CBOO vs. PMMY

Last updated Jun 4, 2026

CBOO (Calamos Bitcoin Structured Alt Protection ETF - October) and PMMY (PGIM S&P 500 Max Buffer ETF - May) are both Defined Outcome funds. Both are actively managed. At a 0.26 correlation, their price movements are largely independent. CBOO charges 0.69%/yr vs 0.50%/yr for PMMY.

Performance

CBOO vs. PMMY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos Bitcoin Structured Alt Protection ETF - October (CBOO) 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, CBOO achieves a -0.04% return, which is significantly lower than PMMY's 2.19% return.

CBOO

• 1D: -0.04%
• 1M: -0.00%
• YTD: -0.04%
• 6M: -0.22%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

PMMY

• 1D: -0.04%
• 1M: 0.79%
• YTD: 2.19%
• 6M: 2.74%
• 1Y: 5.98%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CBOO vs. PMMY - Yearly Performance Comparison

	2026 (YTD)	2025
CBOO Calamos Bitcoin Structured Alt Protection ETF - October	-0.04%	-1.62%
PMMY PGIM S&P 500 Max Buffer ETF - May	2.19%	1.24%

Correlation

The correlation between CBOO and PMMY is 0.26, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (All Time) Calculated using the full available price history since Oct 8, 2025	0.26

Return for Risk

CBOO vs. PMMY — Risk / Return Rank

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

PMMY

PMMY Risk / Return Rank: 98
PMMY Sharpe Ratio Rank: 98
PMMY Sortino Ratio Rank: 99
PMMY Omega Ratio Rank: 99
PMMY Calmar Ratio Rank: 98
PMMY 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.

CBOO vs. PMMY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos Bitcoin Structured Alt Protection ETF - October (CBOO) 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.

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

Sharpe Ratios by Period

	CBOO	PMMY	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	5.35	—
Sharpe Ratio (All Time) Calculated using the full available price history	-1.19	4.56	-5.75

Drawdowns

CBOO vs. PMMY - Drawdown Comparison

The maximum CBOO drawdown since its inception was -2.34%, which is greater than PMMY's maximum drawdown of -0.36%. Use the drawdown chart below to compare losses from any high point for CBOO and PMMY.

Drawdown Indicators

	CBOO	PMMY	Difference
Max Drawdown Largest peak-to-trough decline	-2.34%	-0.36%	-1.98%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.36%	—
Current Drawdown Current decline from peak	-1.72%	-0.04%	-1.68%
Average Drawdown Average peak-to-trough decline	-1.61%	-0.04%	-1.57%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.07%	—

Volatility

Volatility by Period

	CBOO	PMMY	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.36%	—
Volatility (6M) Calculated over the trailing 6-month period	—	0.87%	—
Volatility (1Y) Calculated over the trailing 1-year period	2.14%	1.12%	+1.02%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.14%	1.39%	+0.75%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.14%	1.39%	+0.75%

CBOO vs. PMMY - Expense Ratio Comparison

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

Dividends

CBOO vs. PMMY - Dividend Comparison

CBOO's dividend yield for the trailing twelve months is around 0.57%, while PMMY has not paid dividends to shareholders.

Position	TTM	2025
CBOO Calamos Bitcoin Structured Alt Protection ETF - October	0.57%	0.57%
PMMY PGIM S&P 500 Max Buffer ETF - May	0.00%	0.00%

Frequently Asked Questions

Can I hold both CBOO and PMMY in my portfolio?

CBOO and PMMY have a correlation of 0.26, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CBOO or PMMY?

On fees, PMMY is cheaper at 0.50% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CBOO or PMMY?

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

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

CBOO has the higher dividend yield at 0.57%, compared with 0.00% for PMMY.

What is the main difference between CBOO and PMMY?

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