Calamos S&P 500 Structured Alt Protection ETF… (CPSU) Performance
CPSU total return
Distributions reinvested · as of Oct 23, 2026- YTD
- +3.3% since Dec 31, 2025
- 1 year
- +4.3% total return
- Since first price
- +7.6% since 2025
CPSU trailing returns vs SPY, QQQ, AGG
| Period | CPSU total return | Price only | S&P 500 (SPY) | Nasdaq-100 (QQQ) | U.S. bonds (AGG) |
|---|---|---|---|---|---|
| 1 month | +0.3% | +0.3% | −1.0% | −5.0% | +0.9% |
| 3 months | +1.2% | +1.2% | +3.2% | +1.9% | −0.4% |
| 6 months | +1.6% | +1.6% | +7.8% | +8.4% | −1.5% |
| YTD | +3.3% | +3.3% | +12.3% | +15.1% | −1.0% |
| 1 year | +4.3% | +4.3% | +14.4% | +15.9% | −1.1% |
| Since inceptionJun 2, 2025 | +7.6% | +7.6% | — | — | — |
Total return from adjusted closes (distributions reinvested, before tax). Periods of 3 years or more are also shown annualized. Price only excludes distributions.
Growth of $10,000: CPSU vs SPY
From Jun 2, 2025: CPSU grew to $10,756, SPY to $13,035.
Year-end values with distributions reinvested, no taxes or trading costs. Start: first common trading day of both funds.
CPSU returns by calendar year
2026 is year to date.
CPSU annual returns table
| Year | CPSU | Largest drop | SPY | QQQ | AGG |
|---|---|---|---|---|---|
| 2026YTD | +3.3% | −1.0% | +12.3% | +15.1% | −1.0% |
Largest drop = deepest fall from a high within that calendar year.
Calendar-year return vs largest drop within the year
Most years include a sizable fall at some point even when the year ends higher.
CPSU risk statistics
| Statistic | Since 2025 |
|---|---|
| Annualized return | +4.9% |
| Volatility (annualized) | 1.4% |
| Sharpe ratio | 0.76 |
| Sortino ratio | 1.47 |
| Best month | +1.4% |
| Worst month | −0.3% |
| Best 12 months | +5.1% |
| Worst 12 months | +4.4% |
| Positive months | 87% |
| Beta vs S&P 500 | — |
| Correlation with S&P 500 | — |
From monthly total returns. Sharpe and Sortino use 1–3 month T-bills (BIL) as the risk-free rate, so they need history from 2007 on.
CPSU rolling returns
| Holding period | Periods | Worst | Median | Best | Positive |
|---|---|---|---|---|---|
| 1-year | 5 | +4.2% | +5.0% | +5.1% | 100% |
Every holding period starting at a month-end since 2025. Returns for 3 years and longer are annualized.
CPSU performance overview
Calamos S&P 500 Structured Alt Protection ETF… (CPSU) returned +4.3% over the past year, with distributions reinvested. Since its first recorded price on Jun 2, 2025 it has returned +7.6%. Over the same year S&P 500 (SPY) returned +14.4%.
Related: CPSU chart. See the CPSU overview for the latest quote and fund facts.
CPSU performance FAQ
What is the CPSU return over the past year?
CPSU returned +4.3% over the 12 months to October 23, 2026, including reinvested distributions. On price alone it rose 4.3%.
How much would $10,000 invested in CPSU be worth?
$10,000 invested in CPSU at its first recorded close on June 2, 2025 would be worth about $10,756 on October 23, 2026 with distributions reinvested.
How volatile is CPSU?
Over the past history CPSU had an annualized volatility of 1.4% and a Sharpe ratio of 0.76 (excess return over 1–3 month T-bills per unit of risk).