CPST vs. PMAP

Last updated Jun 3, 2026

CPST (Calamos S&P 500 Structured Alt Protection ETF - September) and PMAP (PGIM S&P 500 Max Buffer ETF - April) are both Defined Outcome funds. CPST is passively managed, while PMAP is actively managed. Over the past year, CPST returned 7.84% vs 7.53% for PMAP. A 0.76 correlation means they provide meaningful diversification when combined. CPST charges 0.69%/yr vs 0.50%/yr for PMAP.

Performance

CPST vs. PMAP - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos S&P 500 Structured Alt Protection ETF - September (CPST) and PGIM S&P 500 Max Buffer ETF - April (PMAP). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPST achieves a 2.67% return, which is significantly lower than PMAP's 3.34% return.

CPST

• 1D: 0.07%
• 1M: 0.82%
• YTD: 2.67%
• 6M: 3.20%
• 1Y: 7.84%
• 3Y*: —
• 5Y*: —
• 10Y*: —

PMAP

• 1D: 0.04%
• 1M: 0.50%
• YTD: 3.34%
• 6M: 3.93%
• 1Y: 7.53%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPST vs. PMAP - Yearly Performance Comparison

	2026 (YTD)	2025
CPST Calamos S&P 500 Structured Alt Protection ETF - September	2.67%	7.19%
PMAP PGIM S&P 500 Max Buffer ETF - April	3.34%	5.37%

Correlation

The correlation between CPST and PMAP is 0.76, 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	0.76
Correlation (All Time) Calculated using the full available price history since Apr 2, 2025	0.76

The correlation between CPST and PMAP has been stable across timeframes, ranging from 0.76 to 0.76 - a consistent structural relationship.

Return for Risk

CPST vs. PMAP — Risk / Return Rank

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

CPST

CPST Risk / Return Rank: 94
CPST Sharpe Ratio Rank: 94
CPST Sortino Ratio Rank: 97
CPST Omega Ratio Rank: 96
CPST Calmar Ratio Rank: 90
CPST Martin Ratio Rank: 95

PMAP

PMAP Risk / Return Rank: 99
PMAP Sharpe Ratio Rank: 99
PMAP Sortino Ratio Rank: 99
PMAP Omega Ratio Rank: 99
PMAP Calmar Ratio Rank: 99
PMAP Martin Ratio Rank: 99

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.

CPST vs. PMAP - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - September (CPST) and PGIM S&P 500 Max Buffer ETF - April (PMAP). 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.

	CPST	PMAP	Difference
Sharpe ratio Return per unit of total volatility	3.66	6.59	-2.93
Sortino ratio Return per unit of downside risk	6.09	13.80	-7.71
Omega ratio Gain probability vs. loss probability	1.84	3.00	-1.15
Calmar ratio Return relative to maximum drawdown	5.58	21.97	-16.39
Martin ratio Return relative to average drawdown	30.14	138.08	-107.94
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

CPST vs. PMAP - Sharpe Ratio Comparison

The current CPST Sharpe Ratio is 3.66, which is lower than the PMAP Sharpe Ratio of 6.59. The chart below compares the historical Sharpe Ratios of CPST and PMAP, 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

	CPST	PMAP	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	3.66	6.59	-2.93
Sharpe Ratio (All Time) Calculated using the full available price history	2.02	3.26	-1.24

Drawdowns

CPST vs. PMAP - Drawdown Comparison

The maximum CPST drawdown since its inception was -3.79%, which is greater than PMAP's maximum drawdown of -1.75%. Use the drawdown chart below to compare losses from any high point for CPST and PMAP.

Drawdown Indicators

	CPST	PMAP	Difference
Max Drawdown Largest peak-to-trough decline	-3.79%	-1.75%	-2.04%
Max Drawdown (1Y) Largest decline over 1 year	-1.42%	-0.34%	-1.08%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-0.35%	-0.08%	-0.27%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.26%	0.05%	+0.21%

Volatility

CPST vs. PMAP - Volatility Comparison

Calamos S&P 500 Structured Alt Protection ETF - September (CPST) and PGIM S&P 500 Max Buffer ETF - April (PMAP) have volatilities of 0.32% and 0.31%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPST	PMAP	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.32%	0.31%	+0.01%
Volatility (6M) Calculated over the trailing 6-month period	1.60%	0.80%	+0.80%
Volatility (1Y) Calculated over the trailing 1-year period	2.15%	1.15%	+1.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.37%	2.33%	+1.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.37%	2.33%	+1.04%

CPST vs. PMAP - Expense Ratio Comparison

CPST has a 0.69% expense ratio, which is higher than PMAP's 0.50% expense ratio.

Dividends

CPST vs. PMAP - Dividend Comparison

Neither CPST nor PMAP has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPST and PMAP in my portfolio?

CPST and PMAP have a correlation of 0.76, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPST or PMAP?

CPST has higher volatility (0.32%) compared to PMAP (0.31%). In terms of maximum drawdown, CPST dropped -3.79% vs PMAP's -1.75%.

Which ETF is better, CPST or PMAP?

On 1-year performance, CPST leads with 7.84% vs 7.53% for PMAP. On fees, PMAP is cheaper at 0.50% per year. 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, CPST or PMAP?

Over the 1-year period, CPST has performed better with a 7.84% return vs 7.53%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPST or PMAP?

PMAP is cheaper with a 0.50% expense ratio, compared with 0.69% for CPST.

Which ETF pays a higher dividend yield, CPST or PMAP?

CPST and PMAP have nearly identical dividend yields, around 0.00%.

What is the main difference between CPST and PMAP?

They also come from different issuers: Calamos and PGIM. Their fees differ too: 0.69% for CPST and 0.50% for PMAP.

Which has better risk-adjusted returns?

PMAP currently has the higher Sharpe Ratio (6.59 vs 3.66), 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.