RMBPX vs. BRK-B

Last updated Jun 3, 2026

RMBPX (RMB Japan Fund) is Japan Equities fund managed by RMB Funds, while BRK-B (Berkshire Hathaway Inc.) is a stock. At a 0.38 correlation, their price movements are largely independent.

Performance

RMBPX vs. BRK-B - Performance Comparison

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

Returns By Period

RMBPX

• 1D: —
• 1M: —
• YTD: —
• 6M: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

BRK-B

• 1D: 0.26%
• 1M: -0.32%
• YTD: -6.20%
• 6M: -6.94%
• 1Y: -6.23%
• 3Y*: 12.69%
• 5Y*: 10.06%
• 10Y*: 12.82%

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

RMBPX vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
RMBPX RMB Japan Fund	0.00%	-0.24%	-14.03%	19.33%	-14.50%	-2.65%	13.06%	17.64%	-17.62%
BRK-B Berkshire Hathaway Inc.	-6.20%	10.89%	27.09%	15.46%	3.31%	28.95%	2.37%	10.93%	-2.85%

Correlation

The correlation between RMBPX and BRK-B is 0.38, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (3Y) Calculated over the trailing 3-year period	0.16
Correlation (5Y) Calculated over the trailing 5-year period	0.31
Correlation (All Time) Calculated using the full available price history since Jan 16, 2018	0.38

The correlation between RMBPX and BRK-B shifts across timeframes, from 0.16 (3 years) to 0.38 (all time), reflecting how their relationship changes across market environments.

Return for Risk

RMBPX vs. BRK-B — Risk / Return Rank

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

BRK-B

BRK-B Risk / Return Rank: 17
BRK-B Sharpe Ratio Rank: 21
BRK-B Sortino Ratio Rank: 19
BRK-B Omega Ratio Rank: 19
BRK-B Calmar Ratio Rank: 15
BRK-B Martin Ratio Rank: 8

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.

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

This table presents a comparison of risk-adjusted performance metrics for RMB Japan Fund (RMBPX) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	RMBPX	BRK-B	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	-0.44	—
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.59	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.66	—
Sharpe Ratio (All Time) Calculated using the full available price history	—	0.48	—

Drawdowns

Drawdown Indicators

	RMBPX	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	—	-53.86%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-9.42%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-14.95%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-26.58%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-29.57%	—
Current Drawdown Current decline from peak	—	-12.65%	—
Average Drawdown Average peak-to-trough decline	—	-11.07%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	4.73%	—

Volatility

Volatility by Period

	RMBPX	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	3.79%	—
Volatility (6M) Calculated over the trailing 6-month period	—	10.68%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	14.31%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	17.11%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	19.43%	—

Dividends

RMBPX vs. BRK-B - Dividend Comparison

Neither RMBPX nor BRK-B has paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
BRK-B Berkshire Hathaway Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
RMBPX RMB Japan Fund	0.00%	0.00%	3.28%	4.43%	1.04%	8.11%	0.29%	1.15%	0.36%

Frequently Asked Questions

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

RMBPX and BRK-B have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.