CBTA vs. PMMY

Last updated Aug 4, 2026

CBTA (Calamos Bitcoin 80 Series Structured Alt Protection ETF - April) and PMMY (PGIM S&P 500 Max Buffer ETF - May) are both Defined Outcome funds. CBTA is passively managed, while PMMY is actively managed. Over the past year, CBTA returned -33.12% vs 5.25% for PMMY. Their 0.37 correlation means their historical movements had little consistent relationship. CBTA charges 0.69%/yr vs 0.50%/yr for PMMY.

Performance

CBTA vs. PMMY - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos Bitcoin 80 Series Structured Alt Protection ETF - April (CBTA) 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, CBTA achieves a -24.45% return, which is significantly lower than PMMY's 2.71% return.

CBTA

• 1D: 0.83%
• 1M: 2.26%
• 6M: -16.28%
• YTD: -24.45%
• 1Y: -33.12%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: -11.98%

PMMY

• 1D: 0.13%
• 1M: 0.54%
• 6M: 2.30%
• YTD: 2.71%
• 1Y: 5.25%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 5.75%

*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)
CBTA Calamos Bitcoin 80 Series Structured Alt Protection ETF - April	$19.28K	$37.33K	$32.42K
PMMY PGIM S&P 500 Max Buffer ETF - May	$160.95	$4.47K	$29.43K

CBTA vs. PMMY - Yearly Performance Comparison

	2026 (YTD)	2025
CBTA Calamos Bitcoin 80 Series Structured Alt Protection ETF - April	-24.45%	0.34%
PMMY PGIM S&P 500 Max Buffer ETF - May	2.71%	4.44%

Correlation

The correlation between CBTA and PMMY is 0.41, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.41
Correlation (All Time) Calculated using the full available price history since May 1, 2025	0.37

Return for Risk

CBTA vs. PMMY — Risk / Return Rank

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

CBTA

CBTA Risk / Return Rank: 2
CBTA Sharpe Ratio Rank: 1
CBTA Sortino Ratio Rank: 1
CBTA Omega Ratio Rank: 1
CBTA Calmar Ratio Rank: 2
CBTA Martin Ratio Rank: 2

PMMY

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

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.

CBTA vs. PMMY - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos Bitcoin 80 Series Structured Alt Protection ETF - April (CBTA) 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.

	CBTA	PMMY	Difference
Sharpe ratio: Return per unit of total volatility	-1.13	3.77	-4.90
Sortino ratio: Return per unit of downside risk	-1.61	5.76	-7.37
Omega ratio: Gain probability vs. loss probability	0.81	1.91	-1.10
Calmar ratio: Return relative to maximum drawdown	-0.83	8.83	-9.67
Martin ratio: Return relative to average drawdown	-1.32	46.06	-47.38

CBTA vs. PMMY - Sharpe Ratio Comparison

The current CBTA Sharpe Ratio is -1.13, which is lower than the PMMY Sharpe Ratio of 3.77. The chart below compares the historical Sharpe Ratios of CBTA 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

CBTA vs. PMMY - Drawdown Comparison

The maximum CBTA drawdown since its inception was -39.83%, which is greater than PMMY's maximum drawdown of -0.60%. Use the drawdown chart below to compare losses from any high point for CBTA and PMMY.

Drawdown Indicators

	CBTA	PMMY	Difference
Max Drawdown Largest peak-to-trough decline	-39.83%	-0.60%	-39.23%
Max Drawdown (1Y) Largest decline over 1 year	-39.83%	-0.60%	-39.23%
Current Drawdown Current decline from peak	-36.91%	0.00%	-36.91%
Average Drawdown Average peak-to-trough decline	-15.96%	-0.06%	-15.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	25.05%	0.11%	+24.94%

Volatility

CBTA vs. PMMY - Volatility Comparison

Calamos Bitcoin 80 Series Structured Alt Protection ETF - April (CBTA) has a higher volatility of 4.88% compared to PGIM S&P 500 Max Buffer ETF - May (PMMY) at 0.59%. This indicates that CBTA'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

	CBTA	PMMY	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.88%	0.59%	+4.29%
Volatility (6M) Calculated over the trailing 6-month period	21.40%	1.20%	+20.20%
Volatility (1Y) Calculated over the trailing 1-year period	29.44%	1.40%	+28.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.78%	1.54%	+25.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	26.78%	1.54%	+25.24%

CBTA vs. PMMY - Expense Ratio Comparison

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

Dividends

CBTA vs. PMMY - Dividend Comparison

CBTA's dividend yield for the trailing twelve months is around 1.18%, while PMMY has not paid dividends to shareholders.

Position	TTM	2025
CBTA Calamos Bitcoin 80 Series Structured Alt Protection ETF - April	1.18%	0.89%
PMMY PGIM S&P 500 Max Buffer ETF - May	0.00%	0.00%

Frequently Asked Questions

Can I hold both CBTA and PMMY in my portfolio?

CBTA and PMMY have a correlation of 0.41, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, CBTA or PMMY?

CBTA has higher volatility (4.88%) compared to PMMY (0.59%). In terms of maximum drawdown, CBTA dropped -39.83% vs PMMY's -0.60%.

Which ETF is better, CBTA or PMMY?

On 1-year performance, PMMY leads with 5.25% vs -33.12% for CBTA. On fees, PMMY is cheaper at 0.50% per year. On volatility, PMMY has been the lower-risk option at 0.59%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CBTA or PMMY?

Over the 1-year period, PMMY has performed better with a 5.25% return vs -33.12%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CBTA or PMMY?

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

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

CBTA has the higher dividend yield at 1.18%, compared with 0.00% for PMMY.

What is the main difference between CBTA and PMMY?

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

Which has better risk-adjusted returns?

PMMY currently has the higher Sharpe Ratio (3.77 vs -1.13), 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.