CPNM vs. OCTB

Last updated Jun 4, 2026

CPNM (Calamos Nasdaq-100 Structured Alt Protection ETF - March) and OCTB (Aptus October Buffer ETF) are both Defined Outcome funds. CPNM is passively managed, while OCTB is actively managed. A 0.79 correlation means they provide meaningful diversification when combined. CPNM charges 0.69%/yr vs 0.25%/yr for OCTB.

Performance

CPNM vs. OCTB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos Nasdaq-100 Structured Alt Protection ETF - March (CPNM) and Aptus October Buffer ETF (OCTB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPNM achieves a 2.97% return, which is significantly lower than OCTB's 6.18% return.

CPNM

• 1D: -0.03%
• 1M: 0.81%
• YTD: 2.97%
• 6M: 3.58%
• 1Y: 8.01%
• 3Y*: —
• 5Y*: —
• 10Y*: —

OCTB

• 1D: -0.17%
• 1M: 2.41%
• YTD: 6.18%
• 6M: 6.75%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPNM vs. OCTB - Yearly Performance Comparison

	2026 (YTD)	2025
CPNM Calamos Nasdaq-100 Structured Alt Protection ETF - March	2.97%	1.62%
OCTB Aptus October Buffer ETF	6.18%	2.37%

Correlation

The correlation between CPNM and OCTB is 0.79, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (All Time) Calculated using the full available price history since Oct 15, 2025	0.79

Return for Risk

CPNM vs. OCTB — Risk / Return Rank

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

CPNM

CPNM Risk / Return Rank: 97
CPNM Sharpe Ratio Rank: 96
CPNM Sortino Ratio Rank: 98
CPNM Omega Ratio Rank: 97
CPNM Calmar Ratio Rank: 95
CPNM Martin Ratio Rank: 97

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.

CPNM vs. OCTB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos Nasdaq-100 Structured Alt Protection ETF - March (CPNM) and Aptus October Buffer ETF (OCTB). 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.

	CPNM	OCTB	Difference
Sharpe ratio: Return per unit of total volatility	4.18	—	—
Sortino ratio: Return per unit of downside risk	7.02	—	—
Omega ratio: Gain probability vs. loss probability	1.95	—	—
Calmar ratio: Return relative to maximum drawdown	7.80	—	—
Martin ratio: Return relative to average drawdown	43.66	—	—
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

	CPNM	OCTB	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	4.18	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	2.77	1.97	+0.80

Drawdowns

CPNM vs. OCTB - Drawdown Comparison

The maximum CPNM drawdown since its inception was -1.91%, smaller than the maximum OCTB drawdown of -4.79%. Use the drawdown chart below to compare losses from any high point for CPNM and OCTB.

Drawdown Indicators

	CPNM	OCTB	Difference
Max Drawdown Largest peak-to-trough decline	-1.91%	-4.79%	+2.88%
Max Drawdown (1Y) Largest decline over 1 year	-1.03%	—	—
Current Drawdown Current decline from peak	-0.03%	-0.17%	+0.14%
Average Drawdown Average peak-to-trough decline	-0.18%	-0.70%	+0.52%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.18%	—	—

Volatility

Volatility by Period

	CPNM	OCTB	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.51%	—	—
Volatility (6M) Calculated over the trailing 6-month period	1.36%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	1.93%	7.20%	-5.27%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	2.81%	7.20%	-4.39%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.81%	7.20%	-4.39%

CPNM vs. OCTB - Expense Ratio Comparison

CPNM has a 0.69% expense ratio, which is higher than OCTB's 0.25% expense ratio.

Dividends

CPNM vs. OCTB - Dividend Comparison

Neither CPNM nor OCTB has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both CPNM and OCTB in my portfolio?

CPNM and OCTB have a correlation of 0.79, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, CPNM or OCTB?

On fees, OCTB 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, CPNM or OCTB?

OCTB is cheaper with a 0.25% expense ratio, compared with 0.69% for CPNM.

Which ETF pays a higher dividend yield, CPNM or OCTB?

CPNM and OCTB have nearly identical dividend yields, around 0.00%.

What is the main difference between CPNM and OCTB?

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