PKW vs. PPA

Last updated Jun 4, 2026

PKW (Invesco BuyBack Achievers™ ETF) and PPA (Invesco Aerospace & Defense ETF) are both exchange-traded funds - PKW is a Mid Cap Value Equities fund tracking the NASDAQ US BuyBack Achievers Index, while PPA is a Industrials Equities fund tracking the SPADE Defense Index. Both are passively managed. Over the past 10 years, PKW returned 12.81%/yr vs 17.38%/yr for PPA. A 0.79 correlation means they provide meaningful diversification when combined. PKW charges 0.62%/yr vs 0.61%/yr for PPA.

Performance

PKW vs. PPA - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Invesco BuyBack Achievers™ ETF (PKW) and Invesco Aerospace & Defense ETF (PPA). 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 PPA's 8.54% return. Over the past 10 years, PKW has underperformed PPA with an annualized return of 12.81%, while PPA has yielded a comparatively higher 17.38% annualized 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%

PPA

• 1D: -1.74%
• 1M: 3.19%
• YTD: 8.54%
• 6M: 13.46%
• 1Y: 26.57%
• 3Y*: 28.92%
• 5Y*: 17.82%
• 10Y*: 17.38%

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

PKW vs. PPA - 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%
PPA Invesco Aerospace & Defense ETF	8.54%	37.15%	25.28%	18.41%	9.52%	7.09%	0.45%	39.63%	-7.51%	30.10%

Correlation

The correlation between PKW and PPA is 0.51, 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	0.51
Correlation (3Y) Calculated over the trailing 3-year period	0.66
Correlation (5Y) Calculated over the trailing 5-year period	0.73
Correlation (10Y) Calculated over the trailing 10-year period	0.75
Correlation (All Time) Calculated using the full available price history since Dec 21, 2006	0.79

Over the past year, the correlation between PKW and PPA has dropped to 0.51 - well below their long-term average of 0.79, suggesting their price drivers have been diverging.

PKW vs. PPA - Sectors Allocation Comparison

Sectors	PKW	PPA
Financial Services	29.4%	-
Consumer Cyclical	19.1%	-
Industrials	14.2%	90.1%
Technology	10.8%	9.8%
Healthcare	10.1%	-
Energy	5.6%	-
Communication Services	4.0%	0.1%
Consumer Defensive	3.4%	-
Utilities	2.1%	-
Basic Materials	1.1%	-
Real Estate	0.3%	-

Return for Risk

PKW vs. PPA — 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

PPA

PPA Risk / Return Rank: 37
PPA Sharpe Ratio Rank: 38
PPA Sortino Ratio Rank: 39
PPA Omega Ratio Rank: 35
PPA Calmar Ratio Rank: 38
PPA Martin Ratio Rank: 36

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. PPA - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Invesco BuyBack Achievers™ ETF (PKW) and Invesco Aerospace & Defense ETF (PPA). 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	PPA	Difference
Sharpe ratio: Return per unit of total volatility	1.23	1.40	-0.18
Sortino ratio: Return per unit of downside risk	1.84	2.05	-0.21
Omega ratio: Gain probability vs. loss probability	1.22	1.24	-0.03
Calmar ratio: Return relative to maximum drawdown	2.05	1.95	+0.10
Martin ratio: Return relative to average drawdown	6.46	5.68	+0.77
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. PPA - Sharpe Ratio Comparison

The current PKW Sharpe Ratio is 1.23, which is comparable to the PPA Sharpe Ratio of 1.40. The chart below compares the historical Sharpe Ratios of PKW and PPA, 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	PPA	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.23	1.40	-0.18
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.57	0.97	-0.40
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.65	0.84	-0.20
Sharpe Ratio (All Time) Calculated using the full available price history	0.52	0.66	-0.14

Drawdowns

PKW vs. PPA - Drawdown Comparison

The maximum PKW drawdown since its inception was -54.59%, roughly equal to the maximum PPA drawdown of -57.37%. Use the drawdown chart below to compare losses from any high point for PKW and PPA.

Drawdown Indicators

	PKW	PPA	Difference
Max Drawdown Largest peak-to-trough decline	-54.59%	-57.37%	+2.78%
Max Drawdown (1Y) Largest decline over 1 year	-7.86%	-13.71%	+5.85%
Max Drawdown (3Y) Largest decline over 3 years	-20.91%	-15.24%	-5.67%
Max Drawdown (5Y) Largest decline over 5 years	-23.51%	-18.37%	-5.14%
Max Drawdown (10Y) Largest decline over 10 years	-40.93%	-43.92%	+2.99%
Current Drawdown Current decline from peak	-2.15%	-8.40%	+6.25%
Average Drawdown Average peak-to-trough decline	-7.96%	-9.18%	+1.22%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.49%	4.69%	-2.20%

Volatility

PKW vs. PPA - Volatility Comparison

The current volatility for Invesco BuyBack Achievers™ ETF (PKW) is 3.18%, while Invesco Aerospace & Defense ETF (PPA) has a volatility of 6.73%. This indicates that PKW experiences smaller price fluctuations and is considered to be less risky than PPA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PKW	PPA	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.18%	6.73%	-3.55%
Volatility (6M) Calculated over the trailing 6-month period	9.39%	15.95%	-6.56%
Volatility (1Y) Calculated over the trailing 1-year period	13.14%	19.03%	-5.89%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.45%	18.49%	-1.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	19.78%	20.64%	-0.86%

PKW vs. PPA - Expense Ratio Comparison

PKW has a 0.62% expense ratio, which is higher than PPA's 0.61% expense ratio.

Dividends

PKW vs. PPA - Dividend Comparison

PKW's dividend yield for the trailing twelve months is around 0.90%, more than PPA's 0.39% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
PPA Invesco Aerospace & Defense ETF	0.39%	0.42%	0.61%	0.67%	0.83%	0.59%	0.88%	0.95%	0.90%	0.67%	1.70%	1.41%

Frequently Asked Questions

Can I hold both PKW and PPA in my portfolio?

PKW and PPA have a correlation of 0.51, 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 PPA?

PPA has higher volatility (6.73%) compared to PKW (3.18%). In terms of maximum drawdown, PKW dropped -54.59% vs PPA's -57.37%.

Which ETF is better, PKW or PPA?

On 10-year performance, PPA leads with 17.38% vs 12.81% for PKW. On fees, PPA is cheaper at 0.61% per year. On volatility, PKW has been the lower-risk option at 3.18%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, PKW or PPA?

Over the 10-year period, PPA has performed better with a 17.38% return vs 12.81%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, PKW or PPA?

PPA is cheaper with a 0.61% expense ratio, compared with 0.62% for PKW.

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

PKW has the higher dividend yield at 0.90%, compared with 0.39% for PPA.

What is the main difference between PKW and PPA?

PKW is categorized as Mid Cap Value Equities, while PPA is Industrials Equities. PKW tracks NASDAQ US BuyBack Achievers Index, while PPA tracks SPADE Defense Index. Their fees differ too: 0.62% for PKW and 0.61% for PPA.

Which has better risk-adjusted returns?

PPA currently has the higher Sharpe Ratio (1.40 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.