CPSA vs. KAPR

Last updated Aug 2, 2026

CPSA (Calamos S&P 500 Structured Alt Protection ETF - August) and KAPR (Innovator Russell 2000 Power Buffer ETF - April) are both Defined Outcome funds - CPSA tracks the MerQube Cap Protect US Lrg Cap PR Index - Aug while KAPR tracks the Russell 2000 Index. Both are passively managed. Over the past year, CPSA returned 6.25% vs 22.54% for KAPR. Their 0.67 correlation means they have sometimes moved together and sometimes differently. CPSA charges 0.69%/yr vs 0.79%/yr for KAPR.

Performance

CPSA vs. KAPR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos S&P 500 Structured Alt Protection ETF - August (CPSA) and Innovator Russell 2000 Power Buffer ETF - April (KAPR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPSA achieves a 3.65% return, which is significantly lower than KAPR's 13.09% return.

CPSA

• 1D: 0.17%
• 1M: 0.47%
• 6M: 3.14%
• YTD: 3.65%
• 1Y: 6.25%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 7.16%

KAPR

• 1D: -0.03%
• 1M: 0.08%
• 6M: 11.66%
• YTD: 13.09%
• 1Y: 22.54%
• 3Y*: 12.02%
• 5Y*: 7.81%
• 10Y*: —
• ALL TIME*: 9.28%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
CPSA Calamos S&P 500 Structured Alt Protection ETF - August	$119.05K	$109.06K	$94.91K
KAPR Innovator Russell 2000 Power Buffer ETF - April	$147.78K	$281.73K	$305.41K

CPSA vs. KAPR - Yearly Performance Comparison

	2026 (YTD)	2025	2024
CPSA Calamos S&P 500 Structured Alt Protection ETF - August	3.65%	7.39%	3.12%
KAPR Innovator Russell 2000 Power Buffer ETF - April	13.09%	7.42%	1.25%

Correlation

The correlation between CPSA and KAPR is 0.63, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.63
Correlation (All Time) Calculated using the full available price history since Aug 1, 2024	0.67

The correlation between CPSA and KAPR has been stable across timeframes, ranging from 0.63 to 0.67 - a consistent structural relationship.

Return for Risk

CPSA vs. KAPR — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

CPSA

CPSA Risk / Return Rank: 96
CPSA Sharpe Ratio Rank: 96
CPSA Sortino Ratio Rank: 97
CPSA Omega Ratio Rank: 96
CPSA Calmar Ratio Rank: 93
CPSA Martin Ratio Rank: 96

KAPR

KAPR Risk / Return Rank: 97
KAPR Sharpe Ratio Rank: 97
KAPR Sortino Ratio Rank: 97
KAPR Omega Ratio Rank: 97
KAPR Calmar Ratio Rank: 97
KAPR Martin Ratio Rank: 98

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

CPSA vs. KAPR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - August (CPSA) and Innovator Russell 2000 Power Buffer ETF - April (KAPR). 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.

	CPSA	KAPR	Difference
Sharpe ratio: Return per unit of total volatility	3.08	3.28	-0.20
Sortino ratio: Return per unit of downside risk	4.96	5.14	-0.17
Omega ratio: Gain probability vs. loss probability	1.66	1.70	-0.04
Calmar ratio: Return relative to maximum drawdown	4.46	8.50	-4.04
Martin ratio: Return relative to average drawdown	25.46	42.63	-17.17

CPSA vs. KAPR - Sharpe Ratio Comparison

The current CPSA Sharpe Ratio is 3.08, which is comparable to the KAPR Sharpe Ratio of 3.28. The chart below compares the historical Sharpe Ratios of CPSA and KAPR, 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

CPSA vs. KAPR - Drawdown Comparison

The maximum CPSA drawdown since its inception was -4.72%, smaller than the maximum KAPR drawdown of -16.91%. Use the drawdown chart below to compare losses from any high point for CPSA and KAPR.

Drawdown Indicators

	CPSA	KAPR	Difference
Max Drawdown Largest peak-to-trough decline	-4.72%	-16.91%	+12.19%
Max Drawdown (1Y) Largest decline over 1 year	-1.47%	-2.52%	+1.05%
Max Drawdown (3Y) Largest decline over 3 years	—	-16.84%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-16.91%	—
Current Drawdown Current decline from peak	0.00%	-0.36%	+0.36%
Average Drawdown Average peak-to-trough decline	-0.36%	-3.83%	+3.47%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.26%	0.50%	-0.24%

Volatility

CPSA vs. KAPR - Volatility Comparison

The current volatility for Calamos S&P 500 Structured Alt Protection ETF - August (CPSA) is 0.26%, while Innovator Russell 2000 Power Buffer ETF - April (KAPR) has a volatility of 1.52%. This indicates that CPSA experiences smaller price fluctuations and is considered to be less risky than KAPR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPSA	KAPR	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.26%	1.52%	-1.26%
Volatility (6M) Calculated over the trailing 6-month period	1.70%	4.77%	-3.07%
Volatility (1Y) Calculated over the trailing 1-year period	2.14%	6.53%	-4.39%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.99%	11.69%	-7.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.99%	11.56%	-7.57%

CPSA vs. KAPR - Expense Ratio Comparison

CPSA has a 0.69% expense ratio, which is lower than KAPR's 0.79% expense ratio.

Dividends

CPSA vs. KAPR - Dividend Comparison

Neither CPSA nor KAPR has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPSA and KAPR in my portfolio?

CPSA and KAPR have a correlation of 0.63, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPSA or KAPR?

KAPR has higher volatility (1.52%) compared to CPSA (0.26%). In terms of maximum drawdown, CPSA dropped -4.72% vs KAPR's -16.91%.

Which ETF is better, CPSA or KAPR?

On 1-year performance, KAPR leads with 22.54% vs 6.25% for CPSA. On fees, CPSA is cheaper at 0.69% per year. On volatility, CPSA has been the lower-risk option at 0.26%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CPSA or KAPR?

Over the 1-year period, KAPR has performed better with a 22.54% return vs 6.25%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPSA or KAPR?

CPSA is cheaper with a 0.69% expense ratio, compared with 0.79% for KAPR.

Which ETF pays a higher dividend yield, CPSA or KAPR?

CPSA and KAPR have nearly identical dividend yields, around 0.00%.

What is the main difference between CPSA and KAPR?

CPSA tracks MerQube Cap Protect US Lrg Cap PR Index - Aug, while KAPR tracks Russell 2000 Index. They also come from different issuers: Calamos and Innovator. Their fees differ too: 0.69% for CPSA and 0.79% for KAPR.

Which has better risk-adjusted returns?

KAPR currently has the higher Sharpe Ratio (3.28 vs 3.08), 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.