CalamosDefined OutcomeCPST · NYSE Arca

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

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Price: $28.16; —12 Nov 2026
Assets: $41M; Total net assets
Expense ratio: 0.69%; Category 0.76%
Yield: 0.00%; Trailing distributions

1Y return: 4.8%-3.4%; Category 8.2%
3Y CAGR: —; Category 12.6%
5Y CAGR: —; Category 8.3%

$28.16—12 Nov 2026

Fund

Assets: $41M
Expense: 0.69%
Categ. exp: 0.76%
Yield: 0.00%

ReturnFundCateg.

1Y4.8%8.2%

3Y—12.6%

5Y—8.3%

Launch6.1%—

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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	-0.3%	+0.4%	+1.8%	+4.2%	+4.8%	—	—	—	+6.1%
Defined Outcome average	-1.3%	-0.6%	2.2%	7.1%	8.2%	12.6%	8.3%	—	7.9%
Difference	+1.1%	+1.1%	-0.4%	-2.9%	-3.4%	—	—	—	-1.8%

Holdings

Allocation as last published by the fund.

Asset mix

What the fund is invested in.

Stocks99.8%
Cash0.2%

ETF details

Issuer: Calamos
Category: Alternatives · Defined Outcome
Ticker: CPST
Exchange: NYSE Arca
Inception: 30 Aug 2024 (2.2 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: $41M

Prices and returns as of 12 Nov 2026; total return with distributions reinvested, before brokerage and taxes. Not investment advice.

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