PKW vs. BRK-B

Last updated Jun 5, 2026

PKW (Invesco BuyBack Achievers™ ETF) is Mid Cap Value Equities fund tracking the NASDAQ US BuyBack Achievers Index, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 10 years, PKW returned 12.88%/yr vs 12.93%/yr for BRK-B. A 0.65 correlation means they provide meaningful diversification when combined.

Performance

PKW vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco BuyBack Achievers™ ETF (PKW) 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, PKW achieves a 3.61% return, which is significantly higher than BRK-B's -4.78% return. Both investments have delivered pretty close results over the past 10 years, with PKW having a 12.88% annualized return and BRK-B not far ahead at 12.93%.

PKW

• 1D: 1.15%
• 1M: 0.66%
• YTD: 3.61%
• 6M: 4.78%
• 1Y: 17.94%
• 3Y*: 19.19%
• 5Y*: 10.15%
• 10Y*: 12.88%

BRK-B

• 1D: 0.69%
• 1M: 2.82%
• YTD: -4.78%
• 6M: -4.89%
• 1Y: -2.52%
• 3Y*: 13.36%
• 5Y*: 10.35%
• 10Y*: 12.93%

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

PKW vs. BRK-B - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PKW Invesco BuyBack Achievers™ ETF	3.61%	17.92%	17.33%	17.24%	-10.21%	32.62%	8.41%	34.09%	-10.53%	17.75%
BRK-B Berkshire Hathaway Inc.	-4.78%	10.89%	27.09%	15.46%	3.31%	28.95%	2.37%	10.93%	3.01%	21.62%

Correlation

The correlation between PKW and BRK-B is 0.33, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.33
Correlation (3Y) Calculated over the trailing 3-year period	0.51
Correlation (5Y) Calculated over the trailing 5-year period	0.63
Correlation (10Y) Calculated over the trailing 10-year period	0.69
Correlation (All Time) Calculated using the full available price history since Dec 21, 2006	0.65

Over the past year, the correlation between PKW and BRK-B has dropped to 0.33 - well below their long-term average of 0.65, suggesting their price drivers have been diverging.

Return for Risk

PKW vs. BRK-B — Risk / Return Rank

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

PKW

PKW Risk / Return Rank: 42
PKW Sharpe Ratio Rank: 39
PKW Sortino Ratio Rank: 41
PKW Omega Ratio Rank: 37
PKW Calmar Ratio Rank: 47
PKW Martin Ratio Rank: 45

BRK-B

BRK-B Risk / Return Rank: 31
BRK-B Sharpe Ratio Rank: 34
BRK-B Sortino Ratio Rank: 28
BRK-B Omega Ratio Rank: 27
BRK-B Calmar Ratio Rank: 33
BRK-B Martin Ratio Rank: 32

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.

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

This table presents a comparison of risk-adjusted performance metrics for Invesco BuyBack Achievers™ ETF (PKW) 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.

	PKW	BRK-B	Difference
Sharpe ratio: Return per unit of total volatility	1.37	-0.18	+1.55
Sortino ratio: Return per unit of downside risk	2.04	-0.15	+2.18
Omega ratio: Gain probability vs. loss probability	1.24	0.98	+0.26
Calmar ratio: Return relative to maximum drawdown	2.29	-0.27	+2.56
Martin ratio: Return relative to average drawdown	7.24	-0.57	+7.80
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PKW vs. BRK-B - Sharpe Ratio Comparison

The current PKW Sharpe Ratio is 1.37, which is higher than the BRK-B Sharpe Ratio of -0.18. The chart below compares the historical Sharpe Ratios of PKW 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

	PKW	BRK-B	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.37	-0.18	+1.55
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.58	0.61	-0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.65	0.67	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	0.48	+0.04

Drawdowns

PKW vs. BRK-B - Drawdown Comparison

The maximum PKW drawdown since its inception was -54.59%, roughly equal to the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for PKW and BRK-B.

Drawdown Indicators

	PKW	BRK-B	Difference
Max Drawdown Largest peak-to-trough decline	-54.59%	-53.86%	-0.73%
Max Drawdown (1Y) Largest decline over 1 year	-7.86%	-9.42%	+1.56%
Max Drawdown (3Y) Largest decline over 3 years	-20.91%	-14.95%	-5.96%
Max Drawdown (5Y) Largest decline over 5 years	-23.51%	-26.58%	+3.07%
Max Drawdown (10Y) Largest decline over 10 years	-40.93%	-29.57%	-11.36%
Current Drawdown Current decline from peak	-1.02%	-11.33%	+10.31%
Average Drawdown Average peak-to-trough decline	-7.96%	-11.07%	+3.11%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.49%	4.46%	-1.97%

Volatility

PKW vs. BRK-B - Volatility Comparison

The current volatility for Invesco BuyBack Achievers™ ETF (PKW) is 3.36%, while Berkshire Hathaway Inc. (BRK-B) has a volatility of 3.72%. This indicates that PKW 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

	PKW	BRK-B	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.36%	3.72%	-0.36%
Volatility (6M) Calculated over the trailing 6-month period	9.45%	10.70%	-1.25%
Volatility (1Y) Calculated over the trailing 1-year period	13.15%	14.32%	-1.17%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.45%	17.11%	+0.34%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.78%	19.43%	+0.35%

Dividends

PKW vs. BRK-B - Dividend Comparison

PKW's dividend yield for the trailing twelve months is around 0.89%, 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%
PKW Invesco BuyBack Achievers™ ETF	0.89%	0.99%	0.86%	1.17%	1.22%	0.72%	1.48%	1.30%	1.30%	0.65%	1.59%	1.14%

Frequently Asked Questions

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

PKW and BRK-B have a correlation of 0.33, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PKW or BRK-B?

BRK-B has higher volatility (3.72%) compared to PKW (3.36%). In terms of maximum drawdown, PKW dropped -54.59% vs BRK-B's -53.86%.

Which has better risk-adjusted returns?

PKW currently has the higher Sharpe Ratio (1.37 vs -0.18), 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.