CalamosDefined OutcomeCPST · NYSE Arca

Calamos S&P 500 Structured Alt Protection ETF - September (CPST)

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Price: $28.14; —25 Sept 2026
Assets: $33M; Total net assets
Expense ratio: 0.69%; Category 0.76%
Yield: 0.00%; Trailing distributions

1Y return: 5.5%-5.2%; Category 10.6%
3Y CAGR: —; Category 13.6%
5Y CAGR: —; Category 8.9%

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Calamos S&P 500 Structured Alt Protection ETF - September

Calendar-year returns

Fund only: no comparison series covers this fund's history.

Risk statistics

Five years of daily closes. Risk-free rate 4% a year.

Standard deviation: —
Maximum drawdown: —
Sharpe ratio: —
Sortino ratio: —
Beta: —
Alpha: —
R²: —
Information ratio: —
Upside capture: —
Downside capture: —
Tracking error: —

Trailing returns compared with benchmark
Period	1M	3M	6M	YTD	1Y	3YCAGR	5YCAGR	10YCAGR	LaunchCAGR
ETF	+0.2%	+1.4%	+4.7%	+4.1%	+5.5%	—	—	—	+6.4%
Defined Outcome average	0.6%	3.1%	10.3%	7.9%	10.6%	13.6%	8.9%	—	9.0%
Difference	-0.4%	-1.7%	-5.6%	-3.7%	-5.2%	—	—	—	-2.5%

Holdings

Allocation as last published by the fund.

Asset mix

What the fund is invested in.

Stocks99.6%
Cash0.4%

ETF details

Issuer: Calamos
Category: Alternatives · Defined Outcome
Ticker: CPST
Exchange: NYSE Arca
Inception: 30 Aug 2024 (2.1 years)
Structure: Exchange Traded Fund
Expense ratio: 0.69% (category 0.76%)
Holdings turnover: 0% (category 4%)
Distribution yield: 0.00%
Beta, 3 years: 0.00
Total net assets: $33M

Prices and returns as of 25 Sept 2026; total return with distributions reinvested, before brokerage and taxes. Not investment advice.

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