Calamos S&P 500 Structured Alt Protection ETF - October

CPSO
ETF Ticker

+5.22%

+6.17%

NYSE Arca Exchange

Alternative

United States

Risk-Controlled

The Calamos S&P 500 Structured Alt Protection ETF - October, CPSO_US, is an actively managed strategy providing exposure to United States, Risk-Controlled Alternative. It is listed on the NYSE Arca Exchange and has assets under management of $27.5m (as of Aug 31, 2026). The ETF trades in USD and was listed on the exchange on Oct 1, 2024. It has a net expense ratio of 69bps. (All data in USD as of Oct 15, 2026 unless stated.)

The investment strategy underpinning the actively managed Calamos S&P 500 Structured Alt Protection ETF – October delivers price-return participation in the SPDR S&P 500 ETF Trust through OCC-cleared FLEX options structured to provide full capital protection at the end of each October–to–October outcome period, with an upside cap fixed when the period begins. The fund concentrates assets in a coordinated package of FLEX calls and puts that share a common maturity and are selected to map the intended payoff; cash and U.S. Treasury instruments may be used for collateral and liquidity management. Portfolio construction targets 1:1 upside participation up to the cap; sector and issuer exposures mirror the Underlying ETF’s price return (no dividend accrual). Shares trade intraday on NYSE Arca; primary liquidity is supported by the creation/redemption mechanism and listed FLEX market capacity. Rebalancing is minimal intra-period, with a rules-based roll into new FLEX series each October.

ETF Details

Key Facts

Issuer:
Calamos
AUM:
$27.5m (as of Aug 31, 2026)
Net Expense Ratio:
69 bps
Inception Date:
Oct 1, 2024
Index:
Actively managed strategy
Dividend Frequency:
No scheduled dividend

Trading

Ticker:
CPSO
Exchange:
NYSE Arca Exchange
ISIN:
US12811T8291
Trading Currency:
USD
Domicile:
United States

Classification & Risk

Asset Class:
Alternative
Asset Region:
United States
Theme:
Risk-Controlled
Economic Development:
Developed Markets
1 Year Volatility:
2.18%
3 Year Volatility:
N/A
5 Year Volatility:
N/A

Performance

TTM Dividend Yield:
0.00% (verify with issuer)
1 Month Performance:
0.84%
3 Month Performance:
1.87%
6 Month Performance:
3.90%
1 Year Performance:
6.17%
3 Year Performance:
N/A
5 Year Performance:
N/A
Investment Proposition

Calamos S&P 500 Structured Alt Protection ETF – October (CPSO) targets equity participation with an options-driven, outcome-oriented payoff that buffers a portion of downside and caps upside through an October-aligned period. The approach emphasizes smoother equity exposure using a repeatable options framework that can lower effective volatility and improve the predictability of terminal outcomes relative to traditional equity holdings. Return characteristics generally reflect muted drawdowns within the buffer and diminishing marginal gains as the cap is approached; cash flows stem primarily from option premiums and will vary across regimes. CPSO tends to be well-suited for sideways or modestly rising markets, while extended, powerful uptrends can challenge it as the cap constrains further participation. It can function as a defensive equity sleeve, a “sleep-well” satellite within a diversified allocation, or a time-segmented bucket for investors matching liabilities to outcome periods. Appropriate users include conservative growth mandates and outcome-based allocators integrating behavioral risk control. A notable risk is period-specific path dependency: interim pricing can deviate from intuitive expectations, and reaching the cap early may impose opportunity costs if rallies persist.

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