
• YTD: 2.09%
• 1Y: 8.52%
• 3Y*: 13.60%
• 5Y*: 12.98%
• 10Y*: 13.42%
• ALL TIME*: 10.72%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
BRK-B Berkshire Hathaway Inc.	$2.09B	$2.04B	$2.40B
GMWAX GMO Global Asset Allocation Fund	$0.00	$0.00	$0.00

GMWAX vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
GMWAX GMO Global Asset Allocation Fund	12.76%	23.40%	0.23%	16.17%	-12.71%	7.03%	6.15%	17.70%	-7.21%	15.73%
BRK-B Berkshire Hathaway Inc.	2.09%	10.89%	27.09%	15.46%	3.31%	28.95%	2.37%	10.93%	3.01%	21.62%

Correlation

The correlation between GMWAX and BRK-B is 0.13, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.13
Correlation (3Y) Balances recent behavior with more history.	0.36
Correlation (5Y) Shows whether the relationship held over a longer period.	0.49
Correlation (10Y) Provides a long-term view across more market conditions.	0.55
Correlation (All Time) Calculated using the full available price history since Jan 2, 1997	0.46

Over the past year, the correlation between GMWAX and BRK-B has dropped to 0.13 - well below their long-term average of 0.46, suggesting their price drivers have been diverging.

Return for Risk

GMWAX vs. BRK-B — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

GMWAX

GMWAX Risk / Return Rank: 94
GMWAX Sharpe Ratio Rank: 97
GMWAX Sortino Ratio Rank: 95
GMWAX Omega Ratio Rank: 93
GMWAX Calmar Ratio Rank: 92
GMWAX Martin Ratio Rank: 92

BRK-B

BRK-B Risk / Return Rank: 61
BRK-B Sharpe Ratio Rank: 65
BRK-B Sortino Ratio Rank: 56
BRK-B Omega Ratio Rank: 55
BRK-B Calmar Ratio Rank: 65
BRK-B Martin Ratio Rank: 64

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

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

This table presents a comparison of risk-adjusted performance metrics for GMO Global Asset Allocation Fund (GMWAX) 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.

	GMWAX	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	2.80	0.58	+2.22
Sortino ratio: Return per unit of downside risk	3.92	0.90	+3.02
Omega ratio: Gain probability vs. loss probability	1.53	1.11	+0.42
Calmar ratio: Return relative to maximum drawdown	3.76	0.91	+2.85
Martin ratio: Return relative to average drawdown	14.03	1.91	+12.12

GMWAX vs. BRK-B - Sharpe Ratio Comparison

The current GMWAX Sharpe Ratio is 2.80, which is higher than the BRK-B Sharpe Ratio of 0.58. The chart below compares the historical Sharpe Ratios of GMWAX 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

GMWAX vs. BRK-B - Drawdown Comparison

The maximum GMWAX drawdown since its inception was -41.69%, smaller than the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for GMWAX and BRK-B.

Drawdown Indicators

	GMWAX	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-41.69%	-53.86%	+12.17%
Max Drawdown (1Y) Largest decline over 1 year	-6.87%	-9.42%	+2.55%
Max Drawdown (3Y) Largest decline over 3 years	-13.17%	-14.95%	+1.78%
Max Drawdown (5Y) Largest decline over 5 years	-21.47%	-26.58%	+5.11%
Max Drawdown (10Y) Largest decline over 10 years	-25.12%	-29.57%	+4.45%
Current Drawdown Current decline from peak	0.00%	-4.94%	+4.94%
Average Drawdown Average peak-to-trough decline	-11.17%	-11.06%	-0.11%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.84%	4.49%	-2.65%

Volatility

GMWAX vs. BRK-B - Volatility Comparison

The current volatility for GMO Global Asset Allocation Fund (GMWAX) is 2.31%, while Berkshire Hathaway Inc. (BRK-B) has a volatility of 4.32%. This indicates that GMWAX 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

	GMWAX	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.31%	4.32%	-2.01%
Volatility (6M) Calculated over the trailing 6-month period	7.58%	11.11%	-3.53%
Volatility (1Y) Calculated over the trailing 1-year period	9.24%	14.79%	-5.55%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.07%	17.12%	-7.05%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	10.33%	19.43%	-9.10%

Dividends

GMWAX vs. BRK-B - Dividend Comparison

GMWAX's dividend yield for the trailing twelve months is around 4.42%, 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%
GMWAX GMO Global Asset Allocation Fund	4.42%	4.88%	0.14%	5.47%	3.78%	6.16%	4.00%	4.00%	3.77%	2.50%	2.25%	3.13%

Frequently Asked Questions

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

GMWAX and BRK-B have a correlation of 0.13, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, GMWAX or BRK-B?

BRK-B has higher volatility (4.32%) compared to GMWAX (2.31%). In terms of maximum drawdown, GMWAX dropped -41.69% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

GMWAX currently has the higher Sharpe Ratio (2.80 vs 0.58), 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.