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Calamos S&P 500 Str Alt Prt ETF-May Stock Price, News & Analysis

CPSM NYSE

Company Description

The Calamos S&P 500 Structured Alt Protection ETF — May (CPSM) is part of the Calamos Structured Protection ETF suite. According to Calamos Investments, CPSM is designed to provide investors with 100% downside protection against negative S&P 500 returns over a defined one-year outcome period, before fees and expenses, while also offering an upside return that is capped for that same period.

CPSM seeks to deliver point-to-point exposure to the price return of the SPDR S&P 500 ETF Trust (SPY), which is based on the S&P 500 Index. The fund uses a basket of FLEX Options issued and guaranteed for settlement by the Options Clearing Corporation (OCC). As Calamos explains, this structure means the ETF is not expected to move directly in line with the reference asset during the interim period, and the outcomes the fund seeks to provide are tied to holding shares over the full outcome period.

Outcome period and cap structure

Calamos describes CPSM as operating over a one-year outcome period. For each outcome period, the fund is designed to provide:

  • Structured protection: 100% downside protection against negative S&P 500 returns if shares are held for the full one-year outcome period, before fees and expenses.
  • Upside cap: A pre-determined maximum percentage return (the "Cap") that limits the upside an investor can achieve over that outcome period.

In connection with a reset scheduled for May 1, 2025, Calamos announced that CPSM is expected to have an estimated upside cap range of 6.88%–7.45% over the one-year outcome period from May 1, 2025 to April 30, 2026, before fees and expenses. Structured Protection ETFs reset annually, offering a new upside cap with refreshed protection against negative benchmark returns over each subsequent 12-month period.

Reference asset and benchmarks

For CPSM, Calamos identifies the reference asset as the price return of SPDR S&P 500 ETF Trust (SPY), based on the S&P 500 Index. The fund lists benchmarks including:

  • S&P 500 Index, Price Return
  • MerQube Capital Protected US Large Cap Index – May

It is not possible to invest directly in an index, and CPSM is structured to provide capital-protected exposure to the price return of the reference asset over its stated outcome period, subject to the cap and other fund characteristics described by Calamos.

Role within Calamos Structured Protection ETFs

CPSM is described by Calamos as one of its S&P 500 Structured Alt Protection ETFs. The Structured Protection ETF suite combines Calamos’ experience in alternatives, risk management and options investing with the ETF structure. CPSM was identified as the firm’s first S&P 500 Structured Alt Protection ETF in a launch schedule that also lists additional S&P 500, Nasdaq-100, and Russell 2000 Structured Alt Protection ETFs with their own tickers, outcome periods, and cap ranges.

Calamos notes that Structured Protection ETFs are designed so that, after the conclusion of an outcome period, another outcome period begins, with the fund resetting its cap and protection parameters in line with prevailing market conditions and its stated design.

Tax treatment and holding considerations

Calamos states that gains in an ETF grow tax-deferred and, if shares are held longer than one year, they will be taxed at long-term capital gain rates, subject to applicable tax rules. For Structured Protection ETFs, including CPSM, Calamos indicates that if shares are held beyond a single outcome period, potential gains can continue to grow tax-deferred and may be taxed at long-term capital gains rates, and shares can be held indefinitely.

Calamos emphasizes that the outcomes the fund seeks to provide may only be realized if an investor is holding shares on the first day of the outcome period and continues to hold them on the last day of that period, which is approximately one year. Investors purchasing shares after an outcome period has begun may experience results that differ from the fund’s stated investment objective, and may have different exposure to both the cap and the protection level.

Key risks and structural features

According to Calamos, an investment in CPSM is subject to risks and loss of principal is possible. The firm notes that the fund faces numerous market and trading risks, including:

  • Capital protection risk and capped upside risk, reflecting the possibility that the fund may not achieve its intended protection and that returns are limited by the cap.
  • Derivatives and options risk, as the fund uses FLEX Options whose values may not increase or decrease at the same rate as the reference asset and may be affected by factors other than the price of the reference asset.
  • Liquidity, market, and trading risks, including liquidity risk, market maker risk, premium-discount risk, and secondary market trading risk.
  • Underlying ETF risk, since the fund’s exposure is tied to the price return of SPY.

Calamos also highlights that shares are bought and sold at market price, not net asset value (NAV), and are not individually redeemable from the fund. NAV represents the value of each share’s portion of the fund’s underlying assets and cash at the end of the trading day, while market price returns reflect the midpoint of the bid/ask spread as of the close of trading on the exchange where fund shares are listed.

Important considerations for CPSM investors

Calamos cautions that there are no assurances the fund will be successful in providing the sought-after protection or achieving its investment objective. The cap may rise or fall from one outcome period to the next, and an investor’s position relative to the cap and protection level can change over time. If the outcome period has begun and the underlying ETF has already increased in value, any appreciation of the fund since the commencement of the outcome period will not be protected by the sought-after protection, and an investor could experience losses until the underlying ETF returns to its original price at the commencement of the outcome period.

Similarly, if the outcome period has begun and the fund has increased in value to a level near the cap, an investor purchasing at that price has little or no ability to achieve additional gains for that outcome period but remains exposed to downside risks. Calamos indicates that the cap and the fund’s position relative to it should be considered before investing.

For detailed information on CPSM’s investment objectives, risks, charges, and expenses, Calamos directs investors to the fund’s prospectus and summary prospectus. The firm notes that investing involves risks, that loss of principal is possible, and that the fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.

Stock Performance

$28.81
+0.14%
+0.04
Last updated: February 24, 2026 at 11:42
+6.46%
Performance 1 year

SEC Filings

No SEC filings available for Calamos S&P 500 Str Alt Prt ETF-May.

Financial Highlights

Revenue (TTM)
Net Income (TTM)
Operating Cash Flow

Upcoming Events

APR
30
April 30, 2026 Product

Outcome period end

Short Interest History

Last 12 Months
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Short interest in Calamos S&P 500 Str Alt Prt ETF-May (CPSM) currently stands at 806 shares, down 34.0% from the previous reporting period, representing 0.0% of the float. Over the past 12 months, short interest has decreased by 92%. This relatively low short interest suggests limited bearish sentiment.

Days to Cover History

Last 12 Months
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Days to cover for Calamos S&P 500 Str Alt Prt ETF-May (CPSM) currently stands at 1.0 days. This low days-to-cover ratio indicates high liquidity, allowing short sellers to quickly exit positions if needed. The days to cover has decreased 52.4% over the past year, suggesting improved liquidity for short covering. The ratio has shown significant volatility over the period, ranging from 1.0 to 4.8 days.

Frequently Asked Questions

What is the current stock price of Calamos S&P 500 Str Alt Prt ETF-May (CPSM)?

The current stock price of Calamos S&P 500 Str Alt Prt ETF-May (CPSM) is $28.78 as of February 23, 2026.

What is the investment objective of Calamos S&P 500 Structured Alt Protection ETF – May (CPSM)?

According to Calamos, CPSM is designed to provide 100% downside protection against negative S&P 500 returns over a one-year outcome period, before fees and expenses, while offering exposure to the price return of the SPDR S&P 500 ETF Trust (SPY) subject to a pre-determined upside cap.

How does CPSM provide exposure to the S&P 500?

Calamos states that CPSM is designed to provide point-to-point exposure to the price return of the SPDR S&P 500 ETF Trust (SPY), which is based on the S&P 500 Index, using a basket of FLEX Options issued and guaranteed for settlement by the Options Clearing Corporation.

What is meant by the one-year outcome period for CPSM?

The one-year outcome period is the time frame over which CPSM seeks to provide its structured protection and capped upside. Calamos explains that the outcomes the fund seeks to provide may only be realized if an investor holds shares from the first day of the outcome period through the last day, which is approximately one year.

What is the upside cap for CPSM?

For the outcome period from May 1, 2025 to April 30, 2026, Calamos announced an estimated upside cap range of 6.88%–7.45% for CPSM, before fees and expenses. The cap represents the maximum percentage return an investor can achieve from an investment in the fund over that outcome period, if held for the full period.

Does CPSM guarantee that investors will not lose money?

No. Calamos notes that investing involves risks and loss of principal is possible. While CPSM is designed to provide 100% downside protection against negative S&P 500 returns over a one-year outcome period before fees and expenses, there are no assurances the fund will be successful in providing the sought-after protection or achieving its investment objective.

How do FLEX Options affect CPSM’s performance?

CPSM uses FLEX Options to implement its strategy. Calamos explains that the values of FLEX Options do not increase or decrease at the same rate as the reference asset and may vary due to factors other than the price of the reference asset, so the ETF is not expected to move directly in line with SPY during the interim period.

What tax considerations does Calamos highlight for CPSM?

Calamos states that gains in an ETF grow tax-deferred and will be taxed at long-term capital gain rates if held longer than one year, subject to applicable tax rules. For Structured Protection ETFs, holding shares beyond a single outcome period can allow potential gains to continue to grow tax-deferred and be taxed at long-term capital gains rates.

How are CPSM shares bought and sold?

Calamos notes that shares of the fund are bought and sold at market price, not net asset value (NAV), and are not individually redeemable from the fund. Market price returns reflect the midpoint of the bid/ask spread as of the close of trading on the exchange where fund shares are listed.

What are some of the key risks Calamos identifies for CPSM?

Calamos highlights risks including capital protection risk, capped upside risk, derivatives and options risk, liquidity risk, market risk, premium-discount risk, secondary market trading risk, underlying ETF risk, and others. The firm directs investors to the prospectus for a detailed list of principal risks.

How often does CPSM reset its cap and protection features?

Calamos describes Structured Protection ETFs, including CPSM, as resetting annually. After the conclusion of an outcome period, another outcome period begins, and the fund offers a new upside cap with refreshed protection against negative benchmark returns over the subsequent 12-month period.