BRK-B vs. ARKK

Last updated Jul 16, 2026

BRK-B (Berkshire Hathaway Inc.) is a stock, while ARKK (ARK Innovation ETF) is Technology Equities fund actively managed by ARK. Over the past 10 years, BRK-B returned 12.84%/yr vs 15.54%/yr for ARKK. At a 0.29 correlation, their price movements are largely independent.

Performance

BRK-B vs. ARKK - Performance Comparison

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

Returns By Period

In the year-to-date period, BRK-B achieves a -2.84% return, which is significantly lower than ARKK's 3.48% return. Over the past 10 years, BRK-B has underperformed ARKK with an annualized return of 12.84%, while ARKK has yielded a comparatively higher 15.54% annualized return.

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%

ARKK

• 1D: 0.10%
• 1M: -0.04%
• 6M: -4.33%
• YTD: 3.48%
• 1Y: 9.66%
• 3Y*: 18.23%
• 5Y*: -7.08%
• 10Y*: 15.54%

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

BRK-B vs. ARKK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
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%
ARKK ARK Innovation ETF	3.48%	35.49%	8.40%	69.04%	-66.97%	-23.60%	152.71%	35.08%	3.52%	87.33%

Correlation

The correlation between BRK-B and ARKK is -0.05, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.05
Correlation (3Y) Calculated over the trailing 3-year period	0.17
Correlation (5Y) Calculated over the trailing 5-year period	0.26
Correlation (10Y) Calculated over the trailing 10-year period	0.29
Correlation (All Time) Calculated using the full available price history since Oct 31, 2014	0.29

The correlation between BRK-B and ARKK shifts across timeframes, from -0.05 (1 year) to 0.29 (all time), reflecting how their relationship changes across market environments.

Return for Risk

BRK-B vs. ARKK — 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: 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

ARKK

ARKK Risk / Return Rank: 14
ARKK Sharpe Ratio Rank: 14
ARKK Sortino Ratio Rank: 15
ARKK Omega Ratio Rank: 14
ARKK Calmar Ratio Rank: 13
ARKK Martin Ratio Rank: 13

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.

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

This table presents a comparison of risk-adjusted performance metrics for Berkshire Hathaway Inc. (BRK-B) and ARK Innovation ETF (ARKK). 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.

	BRK-B	ARKK	Difference
Sharpe ratio: Return per unit of total volatility	0.27	0.27	0.00
Sortino ratio: Return per unit of downside risk	0.47	0.63	-0.16
Omega ratio: Gain probability vs. loss probability	1.06	1.07	-0.01
Calmar ratio: Return relative to maximum drawdown	0.41	0.31	+0.10
Martin ratio: Return relative to average drawdown	0.87	0.65	+0.22

BRK-B vs. ARKK - Sharpe Ratio Comparison

The current BRK-B Sharpe Ratio is 0.27, which is comparable to the ARKK Sharpe Ratio of 0.27. The chart below compares the historical Sharpe Ratios of BRK-B and ARKK, 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

BRK-B vs. ARKK - Drawdown Comparison

The maximum BRK-B drawdown since its inception was -53.86%, smaller than the maximum ARKK drawdown of -80.97%. Use the drawdown chart below to compare losses from any high point for BRK-B and ARKK.

Drawdown Indicators

	BRK-B	ARKK	Difference
Max Drawdown Largest peak-to-trough decline	-53.86%	-80.97%	+27.11%
Max Drawdown (1Y) Largest decline over 1 year	-9.42%	-31.35%	+21.93%
Max Drawdown (3Y) Largest decline over 3 years	-14.95%	-39.56%	+24.61%
Max Drawdown (5Y) Largest decline over 5 years	-26.58%	-76.27%	+49.69%
Max Drawdown (10Y) Largest decline over 10 years	-29.57%	-80.97%	+51.40%
Current Drawdown Current decline from peak	-9.53%	-48.46%	+38.93%
Average Drawdown Average peak-to-trough decline	-11.06%	-30.29%	+19.23%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.47%	14.95%	-10.48%

Volatility

BRK-B vs. ARKK - Volatility Comparison

The current volatility for Berkshire Hathaway Inc. (BRK-B) is 4.54%, while ARK Innovation ETF (ARKK) has a volatility of 9.72%. This indicates that BRK-B experiences smaller price fluctuations and is considered to be less risky than ARKK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	BRK-B	ARKK	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.54%	9.72%	-5.18%
Volatility (6M) Calculated over the trailing 6-month period	11.04%	26.88%	-15.84%
Volatility (1Y) Calculated over the trailing 1-year period	14.57%	36.33%	-21.76%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.12%	46.47%	-29.35%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.40%	40.41%	-21.01%

Dividends

BRK-B vs. ARKK - Dividend Comparison

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

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ARKK ARK Innovation ETF	0.00%	0.00%	0.00%	0.70%	0.00%	0.55%	1.64%	0.38%	3.14%	1.32%	0.00%	2.27%
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%

Frequently Asked Questions

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

BRK-B and ARKK have a correlation of -0.05, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, BRK-B or ARKK?

ARKK has higher volatility (9.72%) compared to BRK-B (4.54%). In terms of maximum drawdown, BRK-B dropped -53.86% vs ARKK's -80.97%.

Which has better risk-adjusted returns?

BRK-B currently has the higher Sharpe Ratio (0.27 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.