CBTA vs. APRB

Last updated Jun 4, 2026

CBTA (Calamos Bitcoin 80 Series Structured Alt Protection ETF - April) and APRB (Aptus April Buffer ETF) are both Defined Outcome funds. CBTA is passively managed, while APRB is actively managed. At a 0.49 correlation, their price movements are largely independent. CBTA charges 0.69%/yr vs 0.25%/yr for APRB.

Performance

CBTA vs. APRB - 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 Aptus April Buffer ETF (APRB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CBTA achieves a -23.76% return, which is significantly lower than APRB's 4.77% return.

CBTA

• 1D: -1.31%
• 1M: -9.26%
• YTD: -23.76%
• 6M: -26.89%
• 1Y: -28.38%
• 3Y*: —
• 5Y*: —
• 10Y*: —

APRB

• 1D: -0.11%
• 1M: 1.69%
• YTD: 4.77%
• 6M: 5.32%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CBTA vs. APRB - Yearly Performance Comparison

	2026 (YTD)	2025
CBTA Calamos Bitcoin 80 Series Structured Alt Protection ETF - April	-23.76%	-12.98%
APRB Aptus April Buffer ETF	4.77%	2.48%

Correlation

The correlation between CBTA and APRB is 0.49, 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 15, 2025	0.49

Return for Risk

CBTA vs. APRB — Risk / Return Rank

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

CBTA

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

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.

CBTA vs. APRB - 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 Aptus April Buffer ETF (APRB). 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.

	CBTA	APRB	Difference
Sharpe ratio: Return per unit of total volatility	-0.98	—	—
Sortino ratio: Return per unit of downside risk	-1.33	—	—
Omega ratio: Gain probability vs. loss probability	0.84	—	—
Calmar ratio: Return relative to maximum drawdown	-0.78	—	—
Martin ratio: Return relative to average drawdown	-1.42	—	—
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

Sharpe Ratios by Period

	CBTA	APRB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.98	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	-0.47	2.00	-2.47

Drawdowns

CBTA vs. APRB - Drawdown Comparison

The maximum CBTA drawdown since its inception was -36.74%, which is greater than APRB's maximum drawdown of -4.59%. Use the drawdown chart below to compare losses from any high point for CBTA and APRB.

Drawdown Indicators

	CBTA	APRB	Difference
Max Drawdown Largest peak-to-trough decline	-36.74%	-4.59%	-32.15%
Max Drawdown (1Y) Largest decline over 1 year	-36.74%	—	—
Current Drawdown Current decline from peak	-36.33%	-0.11%	-36.22%
Average Drawdown Average peak-to-trough decline	-12.99%	-0.74%	-12.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	20.01%	—	—

Volatility

Volatility by Period

	CBTA	APRB	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.51%	—	—
Volatility (6M) Calculated over the trailing 6-month period	24.83%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	28.99%	5.98%	+23.01%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.68%	5.98%	+21.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	27.68%	5.98%	+21.70%

CBTA vs. APRB - Expense Ratio Comparison

CBTA has a 0.69% expense ratio, which is higher than APRB's 0.25% expense ratio.

Dividends

CBTA vs. APRB - Dividend Comparison

CBTA's dividend yield for the trailing twelve months is around 1.17%, while APRB has not paid dividends to shareholders.

Position	TTM	2025
APRB Aptus April Buffer ETF	0.00%	0.00%
CBTA Calamos Bitcoin 80 Series Structured Alt Protection ETF - April	1.17%	0.89%

Frequently Asked Questions

Can I hold both CBTA and APRB in my portfolio?

CBTA and APRB have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CBTA or APRB?

On fees, APRB is cheaper at 0.25% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, CBTA or APRB?

APRB is cheaper with a 0.25% expense ratio, compared with 0.69% for CBTA.

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

CBTA has the higher dividend yield at 1.17%, compared with 0.00% for APRB.

What is the main difference between CBTA and APRB?

They also come from different issuers: Calamos and Aptus Capital Advisors. Their fees differ too: 0.69% for CBTA and 0.25% for APRB.