IAPR vs. CPSA

Last updated Aug 4, 2026

IAPR (Innovator International Developed Power Buffer ETF - April) and CPSA (Calamos S&P 500 Structured Alt Protection ETF - August) are both Defined Outcome funds - IAPR tracks the MSCI EAFE while CPSA tracks the MerQube Cap Protect US Lrg Cap PR Index - Aug. Both are passively managed. Over the past year, IAPR returned 16.17% vs 6.52% for CPSA. Their 0.57 correlation means they have sometimes moved together and sometimes differently. IAPR charges 0.85%/yr vs 0.69%/yr for CPSA.

Performance

IAPR vs. CPSA - Performance Comparison

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

Returns By Period

In the year-to-date period, IAPR achieves a 9.21% return, which is significantly higher than CPSA's 3.92% return.

IAPR

• 1D: 0.10%
• 1M: 1.09%
• 6M: 7.59%
• YTD: 9.21%
• 1Y: 16.17%
• 3Y*: 10.67%
• 5Y*: 5.49%
• 10Y*: —
• ALL TIME*: 5.67%

CPSA

• 1D: 0.26%
• 1M: 0.73%
• 6M: 3.36%
• YTD: 3.92%
• 1Y: 6.52%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 7.26%

*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	$659.99K	$364.13K	$185.00K
IAPR Innovator International Developed Power Buffer ETF - April	$192.27K	$221.69K	$291.86K

IAPR vs. CPSA - Yearly Performance Comparison

	2026 (YTD)	2025	2024
IAPR Innovator International Developed Power Buffer ETF - April	9.21%	15.51%	-2.99%
CPSA Calamos S&P 500 Structured Alt Protection ETF - August	3.92%	7.39%	3.12%

Correlation

The correlation between IAPR and CPSA is 0.64, 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.	0.64
Correlation (All Time) Calculated using the full available price history since Aug 1, 2024	0.57

The correlation between IAPR and CPSA has been stable across timeframes, ranging from 0.57 to 0.64 - a consistent structural relationship.

Return for Risk

IAPR vs. CPSA — Risk / Return Rank

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

IAPR

IAPR Risk / Return Rank: 93
IAPR Sharpe Ratio Rank: 89
IAPR Sortino Ratio Rank: 92
IAPR Omega Ratio Rank: 91
IAPR Calmar Ratio Rank: 96
IAPR Martin Ratio Rank: 96

CPSA

CPSA Risk / Return Rank: 95
CPSA Sharpe Ratio Rank: 96
CPSA Sortino Ratio Rank: 97
CPSA Omega Ratio Rank: 96
CPSA Calmar Ratio Rank: 92
CPSA Martin Ratio Rank: 96

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.

IAPR vs. CPSA - Risk-Adjusted Trends Comparison

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

	IAPR	CPSA	Difference
Sharpe ratio: Return per unit of total volatility	2.28	3.07	-0.79
Sortino ratio: Return per unit of downside risk	3.50	4.94	-1.44
Omega ratio: Gain probability vs. loss probability	1.46	1.66	-0.20
Calmar ratio: Return relative to maximum drawdown	6.33	4.44	+1.89
Martin ratio: Return relative to average drawdown	24.78	25.36	-0.58

IAPR vs. CPSA - Sharpe Ratio Comparison

The current IAPR Sharpe Ratio is 2.28, which is comparable to the CPSA Sharpe Ratio of 3.07. The chart below compares the historical Sharpe Ratios of IAPR and CPSA, 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

IAPR vs. CPSA - Drawdown Comparison

The maximum IAPR drawdown since its inception was -17.73%, which is greater than CPSA's maximum drawdown of -4.72%. Use the drawdown chart below to compare losses from any high point for IAPR and CPSA.

Drawdown Indicators

	IAPR	CPSA	Difference
Max Drawdown Largest peak-to-trough decline	-17.73%	-4.72%	-13.01%
Max Drawdown (1Y) Largest decline over 1 year	-2.56%	-1.47%	-1.09%
Max Drawdown (3Y) Largest decline over 3 years	-9.46%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-17.73%	—	—
Current Drawdown Current decline from peak	-0.08%	0.00%	-0.08%
Average Drawdown Average peak-to-trough decline	-3.77%	-0.36%	-3.41%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.65%	0.26%	+0.39%

Volatility

IAPR vs. CPSA - Volatility Comparison

Innovator International Developed Power Buffer ETF - April (IAPR) has a higher volatility of 2.33% compared to Calamos S&P 500 Structured Alt Protection ETF - August (CPSA) at 0.35%. This indicates that IAPR's price experiences larger fluctuations and is considered to be riskier than CPSA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IAPR	CPSA	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.33%	0.35%	+1.98%
Volatility (6M) Calculated over the trailing 6-month period	6.30%	1.71%	+4.59%
Volatility (1Y) Calculated over the trailing 1-year period	7.12%	2.13%	+4.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.94%	3.99%	+4.95%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	8.77%	3.99%	+4.78%

IAPR vs. CPSA - Expense Ratio Comparison

IAPR has a 0.85% expense ratio, which is higher than CPSA's 0.69% expense ratio.

Dividends

IAPR vs. CPSA - Dividend Comparison

Neither IAPR nor CPSA has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both IAPR and CPSA in my portfolio?

IAPR and CPSA have a correlation of 0.64, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IAPR or CPSA?

IAPR has higher volatility (2.33%) compared to CPSA (0.35%). In terms of maximum drawdown, IAPR dropped -17.73% vs CPSA's -4.72%.

Which ETF is better, IAPR or CPSA?

On 1-year performance, IAPR leads with 16.17% vs 6.52% for CPSA. On fees, CPSA is cheaper at 0.69% per year. On volatility, CPSA has been the lower-risk option at 0.35%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, IAPR or CPSA?

Over the 1-year period, IAPR has performed better with a 16.17% return vs 6.52%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, IAPR or CPSA?

CPSA is cheaper with a 0.69% expense ratio, compared with 0.85% for IAPR.

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

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

What is the main difference between IAPR and CPSA?

IAPR tracks MSCI EAFE, while CPSA tracks MerQube Cap Protect US Lrg Cap PR Index - Aug. They also come from different issuers: Innovator and Calamos. Their fees differ too: 0.85% for IAPR and 0.69% for CPSA.

Which has better risk-adjusted returns?

CPSA currently has the higher Sharpe Ratio (3.07 vs 2.28), 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.