# CPSP (Calamos S&P 500 ® Structured Alt Protection ETF - April)

Calamos · Buffer ETFs · data as of Sep 12, 2026

As of Sep 12, 2026, CPSP has reached its cap.

## Key facts

- CPSP, fall before the buffer: 3.2%, as of Sep 12, 2026.
- CPSP, protection left, index points: 99.7%, as of Sep 12, 2026.
- CPSP, days to reset: 201, as of Sep 12, 2026.
- CPSP, net assets: $19m (source, as filed for Apr 30, 2026).
- CPSP, expense ratio: 0.69% (issuer page, Sep 12, 2026).
- CPSP, reference index: SPY, as of Sep 12, 2026.

## Every published field

| Field | Value | Source |
| --- | --- | --- |
| Reference index | SPY | ETFIQ |
| Buffer | 0% to 100% | ETFIQ |
| Outcome period | Apr 1, 2026 to Apr 1, 2027 | ETFIQ |
| Starting cap | +6.4% | ETFIQ |
| SPY return since period start | +16.6% | ETFIQ |
| Fund return since period start | +3.1% | ETFIQ |
| Net assets | $19m | source, as filed for Apr 30, 2026 |
| Band state today | At cap | ETFIQ |
| Can still gain | not published | issuer, fund price |
| Fall before buffer | 3.2% | issuer, fund price |
| Fall to the buffer in index terms | 14.5% | ETFIQ |
| Protection left in index points | 99.7% of 99.7% | ETFIQ |
| Days left in period | 201 | ETFIQ |
| Expense ratio | 0.69% | issuer page, Sep 12, 2026 |

## Questions

### How much can CPSP still gain?

Nothing more in index terms on Sep 12, 2026. SPY has already passed the cap of +6.4% for this period, which runs from Apr 1, 2026 to Apr 1, 2027.

### How far can CPSP fall before the buffer helps?

3.2% in fund-price terms on Sep 12, 2026, by the issuer's figure. In index terms SPY can fall 14.5% from that level before the buffer begins. Losses until that point are the holder's.

### How much of the CPSP buffer is left?

99.7% of the 99.7% buffer sat below the SPY level on Sep 12, 2026. That is an ETFIQ calculation in index points, on one definition for every issuer.

### When does CPSP reset?

The outcome period ends on Apr 1, 2027, 201 days from the data on Sep 12, 2026. A new cap is set the next day and the buffer starts again.

### What does CPSP cost?

The prospectus expense ratio is 0.69% a year.


## Cite this page

ETFIQ, CPSP, data as of Sep 12, 2026. https://etfiq.com/funds/CPSP
Free to use with attribution; the underlying files are at https://etfiq.com/data/.

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