CPSR vs. CPSA

Last updated Jun 6, 2026

CPSR (Calamos S&P 500 Structured Alt Protection ETF - March) and CPSA (Calamos S&P 500 Structured Alt Protection ETF - August) are both Defined Outcome funds from Calamos - CPSR tracks the S&P 500 Index Price Return while CPSA tracks the MerQube Cap Protect US Lrg Cap PR Index - Aug. Both are passively managed. Over the past year, CPSR returned 7.24% vs 8.07% for CPSA. A 0.77 correlation means they provide meaningful diversification when combined. Both charge a 0.69% expense ratio.

Performance

CPSR vs. CPSA - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos S&P 500 Structured Alt Protection ETF - March (CPSR) 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, CPSR achieves a 2.30% return, which is significantly lower than CPSA's 2.69% return.

CPSR

• 1D: -0.16%
• 1M: 0.10%
• YTD: 2.30%
• 6M: 2.77%
• 1Y: 7.24%
• 3Y*: —
• 5Y*: —
• 10Y*: —

CPSA

• 1D: -0.13%
• 1M: 0.43%
• YTD: 2.69%
• 6M: 3.02%
• 1Y: 8.07%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPSR vs. CPSA - Yearly Performance Comparison

	2026 (YTD)	2025
CPSR Calamos S&P 500 Structured Alt Protection ETF - March	2.30%	6.17%
CPSA Calamos S&P 500 Structured Alt Protection ETF - August	2.69%	7.09%

Correlation

The correlation between CPSR and CPSA is 0.72, 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	0.72
Correlation (All Time) Calculated using the full available price history since Mar 4, 2025	0.77

The correlation between CPSR and CPSA has been stable across timeframes, ranging from 0.72 to 0.77 - a consistent structural relationship.

Return for Risk

CPSR vs. CPSA — Risk / Return Rank

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

CPSR

CPSR Risk / Return Rank: 96
CPSR Sharpe Ratio Rank: 96
CPSR Sortino Ratio Rank: 98
CPSR Omega Ratio Rank: 97
CPSR Calmar Ratio Rank: 94
CPSR Martin Ratio Rank: 96

CPSA

CPSA Risk / Return Rank: 95
CPSA Sharpe Ratio Rank: 95
CPSA Sortino Ratio Rank: 97
CPSA Omega Ratio Rank: 96
CPSA Calmar Ratio Rank: 91
CPSA Martin Ratio Rank: 96

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.

CPSR vs. CPSA - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - March (CPSR) 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.

	CPSR	CPSA	Difference
Sharpe ratio: Return per unit of total volatility	3.99	3.51	+0.48
Sortino ratio: Return per unit of downside risk	6.66	5.78	+0.88
Omega ratio: Gain probability vs. loss probability	1.92	1.78	+0.14
Calmar ratio: Return relative to maximum drawdown	6.50	5.50	+1.00
Martin ratio: Return relative to average drawdown	31.57	31.22	+0.35
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CPSR vs. CPSA - Sharpe Ratio Comparison

The current CPSR Sharpe Ratio is 3.99, which is comparable to the CPSA Sharpe Ratio of 3.51. The chart below compares the historical Sharpe Ratios of CPSR 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.

Sharpe Ratios by Period

	CPSR	CPSA	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.99	3.51	+0.48
Sharpe Ratio (All Time) Calculated using the full available price history	1.73	1.82	-0.09

Drawdowns

CPSR vs. CPSA - Drawdown Comparison

The maximum CPSR drawdown since its inception was -3.40%, smaller than the maximum CPSA drawdown of -4.72%. Use the drawdown chart below to compare losses from any high point for CPSR and CPSA.

Drawdown Indicators

	CPSR	CPSA	Difference
Max Drawdown Largest peak-to-trough decline	-3.40%	-4.72%	+1.32%
Max Drawdown (1Y) Largest decline over 1 year	-1.12%	-1.47%	+0.35%
Current Drawdown Current decline from peak	-0.23%	-0.13%	-0.10%
Average Drawdown Average peak-to-trough decline	-0.38%	-0.38%	0.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.23%	0.26%	-0.03%

Volatility

CPSR vs. CPSA - Volatility Comparison

The current volatility for Calamos S&P 500 Structured Alt Protection ETF - March (CPSR) is 0.31%, while Calamos S&P 500 Structured Alt Protection ETF - August (CPSA) has a volatility of 0.38%. This indicates that CPSR experiences smaller price fluctuations and is considered to be less risky than CPSA based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPSR	CPSA	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.31%	0.38%	-0.07%
Volatility (6M) Calculated over the trailing 6-month period	1.30%	1.72%	-0.42%
Volatility (1Y) Calculated over the trailing 1-year period	1.83%	2.31%	-0.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.93%	4.13%	-0.20%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.93%	4.13%	-0.20%

CPSR vs. CPSA - Expense Ratio Comparison

Both CPSR and CPSA have an expense ratio of 0.69%.

Dividends

CPSR vs. CPSA - Dividend Comparison

Neither CPSR nor CPSA has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPSR and CPSA in my portfolio?

CPSR and CPSA have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPSR or CPSA?

CPSA has higher volatility (0.38%) compared to CPSR (0.31%). In terms of maximum drawdown, CPSR dropped -3.40% vs CPSA's -4.72%.

Which ETF is better, CPSR or CPSA?

On 1-year performance, CPSA leads with 8.07% vs 7.24% for CPSR. Both ETFs have the same 0.69% expense ratio. Their volatility is very similar. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CPSR or CPSA?

Over the 1-year period, CPSA has performed better with a 8.07% return vs 7.24%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPSR or CPSA?

CPSR and CPSA have the same expense ratio: 0.69% per year.

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

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

What is the main difference between CPSR and CPSA?

CPSR tracks S&P 500 Index Price Return, while CPSA tracks MerQube Cap Protect US Lrg Cap PR Index - Aug.

Which has better risk-adjusted returns?

CPSR currently has the higher Sharpe Ratio (3.99 vs 3.51), 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.