VOO vs. CPSP

Last updated Jun 4, 2026

VOO (Vanguard S&P 500 ETF) and CPSP (Calamos S&P 500 Structured Alt Protection ETF - April) are both S&P 500 funds. VOO is passively managed, while CPSP is actively managed. Over the past year, VOO returned 28.04% vs 7.13% for CPSP. A 0.76 correlation means they provide meaningful diversification when combined. VOO charges 0.03%/yr vs 0.69%/yr for CPSP.

Performance

VOO vs. CPSP - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Vanguard S&P 500 ETF (VOO) 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, VOO achieves a 10.91% return, which is significantly higher than CPSP's 3.18% return.

VOO

• 1D: -0.70%
• 1M: 5.04%
• YTD: 10.91%
• 6M: 10.93%
• 1Y: 28.04%
• 3Y*: 22.44%
• 5Y*: 13.90%
• 10Y*: 15.56%

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)

VOO vs. CPSP - Yearly Performance Comparison

	2026 (YTD)	2025
VOO Vanguard S&P 500 ETF	10.91%	22.65%
CPSP Calamos S&P 500 Structured Alt Protection ETF - April	3.18%	5.46%

Correlation

The correlation between VOO and CPSP is 0.75, 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	0.75
Correlation (All Time) Calculated using the full available price history since Apr 2, 2025	0.76

The correlation between VOO and CPSP has been stable across timeframes, ranging from 0.75 to 0.76 - a consistent structural relationship.

Return for Risk

VOO vs. CPSP — Risk / Return Rank

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

VOO

VOO Risk / Return Rank: 70
VOO Sharpe Ratio Rank: 71
VOO Sortino Ratio Rank: 70
VOO Omega Ratio Rank: 70
VOO Calmar Ratio Rank: 62
VOO Martin Ratio Rank: 75

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.

VOO vs. CPSP - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Vanguard S&P 500 ETF (VOO) 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.

	VOO	CPSP	Difference
Sharpe ratio: Return per unit of total volatility	2.39	5.08	-2.69
Sortino ratio: Return per unit of downside risk	3.25	9.15	-5.89
Omega ratio: Gain probability vs. loss probability	1.43	2.31	-0.88
Calmar ratio: Return relative to maximum drawdown	3.16	19.11	-15.94
Martin ratio: Return relative to average drawdown	14.73	96.35	-81.62
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

VOO vs. CPSP - Sharpe Ratio Comparison

The current VOO Sharpe Ratio is 2.39, which is lower than the CPSP Sharpe Ratio of 5.08. The chart below compares the historical Sharpe Ratios of VOO and CPSP, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	VOO	CPSP	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.39	5.08	-2.69
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.83	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.87	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.89	3.17	-2.28

Drawdowns

VOO vs. CPSP - Drawdown Comparison

The maximum VOO drawdown since its inception was -33.99%, which is greater than CPSP's maximum drawdown of -1.73%. Use the drawdown chart below to compare losses from any high point for VOO and CPSP.

Drawdown Indicators

	VOO	CPSP	Difference
Max Drawdown Largest peak-to-trough decline	-33.99%	-1.73%	-32.26%
Max Drawdown (1Y) Largest decline over 1 year	-8.90%	-0.37%	-8.53%
Max Drawdown (3Y) Largest decline over 3 years	-18.69%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-24.52%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-33.99%	—	—
Current Drawdown Current decline from peak	-0.70%	0.00%	-0.70%
Average Drawdown Average peak-to-trough decline	-3.69%	-0.08%	-3.61%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.91%	0.07%	+1.84%

Volatility

VOO vs. CPSP - Volatility Comparison

Vanguard S&P 500 ETF (VOO) has a higher volatility of 2.84% compared to Calamos S&P 500 Structured Alt Protection ETF - April (CPSP) at 0.32%. This indicates that VOO's price experiences larger fluctuations and is considered to be riskier than CPSP based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	VOO	CPSP	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.84%	0.32%	+2.52%
Volatility (6M) Calculated over the trailing 6-month period	8.90%	0.84%	+8.06%
Volatility (1Y) Calculated over the trailing 1-year period	11.80%	1.42%	+10.38%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	16.81%	2.37%	+14.44%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.01%	2.37%	+15.64%

VOO vs. CPSP - Expense Ratio Comparison

VOO has a 0.03% expense ratio, which is lower than CPSP's 0.69% expense ratio.

Dividends

VOO vs. CPSP - Dividend Comparison

VOO's dividend yield for the trailing twelve months is around 1.03%, while CPSP has not paid dividends to shareholders.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
CPSP Calamos S&P 500 Structured Alt Protection ETF - April	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
VOO Vanguard S&P 500 ETF	1.03%	1.13%	1.24%	1.46%	1.69%	1.25%	1.54%	1.88%	2.06%	1.78%	2.02%	2.10%

Frequently Asked Questions

Can I hold both VOO and CPSP in my portfolio?

VOO and CPSP have a correlation of 0.75, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, VOO or CPSP?

VOO has higher volatility (2.84%) compared to CPSP (0.32%). In terms of maximum drawdown, VOO dropped -33.99% vs CPSP's -1.73%.

Which ETF is better, VOO or CPSP?

On 1-year performance, VOO leads with 28.04% vs 7.13% for CPSP. On fees, VOO is cheaper at 0.03% per year. On volatility, CPSP has been the lower-risk option at 0.32%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, VOO or CPSP?

Over the 1-year period, VOO has performed better with a 28.04% return vs 7.13%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, VOO or CPSP?

VOO is cheaper with a 0.03% expense ratio, compared with 0.69% for CPSP.

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

VOO has the higher dividend yield at 1.03%, compared with 0.00% for CPSP.

What is the main difference between VOO and CPSP?

They also come from different issuers: Vanguard and Calamos. Their fees differ too: 0.03% for VOO and 0.69% for CPSP.

Which has better risk-adjusted returns?

CPSP currently has the higher Sharpe Ratio (5.08 vs 2.39), 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.