BUFX vs. CPSP

Last updated Jun 4, 2026

BUFX (FT Vest Laddered Enhance & Moderate Buffer ETF) and CPSP (Calamos S&P 500 Structured Alt Protection ETF - April) are both exchange-traded funds - BUFX is a Defined Outcome fund managed by First Trust, while CPSP is a S&P 500 fund actively managed by Calamos. A 0.72 correlation means they provide meaningful diversification when combined. BUFX charges 0.96%/yr vs 0.69%/yr for CPSP.

Performance

BUFX vs. CPSP - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in FT Vest Laddered Enhance & Moderate Buffer ETF (BUFX) and Calamos S&P 500 Structured Alt Protection ETF - April (CPSP). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, BUFX achieves a 4.10% return, which is significantly higher than CPSP's 3.18% return.

BUFX

• 1D: -0.05%
• 1M: 1.35%
• YTD: 4.10%
• 6M: 4.88%
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

CPSP

• 1D: 0.00%
• 1M: 0.60%
• YTD: 3.18%
• 6M: 3.74%
• 1Y: 7.13%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

BUFX vs. CPSP - Yearly Performance Comparison

	2026 (YTD)	2025
BUFX FT Vest Laddered Enhance & Moderate Buffer ETF	4.10%	5.62%
CPSP Calamos S&P 500 Structured Alt Protection ETF - April	3.18%	3.25%

Correlation

The correlation between BUFX and CPSP is 0.72, 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 Jun 26, 2025	0.72

Return for Risk

BUFX vs. CPSP — Risk / Return Rank

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

CPSP

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

BUFX vs. CPSP - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for FT Vest Laddered Enhance & Moderate Buffer ETF (BUFX) and Calamos S&P 500 Structured Alt Protection ETF - April (CPSP). 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

	BUFX	CPSP	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	—	5.08	—
Sharpe Ratio (All Time) Calculated using the full available price history	2.68	3.17	-0.49

Drawdowns

BUFX vs. CPSP - Drawdown Comparison

The maximum BUFX drawdown since its inception was -2.87%, which is greater than CPSP's maximum drawdown of -1.73%. Use the drawdown chart below to compare losses from any high point for BUFX and CPSP.

Drawdown Indicators

	BUFX	CPSP	Difference
Max Drawdown Largest peak-to-trough decline	-2.87%	-1.73%	-1.14%
Max Drawdown (1Y) Largest decline over 1 year	—	-0.37%	—
Current Drawdown Current decline from peak	-0.07%	0.00%	-0.07%
Average Drawdown Average peak-to-trough decline	-0.24%	-0.08%	-0.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	—	0.07%	—

Volatility

Volatility by Period

	BUFX	CPSP	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	0.32%	—
Volatility (6M) Calculated over the trailing 6-month period	—	0.84%	—
Volatility (1Y) Calculated over the trailing 1-year period	3.98%	1.42%	+2.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.98%	2.37%	+1.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	3.98%	2.37%	+1.61%

BUFX vs. CPSP - Expense Ratio Comparison

BUFX has a 0.96% expense ratio, which is higher than CPSP's 0.69% expense ratio.

Dividends

BUFX vs. CPSP - Dividend Comparison

Neither BUFX nor CPSP has paid dividends to shareholders.

Tickers have no history of dividend payments

Frequently Asked Questions

Can I hold both BUFX and CPSP in my portfolio?

BUFX and CPSP have a correlation of 0.72, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which ETF is better, BUFX or CPSP?

On fees, CPSP is cheaper at 0.69% per year. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF is cheaper, BUFX or CPSP?

CPSP is cheaper with a 0.69% expense ratio, compared with 0.96% for BUFX.

Which ETF pays a higher dividend yield, BUFX or CPSP?

BUFX and CPSP have nearly identical dividend yields, around 0.00%.

What is the main difference between BUFX and CPSP?

BUFX is categorized as Defined Outcome, while CPSP is S&P 500. They also come from different issuers: First Trust and Calamos. Their fees differ too: 0.96% for BUFX and 0.69% for CPSP.