CPRO vs. PMMY

Last updated Jun 23, 2026

CPRO (Calamos Russell 2000 Structured Alt Protection ETF - October) and PMMY (PGIM S&P 500 Max Buffer ETF - May) are both Defined Outcome funds. Both are actively managed. Over the past year, CPRO returned 13.53% vs 5.57% for PMMY. A 0.58 correlation means they provide meaningful diversification when combined. CPRO charges 0.69%/yr vs 0.50%/yr for PMMY.

Performance

CPRO vs. PMMY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos Russell 2000 Structured Alt Protection ETF - October (CPRO) and PGIM S&P 500 Max Buffer ETF - May (PMMY). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPRO achieves a 4.39% return, which is significantly higher than PMMY's 2.04% return.

CPRO

• 1D: 0.20%
• 1M: 0.95%
• YTD: 4.39%
• 6M: 4.04%
• 1Y: 13.53%
• 3Y*: —
• 5Y*: —
• 10Y*: —

PMMY

• 1D: -0.06%
• 1M: 0.06%
• YTD: 2.04%
• 6M: 2.16%
• 1Y: 5.57%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPRO vs. PMMY - Yearly Performance Comparison

	2026 (YTD)	2025
CPRO Calamos Russell 2000 Structured Alt Protection ETF - October	4.39%	9.93%
PMMY PGIM S&P 500 Max Buffer ETF - May	2.04%	4.44%

Correlation

The correlation between CPRO and PMMY is 0.59, 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	0.59
Correlation (All Time) Calculated using the full available price history since May 1, 2025	0.58

The correlation between CPRO and PMMY has been stable across timeframes, ranging from 0.58 to 0.59 - a consistent structural relationship.

Return for Risk

CPRO vs. PMMY — Risk / Return Rank

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

CPRO

CPRO Risk / Return Rank: 94
CPRO Sharpe Ratio Rank: 91
CPRO Sortino Ratio Rank: 96
CPRO Omega Ratio Rank: 94
CPRO Calmar Ratio Rank: 95
CPRO Martin Ratio Rank: 95

PMMY

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

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.

CPRO vs. PMMY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos Russell 2000 Structured Alt Protection ETF - October (CPRO) and PGIM S&P 500 Max Buffer ETF - May (PMMY). 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.

	CPRO	PMMY	Difference
Sharpe ratio: Return per unit of total volatility	3.03	4.35	-1.32
Sortino ratio: Return per unit of downside risk	5.55	6.75	-1.20
Omega ratio: Gain probability vs. loss probability	1.67	2.13	-0.46
Calmar ratio: Return relative to maximum drawdown	7.68	9.37	-1.69
Martin ratio: Return relative to average drawdown	28.45	60.97	-32.52

CPRO vs. PMMY - Sharpe Ratio Comparison

The current CPRO Sharpe Ratio is 3.03, which is lower than the PMMY Sharpe Ratio of 4.35. The chart below compares the historical Sharpe Ratios of CPRO and PMMY, 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

CPRO vs. PMMY - Drawdown Comparison

The maximum CPRO drawdown since its inception was -3.36%, which is greater than PMMY's maximum drawdown of -0.60%. Use the drawdown chart below to compare losses from any high point for CPRO and PMMY.

Drawdown Indicators

	CPRO	PMMY	Difference
Max Drawdown Largest peak-to-trough decline	-3.36%	-0.60%	-2.76%
Max Drawdown (1Y) Largest decline over 1 year	-1.77%	-0.60%	-1.17%
Current Drawdown Current decline from peak	0.00%	-0.21%	+0.21%
Average Drawdown Average peak-to-trough decline	-0.69%	-0.05%	-0.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.48%	0.09%	+0.39%

Volatility

CPRO vs. PMMY - Volatility Comparison

Calamos Russell 2000 Structured Alt Protection ETF - October (CPRO) has a higher volatility of 0.77% compared to PGIM S&P 500 Max Buffer ETF - May (PMMY) at 0.68%. This indicates that CPRO's price experiences larger fluctuations and is considered to be riskier than PMMY based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPRO	PMMY	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.77%	0.68%	+0.09%
Volatility (6M) Calculated over the trailing 6-month period	2.12%	1.08%	+1.04%
Volatility (1Y) Calculated over the trailing 1-year period	4.49%	1.29%	+3.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.13%	1.50%	+2.63%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.13%	1.50%	+2.63%

CPRO vs. PMMY - Expense Ratio Comparison

CPRO has a 0.69% expense ratio, which is higher than PMMY's 0.50% expense ratio.

Dividends

CPRO vs. PMMY - Dividend Comparison

Neither CPRO nor PMMY has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPRO and PMMY in my portfolio?

CPRO and PMMY have a correlation of 0.59, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CPRO or PMMY?

CPRO has higher volatility (0.77%) compared to PMMY (0.68%). In terms of maximum drawdown, CPRO dropped -3.36% vs PMMY's -0.60%.

Which ETF is better, CPRO or PMMY?

On 1-year performance, CPRO leads with 13.53% vs 5.57% for PMMY. On fees, PMMY 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, CPRO or PMMY?

Over the 1-year period, CPRO has performed better with a 13.53% return vs 5.57%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPRO or PMMY?

PMMY is cheaper with a 0.50% expense ratio, compared with 0.69% for CPRO.

Which ETF pays a higher dividend yield, CPRO or PMMY?

CPRO and PMMY have nearly identical dividend yields, around 0.00%.

What is the main difference between CPRO and PMMY?

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

Which has better risk-adjusted returns?

PMMY currently has the higher Sharpe Ratio (4.35 vs 3.03), 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.