PKW vs. COWZ

Last updated Jun 4, 2026

PKW (Invesco BuyBack Achievers™ ETF) and COWZ (Pacer US Cash Cows 100 ETF) are both Mid Cap Value Equities funds - PKW tracks the NASDAQ US BuyBack Achievers Index while COWZ tracks the Pacer US Cash Cows 100 Index. Both are passively managed. Over the past 5 years, PKW returned 9.90%/yr vs 10.57%/yr for COWZ. Their correlation of 0.89 suggests significant overlap in exposure. PKW charges 0.62%/yr vs 0.49%/yr for COWZ.

Performance

PKW vs. COWZ - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco BuyBack Achievers™ ETF (PKW) and Pacer US Cash Cows 100 ETF (COWZ). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PKW achieves a 2.43% return, which is significantly lower than COWZ's 8.18% return.

PKW

• 1D: -0.38%
• 1M: -0.04%
• YTD: 2.43%
• 6M: 3.41%
• 1Y: 16.01%
• 3Y*: 18.60%
• 5Y*: 9.90%
• 10Y*: 12.81%

COWZ

• 1D: -0.34%
• 1M: 2.61%
• YTD: 8.18%
• 6M: 9.03%
• 1Y: 22.23%
• 3Y*: 14.44%
• 5Y*: 10.57%
• 10Y*: —

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

PKW vs. COWZ - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PKW Invesco BuyBack Achievers™ ETF	2.43%	17.92%	17.33%	17.24%	-10.21%	32.62%	8.41%	34.09%	-10.53%	17.75%
COWZ Pacer US Cash Cows 100 ETF	8.18%	8.98%	10.64%	14.73%	0.19%	42.57%	11.65%	23.41%	-10.05%	20.22%

Correlation

The correlation between PKW and COWZ is 0.78, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.78
Correlation (3Y) Calculated over the trailing 3-year period	0.85
Correlation (5Y) Calculated over the trailing 5-year period	0.88
Correlation (All Time) Calculated using the full available price history since Dec 20, 2016	0.89

The correlation between PKW and COWZ shifts across timeframes, from 0.78 (1 year) to 0.89 (all time), reflecting how their relationship changes across market environments.

PKW vs. COWZ - Sectors Allocation Comparison

Sectors	PKW	COWZ
Financial Services	29.4%	-
Consumer Cyclical	19.1%	11.7%
Industrials	14.2%	8.4%
Technology	10.8%	16.0%
Healthcare	10.1%	21.8%
Energy	5.6%	16.9%
Communication Services	4.0%	10.4%
Consumer Defensive	3.4%	10.9%
Utilities	2.1%	-
Basic Materials	1.1%	3.7%
Real Estate	0.3%	-

Return for Risk

PKW vs. COWZ — Risk / Return Rank

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

PKW

PKW Risk / Return Rank: 36
PKW Sharpe Ratio Rank: 34
PKW Sortino Ratio Rank: 34
PKW Omega Ratio Rank: 31
PKW Calmar Ratio Rank: 41
PKW Martin Ratio Rank: 40

COWZ

COWZ Risk / Return Rank: 65
COWZ Sharpe Ratio Rank: 59
COWZ Sortino Ratio Rank: 62
COWZ Omega Ratio Rank: 57
COWZ Calmar Ratio Rank: 83
COWZ Martin Ratio Rank: 65

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. COWZ - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco BuyBack Achievers™ ETF (PKW) and Pacer US Cash Cows 100 ETF (COWZ). 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	COWZ	Difference
Sharpe ratio: Return per unit of total volatility	1.23	2.02	-0.79
Sortino ratio: Return per unit of downside risk	1.84	2.98	-1.14
Omega ratio: Gain probability vs. loss probability	1.22	1.36	-0.14
Calmar ratio: Return relative to maximum drawdown	2.05	4.46	-2.42
Martin ratio: Return relative to average drawdown	6.46	12.19	-5.73
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. COWZ - Sharpe Ratio Comparison

The current PKW Sharpe Ratio is 1.23, which is lower than the COWZ Sharpe Ratio of 2.02. The chart below compares the historical Sharpe Ratios of PKW and COWZ, 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	COWZ	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.23	2.02	-0.79
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.57	0.60	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.65	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	0.65	-0.13

Drawdowns

PKW vs. COWZ - Drawdown Comparison

The maximum PKW drawdown since its inception was -54.59%, which is greater than COWZ's maximum drawdown of -38.63%. Use the drawdown chart below to compare losses from any high point for PKW and COWZ.

Drawdown Indicators

	PKW	COWZ	Difference
Max Drawdown Largest peak-to-trough decline	-54.59%	-38.63%	-15.96%
Max Drawdown (1Y) Largest decline over 1 year	-7.86%	-5.00%	-2.86%
Max Drawdown (3Y) Largest decline over 3 years	-20.91%	-22.00%	+1.09%
Max Drawdown (5Y) Largest decline over 5 years	-23.51%	-22.00%	-1.51%
Max Drawdown (10Y) Largest decline over 10 years	-40.93%	—	—
Current Drawdown Current decline from peak	-2.15%	-0.91%	-1.24%
Average Drawdown Average peak-to-trough decline	-7.96%	-4.81%	-3.15%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.49%	1.83%	+0.66%

Volatility

PKW vs. COWZ - Volatility Comparison

Invesco BuyBack Achievers™ ETF (PKW) has a higher volatility of 3.18% compared to Pacer US Cash Cows 100 ETF (COWZ) at 2.56%. This indicates that PKW's price experiences larger fluctuations and is considered to be riskier than COWZ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PKW	COWZ	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.18%	2.56%	+0.62%
Volatility (6M) Calculated over the trailing 6-month period	9.39%	7.12%	+2.27%
Volatility (1Y) Calculated over the trailing 1-year period	13.14%	11.13%	+2.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.45%	17.63%	-0.18%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.78%	19.93%	-0.15%

PKW vs. COWZ - Expense Ratio Comparison

PKW has a 0.62% expense ratio, which is higher than COWZ's 0.49% expense ratio.

Dividends

PKW vs. COWZ - Dividend Comparison

PKW's dividend yield for the trailing twelve months is around 0.90%, less than COWZ's 1.99% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COWZ Pacer US Cash Cows 100 ETF	1.99%	2.19%	1.82%	1.92%	1.96%	1.48%	2.54%	1.96%	1.67%	1.95%	0.13%	0.00%
PKW Invesco BuyBack Achievers™ ETF	0.90%	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 COWZ in my portfolio?

PKW and COWZ have a correlation of 0.78, 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 COWZ?

PKW has higher volatility (3.18%) compared to COWZ (2.56%). In terms of maximum drawdown, PKW dropped -54.59% vs COWZ's -38.63%.

Which ETF is better, PKW or COWZ?

On 5-year performance, COWZ leads with 10.57% vs 9.90% for PKW. On fees, COWZ is cheaper at 0.49% per year. On volatility, COWZ has been the lower-risk option at 2.56%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PKW or COWZ?

Over the 5-year period, COWZ has performed better with a 10.57% return vs 9.90%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PKW or COWZ?

COWZ is cheaper with a 0.49% expense ratio, compared with 0.62% for PKW.

Which ETF pays a higher dividend yield, PKW or COWZ?

COWZ has the higher dividend yield at 1.99%, compared with 0.90% for PKW.

What is the main difference between PKW and COWZ?

PKW tracks NASDAQ US BuyBack Achievers Index, while COWZ tracks Pacer US Cash Cows 100 Index. They also come from different issuers: Invesco and Pacer. Their fees differ too: 0.62% for PKW and 0.49% for COWZ.

Which has better risk-adjusted returns?

COWZ currently has the higher Sharpe Ratio (2.02 vs 1.23), 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.