CPSP vs MAYU: which one stands where?
As of Oct 1, 2026 MAYU can fall 4.9% before its buffer engages and CPSP 3.5%, and CPSP resets 30 days sooner. Calamos S&P 500 ® Structured Alt Protection ETF - April and AllianzIM U.S. Equity Buffer15 Uncapped ETF - May.
CPSP: reference +16.4% since period start, fund +3.3%; buffer −0 to floor; cap +6.4%; At its cap.
MAYU: reference +6.1% since period start, fund +4.3%; buffer 0 to −15; no cap; No cap.
These are two different products. CPSP is a floor fund, which caps how far a holder can fall. MAYU is a buffer fund, which absorbs the first part of a fall and leaves everything below it with the holder.
CPSP is already at its cap, so more rise in the index adds nothing to it before the period ends.
They do not reset together. CPSP has 182 days of its period left and MAYU has 212, so the two are not the same bet on the same months.
Where each one stands today
CPSP resets first, on Apr 1, 2027, 182 days from now; MAYU runs to Apr 30, 2027, 212 days. A fall from here reaches CPSP’s buffer after 3.5% and MAYU’s after 4.9%. Both track SPY, so what separates them is where each is in its own period.
Every figure is ETFIQ’s own, from the issuer’s published outcome-period terms. A buffer ETF holds FLEX options on its reference index rather than shares, so there is no holdings overlap between two of them to report.
Performance, window by window
| Total return | Gap to the reference | |||
|---|---|---|---|---|
| Window | CPSP | MAYU | CPSP | MAYU |
| 3 months | +1.3% | +1.3% | −1.2 pts | −1.2 pts |
| 6 months | +3.0% | +14.6% | −13.9 pts | −2.4 pts |
| 1 year | +5.9% | +11.5% | −9.8 pts | −4.2 pts |
CPSP and MAYU over each window. Every figure is an ETFIQ calculation with distributions reinvested. Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
CPSP and MAYU on the same fields, as of Oct 1, 2026. Source: ETFIQ.
CPSP in plain words
SPY had already risen past this fund's cap of +6.4% for the period on Oct 1, 2026, so in index terms there is no more upside to collect. The fund's price can fall 3.5% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 14.3% from today's level to the point where the buffer begins. Protection left, in index points: 99.7% of the 99.7% buffer still sits below today's SPY level. 182 days remained on Oct 1, 2026. On Apr 1, 2027 the period ends and a new cap is set.
MAYU in plain words
This fund has no cap. It takes a share of any further rise in SPY. The fund's price can fall 4.9% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 5.8% from today's level to the point where the buffer begins. Protection left, in index points: 15.0% of the 15.0% buffer still sits below today's SPY level. 212 days remained on Oct 1, 2026. On Apr 30, 2027 the period ends and a new cap is set.
Questions people ask
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement. A comparison is not a recommendation.
ETFIQ, CPSP against MAYU, data as of Oct 1, 2026. https://etfiq.com/compare/buffer/cpsp-vs-mayu
Free to use with attribution. Every figure is calculated from a named public source; the method is at etfiq.com/methodology.
Cite this page. ETFIQ, CPSP against MAYU, data as of Oct 1, 2026. https://etfiq.com/compare/buffer/cpsp-vs-mayu Free to use with attribution; the underlying files are at Open data.
Other forms
- Plain
- ETFIQ, CPSP against MAYU, data as of Oct 1, 2026. https://etfiq.com/compare/buffer/cpsp-vs-mayu
- APA
- ETFIQ. (Oct 1, 2026). CPSP against MAYU. Retrieved from https://etfiq.com/compare/buffer/cpsp-vs-mayu
- Markdown
- [CPSP against MAYU (ETFIQ, Oct 1, 2026)](https://etfiq.com/compare/buffer/cpsp-vs-mayu)