- Issuer
- Calamos
- Inception Date
- Oct 1, 2024
- Category
- Defined Outcome
- Leveraged
- 1x (No leverage)
- Index Tracked
- No Index (Active)
- Distribution Policy
- Accumulating
- Asset Class
- Equity
- Asset Class Size
- Large-Cap
- Asset Class Style
- Blend
- Assets Under Management
- $27M
Share Price Chart
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Performance
CPSO Performance Chart
Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) is up 2.8% since the beginning of the year. CPSO is currently trading at $28 per share.
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Returns By Period
Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) has returned 2.81% so far this year and 7.09% over the past 12 months.
Calamos S&P 500 Structured Alt Protection ETF - October
- 1D
- -0.04%
- 1M
- 0.38%
- YTD
- 2.81%
- 6M
- 2.87%
- 1Y
- 7.09%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
Benchmark (S&P 500 Index)
- 1D
- -0.37%
- 1M
- -0.01%
- YTD
- 9.16%
- 6M
- 8.64%
- 1Y
- 25.22%
- 3Y*
- 19.78%
- 5Y*
- 11.99%
- 10Y*
- 13.88%
CPSO Monthly Returns History
Based on dividend-adjusted daily data since Oct 1, 2024, CPSO's average daily return is +0.02%, while the average monthly return is +0.47%. At this rate, an investment would double in approximately 12.3 years.
Historically, 81% of months were positive and 19% were negative. The best month was Apr 2026 with a return of +2.1%, while the worst month was Mar 2025 at -1.2%. The longest winning streak lasted 11 consecutive months, and the longest losing streak was 1 months.
On a daily basis, CPSO closed higher 58% of trading days. The best single day was Apr 9, 2025 with a return of +1.4%, while the worst single day was Apr 3, 2025 at -1.0%.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 0.48% | 0.10% | -0.80% | 2.08% | 0.83% | 0.11% | 2.81% | ||||||
| 2025 | 0.80% | 0.01% | -1.19% | 0.46% | 1.44% | 1.44% | 0.72% | 0.82% | 0.60% | 0.44% | 0.13% | 0.43% | 6.24% |
| 2024 | -0.04% | 0.97% | -0.04% | 0.89% |
Benchmark Metrics
Calamos S&P 500 Structured Alt Protection ETF - October has an annualized alpha of 3.06%, beta of 0.16, and R2 of 0.83 versus S&P 500 Index. Calculated based on daily prices since October 01, 2024.
- This ETF participates in less of S&P 500 Index's moves in both directions, but captures a larger share of gains (19.74%) than losses (5.75%) - typical of diversified or defensive assets.
- This ETF generated an annualized alpha of 3.06% versus S&P 500 Index - delivering returns beyond what market exposure alone would predict.
- Beta of 0.16 indicates this ETF moves significantly less than S&P 500 Index - a genuinely defensive profile with reduced participation in both market rallies and downturns.
- Alpha
- 3.06%
- Beta
- 0.16
- R²
- 0.83
- Upside Capture
- 19.74%
- Downside Capture
- 5.75%
Expense Ratio
CPSO has an expense ratio of 0.69%, placing it in the medium range.
Return for Risk
Risk / Return Rank
CPSO ranks 93 for risk / return — in the top 93% of ETFs on our site. This means strong returns relative to risk — exactly what professional investors look for. Well-suited for investors who want to maximize return per unit of risk.
Return / Risk — by metrics
The table below present risk-adjusted performance metrics for Calamos S&P 500 Structured Alt Protection ETF - October (CPSO) and compare them to S&P 500 Index.
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.
| CPSO | Benchmark | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +1.28 | ||
| Sortino ratioReturn per unit of downside risk | +2.56 | ||
| Omega ratioGain probability vs. loss probability | 1.73 | 1.37 | +0.36 |
| Calmar ratioReturn relative to maximum drawdown | 4.91 | 2.78 | +2.13 |
| Martin ratioReturn relative to average drawdown | 24.52 | 12.44 | +12.08 |
Dividends
Dividend History
Drawdowns
Drawdowns Chart
The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.
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Worst Drawdowns
The table below displays the maximum drawdowns of the Calamos S&P 500 Structured Alt Protection ETF - October. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.
The maximum drawdown for the Calamos S&P 500 Structured Alt Protection ETF - October was 3.23%, occurring on Apr 7, 2025. Recovery took 27 trading sessions.
The current Calamos S&P 500 Structured Alt Protection ETF - October drawdown is 0.04%.
Related event | Drawdown | Fall | Recovery | Underwater |
|---|---|---|---|---|
2025 selloff2025 | -3.23%Apr 2025 | 1mo 16d | 1mo 8d | 2mo 24dFeb 2025 - May 2025 |
2026 pullback2026 | -1.45%Mar 2026 | 1mo 2d | 10d | 1mo 12dFeb 2026 - Apr 2026 |
2025 pullback2025 | -0.89%Nov 2025 | 23d | 13d | 1mo 6dOct 2025 - Dec 2025 |
2024 pullback2024 | -0.56%Nov 2024 | 14d | 3d | 17dOct 2024 - Nov 2024 |
2024 pullback2024 | -0.52%Dec 2024 | 2d | 7d | 9dDec 2024 - Dec 2024 |
Drawdown Indicators
| CPSO | Benchmark | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -3.23% | -56.78% | +53.55% |
Max Drawdown (1Y)Largest decline over 1 year | -1.45% | -9.10% | +7.65% |
Max Drawdown (3Y)Largest decline over 3 years | — | -18.90% | — |
Max Drawdown (5Y)Largest decline over 5 years | — | -25.43% | — |
Max Drawdown (10Y)Largest decline over 10 years | — | -33.92% | — |
Current DrawdownCurrent decline from peak | -0.04% | -1.80% | +1.76% |
Average DrawdownAverage peak-to-trough decline | -0.32% | -10.71% | +10.39% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 0.29% | 2.03% | -1.74% |
Volatility
Volatility Chart
The chart below shows the rolling one-month volatility.
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