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

CPSU NYSE

Company Description

The Calamos S&P 500 Structured Alt Protection ETF – June (CPSU) is an exchange-traded fund in the Calamos Structured Protection ETF suite. According to Calamos Investments, CPSU is designed to provide exposure to the price return of the SPDR S&P 500 ETF Trust (SPY), which is based on the S&P 500 Index, while seeking 100% downside protection over a defined one-year outcome period, before fees and expenses. The fund applies a cap on upside returns over that outcome period.

CPSU is part of a group of Structured Protection ETFs that, as described by Calamos, combine the firm’s experience in alternatives, risk management and options investing with the ETF structure. The fund is managed by Calamos Investments LLC through its alternatives team and uses a portfolio of FLEX Options issued and guaranteed for settlement by the Options Clearing Corporation (OCC) to target its stated outcome profile relative to its reference asset.

Investment objective and reference asset

As outlined in the product information, CPSU seeks point-to-point exposure to the price return of SPY over an approximately one-year outcome period. The fund’s benchmark references the S&P 500 Index on a price return basis. The structure is intended to provide 100% downside protection against negative price returns of the reference asset over the outcome period, before fees and expenses, while limiting upside through a predetermined cap rate.

The fund’s design means it is not expected to move directly in line with SPY during the interim period between the start and end of the outcome period. Instead, its returns are shaped by the values of the FLEX Options held in the portfolio and the remaining time in the outcome period.

Outcome periods, caps and protection

Calamos describes CPSU as operating in one-year outcome periods. The initial outcome period begins on the fund’s inception date, and subsequent outcome periods begin on the first day of the same month in later years. For each outcome period, the fund has:

  • A Cap Rate, which is the maximum percentage return an investor can achieve from an investment in the fund if held over the full outcome period, before fees and expenses.
  • A Protection Level, which reflects the amount of downside protection the fund is designed to provide against negative price returns of the reference asset over the outcome period, before fees and expenses.

The information provided by Calamos emphasizes 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 of that period. If shares are purchased after an outcome period has begun, or sold before it ends, an investor’s experience can differ significantly from the stated objectives.

Role within the Calamos ETF lineup

The launch of CPSU completes the Calamos Laddered S&P 500 Structured Alt Protection ETF (CPSL), which is described as offering S&P 500 equity market exposure while mitigating downside risk through a laddered portfolio of 12 underlying Calamos S&P 500 Structured Alt Protection ETFs. CPSU is one of those underlying S&P 500 Structured Protection ETFs, each with its own outcome period and cap.

Within the broader Calamos Investments organization, CPSU sits alongside other Structured Protection ETFs, such as the Calamos Nasdaq-100 Structured Alt Protection ETF – June (CPNJ). Calamos Investments is described as a diversified global investment firm that offers strategies across alternatives, multi-asset, convertible, fixed income, private credit, equity and sustainable equity, delivered through vehicles that include ETFs, mutual funds, closed-end funds, interval funds, UCITS funds and separately managed portfolios.

Use of FLEX Options and key risks

CPSU’s strategy relies on FLEX Options. Calamos notes that these options are issued and guaranteed for settlement by the Options Clearing Corporation. The fund’s documentation highlights that FLEX Options may be less liquid than standard options, and that the values of FLEX Options do not increase or decrease at the same rate as the reference asset. As a result, the ETF is not expected to track the reference asset’s price return on a day-to-day basis.

The risk disclosures associated with the Structured Protection ETFs state that investing involves risks and loss of principal is possible. Among the principal risks cited are capital protection risk, capped upside risk, options risk, derivatives risk, equity securities risk, liquidity risk, market risk, non-diversification risk, premium-discount risk, secondary market trading risk, sector risk, tax risk, underlying ETF risk and valuation risk. The information also notes that there are no assurances the fund will be successful in providing the sought-after protection or achieving its investment objective.

Tax and trading considerations

Calamos highlights that gains in an ETF can grow tax-deferred and may be taxed at long-term capital gain rates if shares are held longer than one year, and that shares of the fund are bought and sold at market price rather than net asset value (NAV). 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 on the exchange where shares are listed.

The fund’s materials also explain that investors purchasing shares after an outcome period has begun may experience results that differ from the fund’s stated investment objective. If the fund’s price has already increased close to the cap, a new investor may have limited or no ability to achieve gains during the remainder of the outcome period, while still being exposed to downside risks.

Licensing and index relationship

The S&P 500 is described as a product of S&P Dow Jones Indices LLC or its affiliates and is licensed for use by Calamos Advisors LLC. The disclosures emphasize that it is not possible to invest directly in an index and that the Calamos S&P 500 Structured Protection ETFs are not sponsored, endorsed, sold or promoted by S&P Dow Jones Indices, Dow Jones, S&P or their affiliates. These entities make no representation regarding the advisability of investing in securities generally or in the Calamos S&P 500 Structured Protection ETFs in particular.

Important considerations for investors

Information from Calamos stresses that an investment in CPSU is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. The fund’s prospectus and summary prospectus are identified as the primary sources for details on investment objectives, risks, charges and expenses. The disclosures also note that there can be no assurance the fund will achieve its investment objective and that the risks associated with an investment can increase during periods of significant market volatility.

Stock Performance

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SEC Filings

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

Financial Highlights

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

Upcoming Events

Short Interest History

Last 12 Months
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Short interest in Calamos S&P 500 Str Alt Prt ETF-Jun (CPSU) currently stands at 17.2 thousand shares, up 19.5% from the previous reporting period, representing 3.4% of the float. Over the past 12 months, short interest has decreased by 31.6%. This relatively low short interest suggests limited bearish sentiment. With 85.9 days to cover, it would take significant time for short sellers to close their positions based on average trading volume.

Days to Cover History

Last 12 Months
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Days to cover for Calamos S&P 500 Str Alt Prt ETF-Jun (CPSU) currently stands at 85.9 days, up 176.1% from the previous period. This elevated days-to-cover ratio indicates it would take over two weeks of average trading volume for short sellers to exit their positions, suggesting potential for a short squeeze if positive news emerges. The days to cover has increased 8487% over the past year, indicating either rising short interest or declining trading volume. The ratio has shown significant volatility over the period, ranging from 1.0 to 1000.0 days.

Frequently Asked Questions

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

The current stock price of Calamos S&P 500 Str Alt Prt ETF-Jun (CPSU) is $27.26 as of March 5, 2026.

What is the Calamos S&P 500 Structured Alt Protection ETF – June (CPSU)?

CPSU is an exchange-traded fund in the Calamos Structured Protection ETF suite that seeks exposure to the price return of the SPDR S&P 500 ETF Trust (SPY), based on the S&P 500 Index, while targeting 100% downside protection and a capped upside over a defined one-year outcome period, before fees and expenses.

What is the reference asset for CPSU?

According to Calamos, CPSU’s reference asset is the price return of the SPDR S&P 500 ETF Trust (SPY), which is based on the S&P 500 Index. The fund aims to provide point-to-point exposure to this price return over its outcome period.

How does CPSU seek to provide downside protection and capped upside?

CPSU uses a basket of FLEX Options linked to its reference asset. These options are structured so that, if shares are held for the full outcome period, the fund is designed to provide 100% downside protection against negative price returns of the reference asset, before fees and expenses, while limiting upside through a predetermined cap rate.

What is an outcome period for CPSU?

The fund operates in approximately one-year outcome periods. The initial outcome period begins on the fund’s inception date, and each subsequent outcome period begins on the first day of the same month in later years. The cap and protection level apply over each specific outcome period.

Will CPSU track the S&P 500 or SPY on a daily basis?

Calamos states that the fund is designed to provide point-to-point exposure to the price return of its reference asset over an outcome period, and it is not expected to move directly in line with the reference asset during the interim period. The values of the FLEX Options and time remaining in the outcome period affect its performance.

What are some key risks of investing in CPSU?

The risk disclosures for the Structured Protection ETFs note that investing involves risks and loss of principal is possible. Principal risks cited include capital protection risk, capped upside risk, options risk, derivatives risk, equity securities risk, liquidity risk, market risk, non-diversification risk, premium-discount risk, secondary market trading risk, sector risk, tax risk, underlying ETF risk and valuation risk.

How does CPSU fit into the Calamos Laddered S&P 500 Structured Alt Protection ETF (CPSL)?

Calamos indicates that CPSU is one of the 12 underlying Calamos S&P 500 Structured Alt Protection ETFs used in the Calamos Laddered S&P 500 Structured Alt Protection ETF (CPSL). CPSL uses a laddered portfolio of these underlying funds to provide S&P 500 equity market exposure while seeking to mitigate downside risk.

What is the role of FLEX Options in CPSU?

CPSU utilizes FLEX Options issued and guaranteed for settlement by the Options Clearing Corporation. These options allow the fund to shape its payoff profile relative to the reference asset, supporting the targeted downside protection and capped upside over each outcome period, though they may be less liquid than standard options and may not move in line with the reference asset.

How are taxes described for investments in CPSU?

Calamos notes that gains in an ETF can grow tax-deferred and may be taxed at long-term capital gain rates if shares are held longer than one year. However, investors are directed to the fund’s prospectus and their own tax advisors for details on tax implications.

Where can investors find detailed information about CPSU’s objectives and risks?

The disclosures emphasize that investors should consult the fund’s prospectus and summary prospectus for detailed information about CPSU’s investment objectives, risks, charges and expenses. These documents are identified as the primary sources for understanding the fund.