CPSU vs MAYM: Cap, Buffer & Days Left
As of Oct 9, 2026 MAYM can fall 2.7% before its buffer engages and CPSU 1.6%, and MAYM resets 7 days sooner. Net assets on Oct 9, 2026: $29m for Calamos S&P 500 ® Structured Alt Protection ETF - June and $39m for FT Vest U.S. Equity Max Buffer ETF - May.
CPSU costs 0.16 points a year less; their one-year returns differ by 0.1 points; MAYM is 1.4 times larger.
| CPSU | MAYM | |
|---|---|---|
| Expense ratio | 0.69% | 0.85% |
| Net assets | $29m | $39m |
| Total return, 1 year | +4.9% | +5.0% |
| What it tracks | SPY | SPY |
| Holdings in common | not published | |
| Index fall to the buffer | 2.6% | 5.1% |
CPSU: reference +2.6% since period start, fund +1.5%; buffer Floor; cap +7.3%; Full floor. Figures to Oct 9, 2026.
Figures to Oct 9, 2026.
MAYM: reference +5.3% since period start, fund +1.9%; buffer Floor; cap +7.0%; Full floor. Figures to Oct 9, 2026.
Figures to Oct 9, 2026.
Where each one stands today
MAYM resets first, on May 21, 2027, 224 days from now; CPSU runs to May 28, 2027, 231 days. A fall from here reaches CPSU’s buffer after 1.6% and MAYM’s after 2.7%. Both track SPY, so what separates them is where each is in its own period.
Performance, window by window
| Total return | Gap to the reference's price return | |||
|---|---|---|---|---|
| Window | CPSU | MAYM | CPSU | MAYM |
| 3 months | +1.4% | +1.4% | −1.8 pts | −1.8 pts |
| 6 months | +2.4% | +2.5% | −12.2 pts | −12.1 pts |
| 1 year | +4.9% | +5.0% | −11.1 pts | −10.9 pts |
Each fund's gap is to its reference's price return, dividends left out: the basis the outcome period uses. Source: ETFIQ. Open the live comparison on ETFIQ →
On the same fields
As of Oct 9, 2026. Source: ETFIQ.
CPSU in plain words
The fund's price can fall 1.6% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 2.6% from today's level to the point where the buffer begins. Protection left, in index points: 100.0% of the 100.0% buffer still sits below today's SPY level. 231 days remained on Oct 9, 2026. On May 28, 2027 the period ends and a new cap is set.
MAYM in plain words
From its price on Oct 9, 2026, the fund can gain about 4.2% more before it reaches its cap. The fund's price can fall 2.7% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 5.1% from today's level to the point where the buffer begins. 224 days remained on Oct 9, 2026. On May 21, 2027 the period ends and a new cap is set.
Questions people ask
ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.
How this is computed
ETFIQ calculates every figure from each issuer’s published outcome-period terms. Buffer ETFs hold options on an index, not shares, so there is no holdings overlap to report.
Every figure is an ETFIQ calculation with distributions reinvested.
ETFIQ, CPSU against MAYM, data as of Oct 9, 2026. https://etfiq.com/compare/buffer/cpsu-vs-maym
ETFIQ. (Oct 9, 2026). CPSU against MAYM. Retrieved from https://etfiq.com/compare/buffer/cpsu-vs-maym
[CPSU against MAYM (ETFIQ, Oct 9, 2026)](https://etfiq.com/compare/buffer/cpsu-vs-maym)
Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.