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What Is the CPSR ETF? Returns, Expense Ratio, Holdings, and Alternative ETFs

Updated August 17, 2026 · First published August 17, 2026

Calamos S&P 500 Structured Alt Protection ETF - March (CPSR) is a structured product that participates in S&P 500 price returns while aiming to protect against losses over its outcome period. The upside cap, the conditions for buying mid-period, and the absence of any distribution history are the key criteria for assessing its dividend profile and outlook.

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What Is the Calamos S&P 500 Structured Alt Protection ETF - March?

The CPSR ETF is a structured product that seeks upside participation based on S&P 500 price returns, combining loss protection and an upside cap that apply over a defined outcome period. Rather than holding a basket of stocks directly, it relies heavily on the terms of its options structure, which have a large influence on results.

It suits investors who want to keep exposure to the equity market while also considering outcome-period-based loss management conditions.

It is an actively managed ETF run by Calamos.

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How Does the Calamos S&P 500 Structured Alt Protection ETF - March Invest?

ItemDetails
Reference benchmarkS&P 500 price return
Management styleActive management based on structured options
Rebalancing cycleReset after the end of each outcome period
Distribution frequencyNo distribution history
Total expense ratio0.69%
IssuerCalamos

The CPSR ETF participates in the upside of S&P 500 price returns while combining preset loss protection with an upside cap over a defined outcome period. Because the value of the structured options is reflected in the fund, it may not track the intraday moves of its reference asset one-for-one, unlike a typical index-tracking ETF.

  • A structure designed to combine upside participation with loss protection
  • An approach that requires checking the terms based on the outcome period and the time of purchase
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Size and Costs of the Calamos S&P 500 Structured Alt Protection ETF - March (AUM and Management Fee)

Assets under management (AUM) are $34.3M, and the total expense ratio (Expense Ratio) is 0.69% per year.

Because the CPSR ETF is designed with both an upside cap and loss protection, investors should check the current level of protection and the remaining outcome period at the time of purchase, more so than with a standard index ETF.

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Performance and Trends of the Calamos S&P 500 Structured Alt Protection ETF - March

1-Year Price Performance
Dividend & Yield
1Y Return +5.5%
52-Week Price Range
$26
Low $25 High $26
vs. low +6.13% vs. high -0.08%

The direction of the S&P 500, the reference asset, affects the product's expected return path, but the performance investors actually experience with the CPSR ETF can differ depending on the start and end conditions of the outcome period and the remaining upside potential. Therefore, rather than judging the merits of the structure from short-term price moves alone, investors should also look at the current outcome conditions.

When concern about market volatility grows, interest in loss-protection structures may rise. However, because the CPSR ETF has no distribution history, it offers a more direct point of comparison for investors who prioritize risk management over a defined outcome period and upside participation conditions rather than cash flow.

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Pros and Cons of the Calamos S&P 500 Structured Alt Protection ETF - March

The structure aimed at loss protection is a strength, but the upside cap and the differences in terms that come from buying during the outcome period deserve attention.

💪 Key Strengths

Loss protection design
If the defined outcome period is met, the product is designed to soften the impact of downturns, which ties in with risk management goals.
Upside participation
It participates in favorable S&P 500 price return trends while seeking results within a predetermined upside limit.
Structured approach
Instead of simply increasing the equity weighting, it uses an options structure to combine stock price exposure with loss management conditions.

⚠️ Points to Watch

Upside cap
Even if the reference asset rises sharply, the cap that applies over the outcome period may limit the range of return participation.
Mid-period purchase conditions
If you buy after the outcome period is underway, your level of protection and remaining upside potential may differ from those of the initial investor.
Options structure risk
The value of the options, market liquidity, and the gap between trading price and net asset value may affect performance and the trading experience.
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Alternative ETFs and Related Products to the Calamos S&P 500 Structured Alt Protection ETF - March

The BUFR ETF, included in the comparison table, takes a buffer approach that splits management across multiple outcome periods, and unlike the CPSR ETF it does not aim for full loss protection over a single outcome period. The SFLR ETF is a structure that manages a downside floor, and the BUFD ETF is designed with greater emphasis on the size of the buffer. The BUFQ ETF is based on the Nasdaq 100, so its underlying index differs in character, and the FJAN ETF is a comparison candidate that combines U.S. equity exposure with a buffer structure. These products differ in their upside limits, protection methods, and outcome period start dates, so current conditions should be compared together.

Peer Comparison ETFs
TickerNamePriceChangeAUMTotal Expense RatioDividend Yield1Y
BUFRBUFRFT Vest Laddered Buffer ETF$37.50-0.2%$11.1B0.95%-+10.8%
SFLRSFLRInnovator Equity Managed Floor ETF$38.92-0.0%$2.2B0.89%0.25%+5.5%
BUFDBUFDFT Vest Laddered Deep Buffer ETF$30.42-0.1%$2.2B0.95%-+8.9%
BUFQBUFQFT Vest Laddered Nasdaq Buffer ETF$39.17-0.3%$1.7B1.00%-+10.9%
FJANFJANFT Vest U.S. Equity Buffer ETF - January$56.57-0.3%$1.5B0.85%-+11.2%
Top Holdings
TickerNameWeightPriceChangeMarket CapP/EDividend Yield
GSEEGSEEGoldman Sachs MarketBeta Emerging Markets Equity ETF0.99%$62.92-1.6%$0.0M-2.26%
CBOXCBOXCalamos Tax-Aware Collateral ETF0.77%$102.36+0.0%$0.0M--
BNOBNOUnited States Brent Oil Fund LP0.14%$61.01+3.9%$0.0M--
JPMJPMorgan Chase & Co0.08%$342.82-0.2%$910.4B14.41.86%
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Investor Checkpoints for the Calamos S&P 500 Structured Alt Protection ETF - March

When evaluating the CPSR ETF, do not look only at whether it offers general S&P 500 exposure. Also check the start date of the outcome period, the remaining time, the current level of protection, and the upside cap. Because the product's design goals are based on the terms that apply when holding through the entire defined outcome period, expected results can differ for those who buy or sell mid-period.

CheckpointWhat to CheckCurrent Status
Outcome periodCheck the start and end dates and the remaining timeTerms may differ depending on when you hold
Upside capCheck the remaining range of upside participationMay vary with market conditions
Protection termsReview the level of protection at the time of purchaseNeeds checking when buying mid-period
Distribution policyAssess suitability for cash flow goalsNo distribution history

The CPSR ETF's protection objective assumes you hold from the start to the end of the defined outcome period. If you buy or sell during the period, there may be a possibility of loss depending on the current level of protection and the remaining upside potential. Because of the upside cap, the fund may also fail to capture the full price return of the reference asset in a strong bull market. The options structure and market price fluctuations should be considered as well.

The CPSR ETF can be a candidate for investors who want to participate in S&P 500 price returns while preferring a loss protection structure based on the outcome period. However, because it has no distribution history and is subject to an upside cap, investors who prioritize cash flow or want to fully track a rising market are advised to first confirm whether the structure fits their goals, and then approach it with an understanding of the outcome period terms.

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Disclaimer: This content is for informational purposes only and does not constitute investment advice. All investment responsibility lies with the investor.

This article reflects information as of August 17, 2026.

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