CPSN vs. FBUF

Last updated Jun 25, 2026

CPSN (Calamos S&P 500 Structured Alt Protection ETF - November) and FBUF (Fidelity Dynamic Buffered Equity ETF) are both Defined Outcome funds. Both are actively managed. Over the past year, CPSN returned 6.22% vs 15.31% for FBUF. Their correlation of 0.82 suggests significant overlap in exposure. CPSN charges 0.69%/yr vs 0.48%/yr for FBUF.

Performance

CPSN vs. FBUF - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Calamos S&P 500 Structured Alt Protection ETF - November (CPSN) and Fidelity Dynamic Buffered Equity ETF (FBUF). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, CPSN achieves a 2.46% return, which is significantly lower than FBUF's 3.45% return.

CPSN

• 1D: -0.09%
• 1M: 0.04%
• YTD: 2.46%
• 6M: 2.35%
• 1Y: 6.22%
• 3Y*: —
• 5Y*: —
• 10Y*: —

FBUF

• 1D: -0.16%
• 1M: -0.95%
• YTD: 3.45%
• 6M: 2.70%
• 1Y: 15.31%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

CPSN vs. FBUF - Yearly Performance Comparison

	2026 (YTD)	2025	2024
CPSN Calamos S&P 500 Structured Alt Protection ETF - November	2.46%	6.38%	0.57%
FBUF Fidelity Dynamic Buffered Equity ETF	3.45%	14.01%	2.82%

Correlation

The correlation between CPSN and FBUF 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 (1Y) Calculated over the trailing 1-year period	0.79
Correlation (All Time) Calculated using the full available price history since Nov 1, 2024	0.82

The correlation between CPSN and FBUF has been stable across timeframes, ranging from 0.79 to 0.82 - a consistent structural relationship.

Return for Risk

CPSN vs. FBUF — Risk / Return Rank

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

CPSN

CPSN Risk / Return Rank: 92
CPSN Sharpe Ratio Rank: 94
CPSN Sortino Ratio Rank: 96
CPSN Omega Ratio Rank: 95
CPSN Calmar Ratio Rank: 82
CPSN Martin Ratio Rank: 93

FBUF

FBUF Risk / Return Rank: 66
FBUF Sharpe Ratio Rank: 66
FBUF Sortino Ratio Rank: 62
FBUF Omega Ratio Rank: 72
FBUF Calmar Ratio Rank: 62
FBUF Martin Ratio Rank: 70

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.

CPSN vs. FBUF - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - November (CPSN) and Fidelity Dynamic Buffered Equity ETF (FBUF). 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.

	CPSN	FBUF	Difference
Sharpe ratio: Return per unit of total volatility	3.02	1.91	+1.11
Sortino ratio: Return per unit of downside risk	4.84	2.56	+2.28
Omega ratio: Gain probability vs. loss probability	1.65	1.38	+0.27
Calmar ratio: Return relative to maximum drawdown	3.83	2.74	+1.10
Martin ratio: Return relative to average drawdown	20.69	11.64	+9.05

CPSN vs. FBUF - Sharpe Ratio Comparison

The current CPSN Sharpe Ratio is 3.02, which is higher than the FBUF Sharpe Ratio of 1.91. The chart below compares the historical Sharpe Ratios of CPSN and FBUF, 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

CPSN vs. FBUF - Drawdown Comparison

The maximum CPSN drawdown since its inception was -3.23%, smaller than the maximum FBUF drawdown of -11.09%. Use the drawdown chart below to compare losses from any high point for CPSN and FBUF.

Drawdown Indicators

	CPSN	FBUF	Difference
Max Drawdown Largest peak-to-trough decline	-3.23%	-11.09%	+7.86%
Max Drawdown (1Y) Largest decline over 1 year	-1.63%	-5.61%	+3.98%
Current Drawdown Current decline from peak	-0.40%	-1.99%	+1.59%
Average Drawdown Average peak-to-trough decline	-0.31%	-1.38%	+1.07%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.30%	1.32%	-1.02%

Volatility

CPSN vs. FBUF - Volatility Comparison

The current volatility for Calamos S&P 500 Structured Alt Protection ETF - November (CPSN) is 0.67%, while Fidelity Dynamic Buffered Equity ETF (FBUF) has a volatility of 3.41%. This indicates that CPSN experiences smaller price fluctuations and is considered to be less risky than FBUF based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	CPSN	FBUF	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.67%	3.41%	-2.74%
Volatility (6M) Calculated over the trailing 6-month period	1.75%	6.09%	-4.34%
Volatility (1Y) Calculated over the trailing 1-year period	2.10%	8.09%	-5.99%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.09%	9.68%	-6.59%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.09%	9.68%	-6.59%

CPSN vs. FBUF - Expense Ratio Comparison

CPSN has a 0.69% expense ratio, which is higher than FBUF's 0.48% expense ratio.

Dividends

CPSN vs. FBUF - Dividend Comparison

CPSN has not paid dividends to shareholders, while FBUF's dividend yield for the trailing twelve months is around 0.60%.

Position	TTM	2025	2024
CPSN Calamos S&P 500 Structured Alt Protection ETF - November	0.00%	0.00%	0.00%
FBUF Fidelity Dynamic Buffered Equity ETF	0.60%	0.64%	0.54%

Frequently Asked Questions

Can I hold both CPSN and FBUF in my portfolio?

CPSN and FBUF 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 is riskier, CPSN or FBUF?

FBUF has higher volatility (3.41%) compared to CPSN (0.67%). In terms of maximum drawdown, CPSN dropped -3.23% vs FBUF's -11.09%.

Which ETF is better, CPSN or FBUF?

On 1-year performance, FBUF leads with 15.31% vs 6.22% for CPSN. On fees, FBUF is cheaper at 0.48% per year. On volatility, CPSN has been the lower-risk option at 0.67%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, CPSN or FBUF?

Over the 1-year period, FBUF has performed better with a 15.31% return vs 6.22%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, CPSN or FBUF?

FBUF is cheaper with a 0.48% expense ratio, compared with 0.69% for CPSN.

Which ETF pays a higher dividend yield, CPSN or FBUF?

FBUF has the higher dividend yield at 0.60%, compared with 0.00% for CPSN.

What is the main difference between CPSN and FBUF?

They also come from different issuers: Calamos and Fidelity. Their fees differ too: 0.69% for CPSN and 0.48% for FBUF.

Which has better risk-adjusted returns?

CPSN currently has the higher Sharpe Ratio (3.02 vs 1.91), 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.